Sediment dynamics in a transboundary mangrove habitat : a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya
Mangroves are essential providers of environmental, economic, and ecological ecosystem services. Mangroves of Vanga occur in the most southerly coastal area of Kenya. They transcend the Kenya-Tanzania border and receive fresh water and particulate materials from the transboundary Umba River. Consequ...
Ausführliche Beschreibung
Autor*in: |
Kimeli, Amon Kibiwot [verfasserIn] Westphal, Hildegard - 1968- [akademischer betreuerIn] Hinderer, Matthias - 1961- [akademischer betreuerIn] |
---|---|
Körperschaften: |
Universität Bremen [Grad-verleihende Institution] |
Hochschulschrift: |
Dissertation ; Universität Bremen ; 2022 |
Format: |
E-Book |
---|---|
Sprache: |
Englisch |
Erschienen: |
Bremen: 2022 |
---|
Schlagwörter: | |
---|---|
Formangabe: |
Hochschulschrift |
Umfang: |
1 Online-Ressource (xxii, 144, XXXV Seiten) ; Illustrationen |
---|
Weitere Ausgabe: |
Erscheint auch als Druck-Ausgabe Kimeli, Amon Kibiwot: Sediment dynamics in a transboundary mangrove habitat - Bremen, 2022 |
---|
Links: |
Link aufrufen |
---|
DOI / URN: |
urn:nbn:de:gbv:46-elib59411 10.26092/elib/1546 |
---|
Katalog-ID: |
1804446297 |
---|
LEADER | 01000cam a2200265 4500 | ||
---|---|---|---|
001 | 1804446297 | ||
003 | DE-627 | ||
005 | 20240912025629.0 | ||
007 | cr uuu---uuuuu | ||
008 | 220527s2022 gw |||||om 00| ||eng c | ||
024 | 7 | |a urn:nbn:de:gbv:46-elib59411 |2 urn | |
024 | 7 | |a 10.26092/elib/1546 |2 doi | |
035 | |a (DE-627)1804446297 | ||
035 | |a (DE-599)KXP1804446297 | ||
035 | |a (OCoLC)1321074893 | ||
040 | |a DE-627 |b ger |c DE-627 |e rda | ||
041 | |a eng | ||
044 | |c XA-DE-HB | ||
082 | 0 | 4 | |a 551.468 |q DE-101 |
082 | 0 | 4 | |a 550 |q DE-101 |
100 | 1 | |a Kimeli, Amon Kibiwot |e verfasserin |0 (orcid)0000-0002-0798-7624 |4 aut | |
245 | 1 | 0 | |a Sediment dynamics in a transboundary mangrove habitat |b a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya |c Amon Kibiwot Kimeli |
264 | 1 | |a Bremen |c 2022 | |
300 | |a 1 Online-Ressource (xxii, 144, XXXV Seiten) |b Illustrationen | ||
336 | |a Text |b txt |2 rdacontent | ||
337 | |a Computermedien |b c |2 rdamedia | ||
338 | |a Online-Ressource |b cr |2 rdacarrier | ||
502 | |b Dissertation |c Universität Bremen |d 2022 | ||
520 | |a Mangroves are essential providers of environmental, economic, and ecological ecosystem services. Mangroves of Vanga occur in the most southerly coastal area of Kenya. They transcend the Kenya-Tanzania border and receive fresh water and particulate materials from the transboundary Umba River. Consequently, they provide a unique opportunity to study system dynamics borne of both anthropogenic and natural disturbances. Cognizant of the universal threat that mangroves face with respect to sea-level rise (SLR), the need to understand sediments dynamics within the Vanga estuary is vital for their conservation and management. This is because sedimentation has been identified as one of the factors that will allow mangroves to mitigate and modulate the effects of SLR. However, our knowledge and understanding of the sediment dynamics in the Vanga Estuary are limited. Consequently, it jeopardizes plans on mitigation and adaptive measures to be undertaken in the face of SLR and other resource management issues. We hypothesized that most of the Vanga Estuary sediments are sourced from the Umba River catchment, with minimal contribution from tidal and in-situ production. Therefore, the overall aim of this doctoral study is to investigate the influence of the transboundary Umba River on the connectivity of downstream coastal habitats and the terrestrial catchment. To achieve the objectives of this study, we evaluated 1) the geochemical and mineralogical composition of the Umba River sediments 2) analyzed and modeled elemental carbon (C), nitrogen (N), and their stable isotopes to determine the possible sources of sediment organic matter delivered to the Vanga estuary and 3) measured current sedimentation rates in the Vanga estuary to evaluate the possible response of Vanga mangroves to current and future rates of SLR. First, the Umba River sediments showed similar source geology along the river’s course from the source to its mouth in the Vanga Estuary. This is reflected by the similarity in the mineralogy and the chemical composition of sediments evident by the dominant mafic to felsic minerals discernible in both upstream and downstream sediments. The Umba River sediments also exhibit a moderate to high Chemical Index of Alteration (CIA) attributed to the variation from the dry to cold climate upstream (near the source) and humid climate further downstream. Secondly, based on the combined evaluation of elemental carbon (C) and nitrogen (N), C/N ratio, carbon, and nitrogen isotopes, together with the results of the applied Stable Isotope Mixing Model, a mixed source of sediment organic matter in the Vanga Estuary was observed. The mixing is attributed to the daily hydrodynamic flushing and bioturbation under the mangrove canopy. The model results also indicated that riverine organic matter was the dominant source with ~60% contribution to the total sediment organic matter. It validated our hypothesis on the influence of the Umba River on the Vanga Estuary. With sediment organic matter as a proxy, we conclude that the terrestrial catchment and Vanga Estuary are connected, with Umba River supplying both freshwater and sediments. Finally, having determined the connectivity of the Umba River catchment, downstream mangrove habitat in Vanga, and the consequent sediment input, we further evaluated the fate of the sediments in terms of deposition and mangrove surface elevation. Our data indicate that mangrove surface elevation is experiencing shallow subsidence of up to -15 mm/yr. At the same time, sediments also accreted by a rate of up to 9 mm/yr on the mangrove surface. This accretion rate exceeds the current rates of local SLR (3.8 mm/yr) and global SLR (3.1 mm/yr). The mangroves of Vanga would therefore be able to keep pace and persist under the current rates of SLR. However, accelerated SLR would marginally outpace the net mangrove surface elevation in Vanga. Our study implies that adaptive measures on mangrove conservation and management in Vanga need to capture the complex intra- and interhabitat sediment dynamics and interactions. This would include policy interventions through comprehensive and integrated cross-border resource management and governance. | ||
583 | 1 | |a Archivierung/Langzeitarchivierung gewährleistet |f PEHB |x XA-DE-HB |2 pdager |5 DE-46 | |
650 | 4 | |a Kenya | |
650 | 4 | |a Tanzania | |
650 | 4 | |a Vanga | |
650 | 4 | |a transboundary | |
650 | 4 | |a sediments | |
650 | 4 | |a sedimentation | |
650 | 4 | |a mangroves | |
650 | 4 | |a Sea-level rise | |
650 | 4 | |a accretion | |
650 | 4 | |a provenance | |
650 | 4 | |a modeling | |
650 | 4 | |a conservation | |
650 | 4 | |a Umba River | |
650 | 4 | |a geochemical analysis | |
650 | 4 | |a mineralogy | |
655 | 7 | |a Hochschulschrift |0 (DE-588)4113937-9 |0 (DE-627)105825778 |0 (DE-576)209480580 |2 gnd-content | |
700 | 1 | |a Westphal, Hildegard |d 1968- |e akademischer betreuerin |0 (DE-588)12027941X |0 (DE-627)080573355 |0 (DE-576)292134827 |4 dgs | |
700 | 1 | |a Hinderer, Matthias |d 1961- |e akademischer betreuerin |0 (DE-588)172999847 |0 (DE-627)697925285 |0 (DE-576)133853098 |4 dgs | |
710 | 2 | |a Universität Bremen |e Grad-verleihende Institution |0 (DE-588)2001386-3 |0 (DE-627)101380429 |0 (DE-576)191575038 |4 dgg | |
751 | |a Bremen |0 (DE-588)4008135-7 |0 (DE-627)106369636 |0 (DE-576)208874569 |4 uvp | ||
776 | 0 | 8 | |i Erscheint auch als |n Druck-Ausgabe |a Kimeli, Amon Kibiwot |t Sediment dynamics in a transboundary mangrove habitat |d Bremen, 2022 |h xxii, 144, XXXV Seiten |w (DE-627)1804448133 |
856 | 4 | 0 | |u https://doi.org/10.26092/elib/1546 |x Resolving-System |z kostenfrei |
856 | 4 | 0 | |u https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 |x Resolving-System |z kostenfrei |
856 | 4 | 0 | |u https://d-nb.info/1338949020/34 |x Langzeitarchivierung Nationalbibliothek |z kostenfrei |
856 | 4 | 0 | |u https://media.suub.uni-bremen.de/handle/elib/5941 |x Verlag |z kostenfrei |
912 | |a GBV-ODiss | ||
912 | |a GBV_ILN_20 | ||
912 | |a ISIL_DE-84 | ||
912 | |a SYSFLAG_1 | ||
912 | |a GBV_KXP | ||
912 | |a GBV_ILN_21 | ||
912 | |a ISIL_DE-46 | ||
912 | |a GBV_ILN_22 | ||
912 | |a ISIL_DE-18 | ||
912 | |a GBV_ILN_23 | ||
912 | |a ISIL_DE-830 | ||
912 | |a GBV_ILN_30 | ||
912 | |a ISIL_DE-104 | ||
912 | |a GBV_ILN_40 | ||
912 | |a ISIL_DE-7 | ||
912 | |a GBV_ILN_60 | ||
912 | |a ISIL_DE-705 | ||
912 | |a GBV_ILN_63 | ||
912 | |a ISIL_DE-Wim2 | ||
912 | |a GBV_ILN_70 | ||
912 | |a ISIL_DE-89 | ||
912 | |a GBV_ILN_105 | ||
912 | |a ISIL_DE-841 | ||
912 | |a GBV_ILN_110 | ||
912 | |a ISIL_DE-Luen4 | ||
912 | |a GBV_ILN_132 | ||
912 | |a ISIL_DE-959 | ||
912 | |a GBV_ILN_151 | ||
912 | |a ISIL_DE-546 | ||
912 | |a GBV_ILN_161 | ||
912 | |a ISIL_DE-960 | ||
912 | |a GBV_ILN_293 | ||
912 | |a ISIL_DE-960-3 | ||
912 | |a GBV_ILN_370 | ||
912 | |a ISIL_DE-1373 | ||
912 | |a GBV_ILN_2403 | ||
912 | |a ISIL_DE-LFER | ||
935 | |i DSpace | ||
951 | |a BO | ||
980 | |2 20 |1 01 |x 0084 |b 4593077702 |y x |z 12-10-24 | ||
980 | |2 21 |1 01 |x 0046 |b 4139873809 |h ebook_2022_dissbremen |k Kostenloser Zugriff |y zza |z 27-05-22 | ||
980 | |2 22 |1 01 |x 0018 |b 4593180473 |h SUBolrd |y xu |z 12-10-24 | ||
980 | |2 23 |1 01 |x 0830 |b 4593229472 |h olr-d |y x |z 12-10-24 | ||
980 | |2 30 |1 01 |x 0104 |b 4593276462 |y z |z 12-10-24 | ||
980 | |2 40 |1 01 |x 0007 |b 4593310067 |y xsn |z 12-10-24 | ||
980 | |2 60 |1 01 |x 0705 |b 4593368014 |h OLRD |y z |z 12-10-24 | ||
980 | |2 63 |1 01 |x 3401 |b 4593423503 |h ORD |y x |z 12-10-24 | ||
980 | |2 70 |1 01 |x 0089 |b 459347499X |y z |z 12-10-24 | ||
980 | |2 105 |1 01 |x 0841 |b 4593866405 |y z |z 12-10-24 | ||
980 | |2 110 |1 01 |x 3110 |b 4593578604 |y x |z 12-10-24 | ||
980 | |2 132 |1 01 |x 0959 |b 459362231X |h OLR-DISS |y x |z 12-10-24 | ||
980 | |2 151 |1 01 |x 0546 |b 4593665264 |h OLR-ODISS |y z |z 12-10-24 | ||
980 | |2 161 |1 01 |x 0960 |b 4593688345 |h ORD |y z |z 12-10-24 | ||
980 | |2 293 |1 01 |x 3293 |b 4593816289 |h ORD |y z |z 12-10-24 | ||
980 | |2 370 |1 01 |x 4370 |b 4593853826 |y x |z 12-10-24 | ||
980 | |2 2403 |1 01 |x DE-LFER |b 4185162596 |c 00 |f --%%-- |d --%%-- |e n |j --%%-- |y l01 |z 06-09-22 | ||
981 | |2 20 |1 01 |x 0084 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 21 |1 01 |x 0046 |r https://doi.org/10.26092/elib/1546 |z LF | ||
981 | |2 22 |1 01 |x 0018 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 23 |1 01 |x 0830 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 30 |1 01 |x 0104 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 40 |1 01 |x 0007 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 60 |1 01 |x 0705 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 63 |1 01 |x 3401 |y E-Book |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 |z LF | ||
981 | |2 70 |1 01 |x 0089 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 105 |1 01 |x 0841 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 110 |1 01 |x 3110 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 132 |1 01 |x 0959 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 151 |1 01 |x 0546 |y Volltext |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 161 |1 01 |x 0960 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 293 |1 01 |x 3293 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 370 |1 01 |x 4370 |r https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 | ||
981 | |2 2403 |1 01 |x DE-LFER |r https://doi.org/10.26092/elib/1546 | ||
982 | |2 21 |1 00 |x DE-46 |8 00 |a Universität Bremen | ||
983 | |2 60 |1 01 |x 0705 |8 10 |a ho | ||
985 | |2 20 |1 01 |x 0084 |a OLRD | ||
985 | |2 110 |1 01 |x 3110 |a OLRD | ||
985 | |2 370 |1 01 |x 4370 |a OLRD | ||
995 | |2 21 |1 01 |x 0046 |a ebook_2022_dissbremen | ||
995 | |2 22 |1 01 |x 0018 |a SUBolrd | ||
995 | |2 23 |1 01 |x 0830 |a olr-d | ||
995 | |2 60 |1 01 |x 0705 |a OLRD | ||
995 | |2 63 |1 01 |x 3401 |a ORD | ||
995 | |2 132 |1 01 |x 0959 |a OLR-DISS | ||
995 | |2 151 |1 01 |x 0546 |a OLR-ODISS | ||
995 | |2 161 |1 01 |x 0960 |a ORD | ||
995 | |2 293 |1 01 |x 3293 |a ORD | ||
998 | |2 23 |1 01 |x 0830 |0 2024-10-12 10:31:16 |
matchkey_str |
kimeliamonkibiwotwestphalhildegardhinder:2022----:eietyaisntasonay |
---|---|
oclc_num |
1321074893 |
publishDate |
2022 |
building |
20 21:z 22:u 23 30 40:s 60 63 70 105 110 132 151 161 293 370 2403:0 |
topic_facet |
Kenya Tanzania Vanga transboundary sediments sedimentation mangroves Sea-level rise accretion provenance modeling conservation Umba River geochemical analysis mineralogy |
hochschulschrift_txt_mv |
Dissertation Universität Bremen 2022 |
sw_local_iln_str_mv |
21:Universität Bremen DE-46:Universität Bremen |
isfreeaccess_bool |
true |
publishDateDaySort_date |
2022-01-01T00:00:00Z |
dewey-sort |
3551.468 |
id |
1804446297 |
language_de |
englisch |
standort_str_mv |
--%%-- |
dewey-ones |
551 - Geology, hydrology & meteorology 550 - Earth sciences |
delete_txt_mv |
keep |
author_role |
aut |
publishPlace |
Bremen |
last_changed_iln_str_mv |
20@12-10-24 21@27-05-22 22@12-10-24 23@12-10-24 30@12-10-24 40@12-10-24 60@12-10-24 63@12-10-24 70@12-10-24 105@12-10-24 110@12-10-24 132@12-10-24 151@12-10-24 161@12-10-24 293@12-10-24 370@12-10-24 2403@06-09-22 |
illustrated |
Not Illustrated |
topic_title |
551.468 DE-101 550 DE-101 21 00 DE-46 00 Universität Bremen Sediment dynamics in a transboundary mangrove habitat a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya Amon Kibiwot Kimeli Kenya Tanzania Vanga transboundary sediments sedimentation mangroves Sea-level rise accretion provenance modeling conservation Umba River geochemical analysis mineralogy |
format_facet |
Elektronische Bücher Bücher Elektronische Ressource Hochschulschriften |
standort_txtP_mv |
--%%-- |
signature |
--%%-- |
signature_str_mv |
--%%-- |
isfreeaccess_txt |
true |
normlinkwithrole_str_mv |
(DE-588)4113937-9@@655@@ (DE-588)12027941X@@dgs@@ (DE-588)172999847@@dgs@@ (DE-588)2001386-3@@dgg@@ (DE-588)4008135-7@@uvp@@ |
ctrlnum |
(DE-627)1804446297 (DE-599)KXP1804446297 (OCoLC)1321074893 |
title_full |
Sediment dynamics in a transboundary mangrove habitat a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya Amon Kibiwot Kimeli |
author_sort |
Kimeli, Amon Kibiwot |
isOA_bool |
true |
genre |
Hochschulschrift (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 gnd-content |
publishDateSort |
2022 |
selectkey |
20:x 21:z 22:x 23:x 30:z 40:x 60:z 63:x 70:z 105:z 110:x 132:x 151:z 161:z 293:z 370:x 2403:l |
format_se |
Elektronische Bücher |
countryofpublication_str_mv |
XA-DE-HB |
author-letter |
Kimeli, Amon Kibiwot |
title_sub |
a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya |
doi_str_mv |
10.26092/elib/1546 |
dewey-full |
551.468 550 |
author2-role |
akademischer betreuerin Grad-verleihende Institution |
title_sort |
sediment dynamics in a transboundary mangrove habitata perspective of sediment sources and sedimentation in the vanga estuary, kenya |
title_auth |
Sediment dynamics in a transboundary mangrove habitat a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya |
abstract |
Mangroves are essential providers of environmental, economic, and ecological ecosystem services. Mangroves of Vanga occur in the most southerly coastal area of Kenya. They transcend the Kenya-Tanzania border and receive fresh water and particulate materials from the transboundary Umba River. Consequently, they provide a unique opportunity to study system dynamics borne of both anthropogenic and natural disturbances. Cognizant of the universal threat that mangroves face with respect to sea-level rise (SLR), the need to understand sediments dynamics within the Vanga estuary is vital for their conservation and management. This is because sedimentation has been identified as one of the factors that will allow mangroves to mitigate and modulate the effects of SLR. However, our knowledge and understanding of the sediment dynamics in the Vanga Estuary are limited. Consequently, it jeopardizes plans on mitigation and adaptive measures to be undertaken in the face of SLR and other resource management issues. We hypothesized that most of the Vanga Estuary sediments are sourced from the Umba River catchment, with minimal contribution from tidal and in-situ production. Therefore, the overall aim of this doctoral study is to investigate the influence of the transboundary Umba River on the connectivity of downstream coastal habitats and the terrestrial catchment. To achieve the objectives of this study, we evaluated 1) the geochemical and mineralogical composition of the Umba River sediments 2) analyzed and modeled elemental carbon (C), nitrogen (N), and their stable isotopes to determine the possible sources of sediment organic matter delivered to the Vanga estuary and 3) measured current sedimentation rates in the Vanga estuary to evaluate the possible response of Vanga mangroves to current and future rates of SLR. First, the Umba River sediments showed similar source geology along the river’s course from the source to its mouth in the Vanga Estuary. This is reflected by the similarity in the mineralogy and the chemical composition of sediments evident by the dominant mafic to felsic minerals discernible in both upstream and downstream sediments. The Umba River sediments also exhibit a moderate to high Chemical Index of Alteration (CIA) attributed to the variation from the dry to cold climate upstream (near the source) and humid climate further downstream. Secondly, based on the combined evaluation of elemental carbon (C) and nitrogen (N), C/N ratio, carbon, and nitrogen isotopes, together with the results of the applied Stable Isotope Mixing Model, a mixed source of sediment organic matter in the Vanga Estuary was observed. The mixing is attributed to the daily hydrodynamic flushing and bioturbation under the mangrove canopy. The model results also indicated that riverine organic matter was the dominant source with ~60% contribution to the total sediment organic matter. It validated our hypothesis on the influence of the Umba River on the Vanga Estuary. With sediment organic matter as a proxy, we conclude that the terrestrial catchment and Vanga Estuary are connected, with Umba River supplying both freshwater and sediments. Finally, having determined the connectivity of the Umba River catchment, downstream mangrove habitat in Vanga, and the consequent sediment input, we further evaluated the fate of the sediments in terms of deposition and mangrove surface elevation. Our data indicate that mangrove surface elevation is experiencing shallow subsidence of up to -15 mm/yr. At the same time, sediments also accreted by a rate of up to 9 mm/yr on the mangrove surface. This accretion rate exceeds the current rates of local SLR (3.8 mm/yr) and global SLR (3.1 mm/yr). The mangroves of Vanga would therefore be able to keep pace and persist under the current rates of SLR. However, accelerated SLR would marginally outpace the net mangrove surface elevation in Vanga. Our study implies that adaptive measures on mangrove conservation and management in Vanga need to capture the complex intra- and interhabitat sediment dynamics and interactions. This would include policy interventions through comprehensive and integrated cross-border resource management and governance. |
abstractGer |
Mangroves are essential providers of environmental, economic, and ecological ecosystem services. Mangroves of Vanga occur in the most southerly coastal area of Kenya. They transcend the Kenya-Tanzania border and receive fresh water and particulate materials from the transboundary Umba River. Consequently, they provide a unique opportunity to study system dynamics borne of both anthropogenic and natural disturbances. Cognizant of the universal threat that mangroves face with respect to sea-level rise (SLR), the need to understand sediments dynamics within the Vanga estuary is vital for their conservation and management. This is because sedimentation has been identified as one of the factors that will allow mangroves to mitigate and modulate the effects of SLR. However, our knowledge and understanding of the sediment dynamics in the Vanga Estuary are limited. Consequently, it jeopardizes plans on mitigation and adaptive measures to be undertaken in the face of SLR and other resource management issues. We hypothesized that most of the Vanga Estuary sediments are sourced from the Umba River catchment, with minimal contribution from tidal and in-situ production. Therefore, the overall aim of this doctoral study is to investigate the influence of the transboundary Umba River on the connectivity of downstream coastal habitats and the terrestrial catchment. To achieve the objectives of this study, we evaluated 1) the geochemical and mineralogical composition of the Umba River sediments 2) analyzed and modeled elemental carbon (C), nitrogen (N), and their stable isotopes to determine the possible sources of sediment organic matter delivered to the Vanga estuary and 3) measured current sedimentation rates in the Vanga estuary to evaluate the possible response of Vanga mangroves to current and future rates of SLR. First, the Umba River sediments showed similar source geology along the river’s course from the source to its mouth in the Vanga Estuary. This is reflected by the similarity in the mineralogy and the chemical composition of sediments evident by the dominant mafic to felsic minerals discernible in both upstream and downstream sediments. The Umba River sediments also exhibit a moderate to high Chemical Index of Alteration (CIA) attributed to the variation from the dry to cold climate upstream (near the source) and humid climate further downstream. Secondly, based on the combined evaluation of elemental carbon (C) and nitrogen (N), C/N ratio, carbon, and nitrogen isotopes, together with the results of the applied Stable Isotope Mixing Model, a mixed source of sediment organic matter in the Vanga Estuary was observed. The mixing is attributed to the daily hydrodynamic flushing and bioturbation under the mangrove canopy. The model results also indicated that riverine organic matter was the dominant source with ~60% contribution to the total sediment organic matter. It validated our hypothesis on the influence of the Umba River on the Vanga Estuary. With sediment organic matter as a proxy, we conclude that the terrestrial catchment and Vanga Estuary are connected, with Umba River supplying both freshwater and sediments. Finally, having determined the connectivity of the Umba River catchment, downstream mangrove habitat in Vanga, and the consequent sediment input, we further evaluated the fate of the sediments in terms of deposition and mangrove surface elevation. Our data indicate that mangrove surface elevation is experiencing shallow subsidence of up to -15 mm/yr. At the same time, sediments also accreted by a rate of up to 9 mm/yr on the mangrove surface. This accretion rate exceeds the current rates of local SLR (3.8 mm/yr) and global SLR (3.1 mm/yr). The mangroves of Vanga would therefore be able to keep pace and persist under the current rates of SLR. However, accelerated SLR would marginally outpace the net mangrove surface elevation in Vanga. Our study implies that adaptive measures on mangrove conservation and management in Vanga need to capture the complex intra- and interhabitat sediment dynamics and interactions. This would include policy interventions through comprehensive and integrated cross-border resource management and governance. |
abstract_unstemmed |
Mangroves are essential providers of environmental, economic, and ecological ecosystem services. Mangroves of Vanga occur in the most southerly coastal area of Kenya. They transcend the Kenya-Tanzania border and receive fresh water and particulate materials from the transboundary Umba River. Consequently, they provide a unique opportunity to study system dynamics borne of both anthropogenic and natural disturbances. Cognizant of the universal threat that mangroves face with respect to sea-level rise (SLR), the need to understand sediments dynamics within the Vanga estuary is vital for their conservation and management. This is because sedimentation has been identified as one of the factors that will allow mangroves to mitigate and modulate the effects of SLR. However, our knowledge and understanding of the sediment dynamics in the Vanga Estuary are limited. Consequently, it jeopardizes plans on mitigation and adaptive measures to be undertaken in the face of SLR and other resource management issues. We hypothesized that most of the Vanga Estuary sediments are sourced from the Umba River catchment, with minimal contribution from tidal and in-situ production. Therefore, the overall aim of this doctoral study is to investigate the influence of the transboundary Umba River on the connectivity of downstream coastal habitats and the terrestrial catchment. To achieve the objectives of this study, we evaluated 1) the geochemical and mineralogical composition of the Umba River sediments 2) analyzed and modeled elemental carbon (C), nitrogen (N), and their stable isotopes to determine the possible sources of sediment organic matter delivered to the Vanga estuary and 3) measured current sedimentation rates in the Vanga estuary to evaluate the possible response of Vanga mangroves to current and future rates of SLR. First, the Umba River sediments showed similar source geology along the river’s course from the source to its mouth in the Vanga Estuary. This is reflected by the similarity in the mineralogy and the chemical composition of sediments evident by the dominant mafic to felsic minerals discernible in both upstream and downstream sediments. The Umba River sediments also exhibit a moderate to high Chemical Index of Alteration (CIA) attributed to the variation from the dry to cold climate upstream (near the source) and humid climate further downstream. Secondly, based on the combined evaluation of elemental carbon (C) and nitrogen (N), C/N ratio, carbon, and nitrogen isotopes, together with the results of the applied Stable Isotope Mixing Model, a mixed source of sediment organic matter in the Vanga Estuary was observed. The mixing is attributed to the daily hydrodynamic flushing and bioturbation under the mangrove canopy. The model results also indicated that riverine organic matter was the dominant source with ~60% contribution to the total sediment organic matter. It validated our hypothesis on the influence of the Umba River on the Vanga Estuary. With sediment organic matter as a proxy, we conclude that the terrestrial catchment and Vanga Estuary are connected, with Umba River supplying both freshwater and sediments. Finally, having determined the connectivity of the Umba River catchment, downstream mangrove habitat in Vanga, and the consequent sediment input, we further evaluated the fate of the sediments in terms of deposition and mangrove surface elevation. Our data indicate that mangrove surface elevation is experiencing shallow subsidence of up to -15 mm/yr. At the same time, sediments also accreted by a rate of up to 9 mm/yr on the mangrove surface. This accretion rate exceeds the current rates of local SLR (3.8 mm/yr) and global SLR (3.1 mm/yr). The mangroves of Vanga would therefore be able to keep pace and persist under the current rates of SLR. However, accelerated SLR would marginally outpace the net mangrove surface elevation in Vanga. Our study implies that adaptive measures on mangrove conservation and management in Vanga need to capture the complex intra- and interhabitat sediment dynamics and interactions. This would include policy interventions through comprehensive and integrated cross-border resource management and governance. |
url |
https://doi.org/10.26092/elib/1546 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 https://d-nb.info/1338949020/34 https://media.suub.uni-bremen.de/handle/elib/5941 |
author2 |
Westphal, Hildegard 1968- Hinderer, Matthias 1961- Universität Bremen |
author2Str |
Westphal, Hildegard 1968- Hinderer, Matthias 1961- Universität Bremen |
ppnlink |
1804448133 |
mediatype_str_mv |
c |
isOA_txt |
true |
hochschulschrift_bool |
true |
author2_role |
dgs dgs |
author_variant |
a k k ak akk |
hierarchy_sort_str |
2022 |
allfields |
urn:nbn:de:gbv:46-elib59411 urn 10.26092/elib/1546 doi (DE-627)1804446297 (DE-599)KXP1804446297 (OCoLC)1321074893 DE-627 ger DE-627 rda eng XA-DE-HB 551.468 DE-101 550 DE-101 Kimeli, Amon Kibiwot verfasserin (orcid)0000-0002-0798-7624 aut Sediment dynamics in a transboundary mangrove habitat a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya Amon Kibiwot Kimeli Bremen 2022 1 Online-Ressource (xxii, 144, XXXV Seiten) Illustrationen Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Dissertation Universität Bremen 2022 Mangroves are essential providers of environmental, economic, and ecological ecosystem services. Mangroves of Vanga occur in the most southerly coastal area of Kenya. They transcend the Kenya-Tanzania border and receive fresh water and particulate materials from the transboundary Umba River. Consequently, they provide a unique opportunity to study system dynamics borne of both anthropogenic and natural disturbances. Cognizant of the universal threat that mangroves face with respect to sea-level rise (SLR), the need to understand sediments dynamics within the Vanga estuary is vital for their conservation and management. This is because sedimentation has been identified as one of the factors that will allow mangroves to mitigate and modulate the effects of SLR. However, our knowledge and understanding of the sediment dynamics in the Vanga Estuary are limited. Consequently, it jeopardizes plans on mitigation and adaptive measures to be undertaken in the face of SLR and other resource management issues. We hypothesized that most of the Vanga Estuary sediments are sourced from the Umba River catchment, with minimal contribution from tidal and in-situ production. Therefore, the overall aim of this doctoral study is to investigate the influence of the transboundary Umba River on the connectivity of downstream coastal habitats and the terrestrial catchment. To achieve the objectives of this study, we evaluated 1) the geochemical and mineralogical composition of the Umba River sediments 2) analyzed and modeled elemental carbon (C), nitrogen (N), and their stable isotopes to determine the possible sources of sediment organic matter delivered to the Vanga estuary and 3) measured current sedimentation rates in the Vanga estuary to evaluate the possible response of Vanga mangroves to current and future rates of SLR. First, the Umba River sediments showed similar source geology along the river’s course from the source to its mouth in the Vanga Estuary. This is reflected by the similarity in the mineralogy and the chemical composition of sediments evident by the dominant mafic to felsic minerals discernible in both upstream and downstream sediments. The Umba River sediments also exhibit a moderate to high Chemical Index of Alteration (CIA) attributed to the variation from the dry to cold climate upstream (near the source) and humid climate further downstream. Secondly, based on the combined evaluation of elemental carbon (C) and nitrogen (N), C/N ratio, carbon, and nitrogen isotopes, together with the results of the applied Stable Isotope Mixing Model, a mixed source of sediment organic matter in the Vanga Estuary was observed. The mixing is attributed to the daily hydrodynamic flushing and bioturbation under the mangrove canopy. The model results also indicated that riverine organic matter was the dominant source with ~60% contribution to the total sediment organic matter. It validated our hypothesis on the influence of the Umba River on the Vanga Estuary. With sediment organic matter as a proxy, we conclude that the terrestrial catchment and Vanga Estuary are connected, with Umba River supplying both freshwater and sediments. Finally, having determined the connectivity of the Umba River catchment, downstream mangrove habitat in Vanga, and the consequent sediment input, we further evaluated the fate of the sediments in terms of deposition and mangrove surface elevation. Our data indicate that mangrove surface elevation is experiencing shallow subsidence of up to -15 mm/yr. At the same time, sediments also accreted by a rate of up to 9 mm/yr on the mangrove surface. This accretion rate exceeds the current rates of local SLR (3.8 mm/yr) and global SLR (3.1 mm/yr). The mangroves of Vanga would therefore be able to keep pace and persist under the current rates of SLR. However, accelerated SLR would marginally outpace the net mangrove surface elevation in Vanga. Our study implies that adaptive measures on mangrove conservation and management in Vanga need to capture the complex intra- and interhabitat sediment dynamics and interactions. This would include policy interventions through comprehensive and integrated cross-border resource management and governance. Archivierung/Langzeitarchivierung gewährleistet PEHB XA-DE-HB pdager DE-46 Kenya Tanzania Vanga transboundary sediments sedimentation mangroves Sea-level rise accretion provenance modeling conservation Umba River geochemical analysis mineralogy Hochschulschrift (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 gnd-content Westphal, Hildegard 1968- akademischer betreuerin (DE-588)12027941X (DE-627)080573355 (DE-576)292134827 dgs Hinderer, Matthias 1961- akademischer betreuerin (DE-588)172999847 (DE-627)697925285 (DE-576)133853098 dgs Universität Bremen Grad-verleihende Institution (DE-588)2001386-3 (DE-627)101380429 (DE-576)191575038 dgg Bremen (DE-588)4008135-7 (DE-627)106369636 (DE-576)208874569 uvp Erscheint auch als Druck-Ausgabe Kimeli, Amon Kibiwot Sediment dynamics in a transboundary mangrove habitat Bremen, 2022 xxii, 144, XXXV Seiten (DE-627)1804448133 https://doi.org/10.26092/elib/1546 Resolving-System kostenfrei https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 Resolving-System kostenfrei https://d-nb.info/1338949020/34 Langzeitarchivierung Nationalbibliothek kostenfrei https://media.suub.uni-bremen.de/handle/elib/5941 Verlag kostenfrei GBV-ODiss GBV_ILN_20 ISIL_DE-84 SYSFLAG_1 GBV_KXP GBV_ILN_21 ISIL_DE-46 GBV_ILN_22 ISIL_DE-18 GBV_ILN_23 ISIL_DE-830 GBV_ILN_30 ISIL_DE-104 GBV_ILN_40 ISIL_DE-7 GBV_ILN_60 ISIL_DE-705 GBV_ILN_63 ISIL_DE-Wim2 GBV_ILN_70 ISIL_DE-89 GBV_ILN_105 ISIL_DE-841 GBV_ILN_110 ISIL_DE-Luen4 GBV_ILN_132 ISIL_DE-959 GBV_ILN_151 ISIL_DE-546 GBV_ILN_161 ISIL_DE-960 GBV_ILN_293 ISIL_DE-960-3 GBV_ILN_370 ISIL_DE-1373 GBV_ILN_2403 ISIL_DE-LFER DSpace BO 20 01 0084 4593077702 x 12-10-24 21 01 0046 4139873809 ebook_2022_dissbremen Kostenloser Zugriff zza 27-05-22 22 01 0018 4593180473 SUBolrd xu 12-10-24 23 01 0830 4593229472 olr-d x 12-10-24 30 01 0104 4593276462 z 12-10-24 40 01 0007 4593310067 xsn 12-10-24 60 01 0705 4593368014 OLRD z 12-10-24 63 01 3401 4593423503 ORD x 12-10-24 70 01 0089 459347499X z 12-10-24 105 01 0841 4593866405 z 12-10-24 110 01 3110 4593578604 x 12-10-24 132 01 0959 459362231X OLR-DISS x 12-10-24 151 01 0546 4593665264 OLR-ODISS z 12-10-24 161 01 0960 4593688345 ORD z 12-10-24 293 01 3293 4593816289 ORD z 12-10-24 370 01 4370 4593853826 x 12-10-24 2403 01 DE-LFER 4185162596 00 --%%-- --%%-- n --%%-- l01 06-09-22 20 01 0084 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 21 01 0046 https://doi.org/10.26092/elib/1546 LF 22 01 0018 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 23 01 0830 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 30 01 0104 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 40 01 0007 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 60 01 0705 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 63 01 3401 E-Book https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 LF 70 01 0089 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 105 01 0841 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 110 01 3110 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 132 01 0959 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 151 01 0546 Volltext https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 161 01 0960 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 293 01 3293 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 370 01 4370 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 2403 01 DE-LFER https://doi.org/10.26092/elib/1546 21 00 DE-46 00 Universität Bremen 60 01 0705 10 ho 20 01 0084 OLRD 110 01 3110 OLRD 370 01 4370 OLRD 21 01 0046 ebook_2022_dissbremen 22 01 0018 SUBolrd 23 01 0830 olr-d 60 01 0705 OLRD 63 01 3401 ORD 132 01 0959 OLR-DISS 151 01 0546 OLR-ODISS 161 01 0960 ORD 293 01 3293 ORD 23 01 0830 2024-10-12 10:31:16 |
spelling |
urn:nbn:de:gbv:46-elib59411 urn 10.26092/elib/1546 doi (DE-627)1804446297 (DE-599)KXP1804446297 (OCoLC)1321074893 DE-627 ger DE-627 rda eng XA-DE-HB 551.468 DE-101 550 DE-101 Kimeli, Amon Kibiwot verfasserin (orcid)0000-0002-0798-7624 aut Sediment dynamics in a transboundary mangrove habitat a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya Amon Kibiwot Kimeli Bremen 2022 1 Online-Ressource (xxii, 144, XXXV Seiten) Illustrationen Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Dissertation Universität Bremen 2022 Mangroves are essential providers of environmental, economic, and ecological ecosystem services. Mangroves of Vanga occur in the most southerly coastal area of Kenya. They transcend the Kenya-Tanzania border and receive fresh water and particulate materials from the transboundary Umba River. Consequently, they provide a unique opportunity to study system dynamics borne of both anthropogenic and natural disturbances. Cognizant of the universal threat that mangroves face with respect to sea-level rise (SLR), the need to understand sediments dynamics within the Vanga estuary is vital for their conservation and management. This is because sedimentation has been identified as one of the factors that will allow mangroves to mitigate and modulate the effects of SLR. However, our knowledge and understanding of the sediment dynamics in the Vanga Estuary are limited. Consequently, it jeopardizes plans on mitigation and adaptive measures to be undertaken in the face of SLR and other resource management issues. We hypothesized that most of the Vanga Estuary sediments are sourced from the Umba River catchment, with minimal contribution from tidal and in-situ production. Therefore, the overall aim of this doctoral study is to investigate the influence of the transboundary Umba River on the connectivity of downstream coastal habitats and the terrestrial catchment. To achieve the objectives of this study, we evaluated 1) the geochemical and mineralogical composition of the Umba River sediments 2) analyzed and modeled elemental carbon (C), nitrogen (N), and their stable isotopes to determine the possible sources of sediment organic matter delivered to the Vanga estuary and 3) measured current sedimentation rates in the Vanga estuary to evaluate the possible response of Vanga mangroves to current and future rates of SLR. First, the Umba River sediments showed similar source geology along the river’s course from the source to its mouth in the Vanga Estuary. This is reflected by the similarity in the mineralogy and the chemical composition of sediments evident by the dominant mafic to felsic minerals discernible in both upstream and downstream sediments. The Umba River sediments also exhibit a moderate to high Chemical Index of Alteration (CIA) attributed to the variation from the dry to cold climate upstream (near the source) and humid climate further downstream. Secondly, based on the combined evaluation of elemental carbon (C) and nitrogen (N), C/N ratio, carbon, and nitrogen isotopes, together with the results of the applied Stable Isotope Mixing Model, a mixed source of sediment organic matter in the Vanga Estuary was observed. The mixing is attributed to the daily hydrodynamic flushing and bioturbation under the mangrove canopy. The model results also indicated that riverine organic matter was the dominant source with ~60% contribution to the total sediment organic matter. It validated our hypothesis on the influence of the Umba River on the Vanga Estuary. With sediment organic matter as a proxy, we conclude that the terrestrial catchment and Vanga Estuary are connected, with Umba River supplying both freshwater and sediments. Finally, having determined the connectivity of the Umba River catchment, downstream mangrove habitat in Vanga, and the consequent sediment input, we further evaluated the fate of the sediments in terms of deposition and mangrove surface elevation. Our data indicate that mangrove surface elevation is experiencing shallow subsidence of up to -15 mm/yr. At the same time, sediments also accreted by a rate of up to 9 mm/yr on the mangrove surface. This accretion rate exceeds the current rates of local SLR (3.8 mm/yr) and global SLR (3.1 mm/yr). The mangroves of Vanga would therefore be able to keep pace and persist under the current rates of SLR. However, accelerated SLR would marginally outpace the net mangrove surface elevation in Vanga. Our study implies that adaptive measures on mangrove conservation and management in Vanga need to capture the complex intra- and interhabitat sediment dynamics and interactions. This would include policy interventions through comprehensive and integrated cross-border resource management and governance. Archivierung/Langzeitarchivierung gewährleistet PEHB XA-DE-HB pdager DE-46 Kenya Tanzania Vanga transboundary sediments sedimentation mangroves Sea-level rise accretion provenance modeling conservation Umba River geochemical analysis mineralogy Hochschulschrift (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 gnd-content Westphal, Hildegard 1968- akademischer betreuerin (DE-588)12027941X (DE-627)080573355 (DE-576)292134827 dgs Hinderer, Matthias 1961- akademischer betreuerin (DE-588)172999847 (DE-627)697925285 (DE-576)133853098 dgs Universität Bremen Grad-verleihende Institution (DE-588)2001386-3 (DE-627)101380429 (DE-576)191575038 dgg Bremen (DE-588)4008135-7 (DE-627)106369636 (DE-576)208874569 uvp Erscheint auch als Druck-Ausgabe Kimeli, Amon Kibiwot Sediment dynamics in a transboundary mangrove habitat Bremen, 2022 xxii, 144, XXXV Seiten (DE-627)1804448133 https://doi.org/10.26092/elib/1546 Resolving-System kostenfrei https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 Resolving-System kostenfrei https://d-nb.info/1338949020/34 Langzeitarchivierung Nationalbibliothek kostenfrei https://media.suub.uni-bremen.de/handle/elib/5941 Verlag kostenfrei GBV-ODiss GBV_ILN_20 ISIL_DE-84 SYSFLAG_1 GBV_KXP GBV_ILN_21 ISIL_DE-46 GBV_ILN_22 ISIL_DE-18 GBV_ILN_23 ISIL_DE-830 GBV_ILN_30 ISIL_DE-104 GBV_ILN_40 ISIL_DE-7 GBV_ILN_60 ISIL_DE-705 GBV_ILN_63 ISIL_DE-Wim2 GBV_ILN_70 ISIL_DE-89 GBV_ILN_105 ISIL_DE-841 GBV_ILN_110 ISIL_DE-Luen4 GBV_ILN_132 ISIL_DE-959 GBV_ILN_151 ISIL_DE-546 GBV_ILN_161 ISIL_DE-960 GBV_ILN_293 ISIL_DE-960-3 GBV_ILN_370 ISIL_DE-1373 GBV_ILN_2403 ISIL_DE-LFER DSpace BO 20 01 0084 4593077702 x 12-10-24 21 01 0046 4139873809 ebook_2022_dissbremen Kostenloser Zugriff zza 27-05-22 22 01 0018 4593180473 SUBolrd xu 12-10-24 23 01 0830 4593229472 olr-d x 12-10-24 30 01 0104 4593276462 z 12-10-24 40 01 0007 4593310067 xsn 12-10-24 60 01 0705 4593368014 OLRD z 12-10-24 63 01 3401 4593423503 ORD x 12-10-24 70 01 0089 459347499X z 12-10-24 105 01 0841 4593866405 z 12-10-24 110 01 3110 4593578604 x 12-10-24 132 01 0959 459362231X OLR-DISS x 12-10-24 151 01 0546 4593665264 OLR-ODISS z 12-10-24 161 01 0960 4593688345 ORD z 12-10-24 293 01 3293 4593816289 ORD z 12-10-24 370 01 4370 4593853826 x 12-10-24 2403 01 DE-LFER 4185162596 00 --%%-- --%%-- n --%%-- l01 06-09-22 20 01 0084 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 21 01 0046 https://doi.org/10.26092/elib/1546 LF 22 01 0018 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 23 01 0830 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 30 01 0104 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 40 01 0007 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 60 01 0705 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 63 01 3401 E-Book https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 LF 70 01 0089 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 105 01 0841 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 110 01 3110 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 132 01 0959 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 151 01 0546 Volltext https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 161 01 0960 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 293 01 3293 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 370 01 4370 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 2403 01 DE-LFER https://doi.org/10.26092/elib/1546 21 00 DE-46 00 Universität Bremen 60 01 0705 10 ho 20 01 0084 OLRD 110 01 3110 OLRD 370 01 4370 OLRD 21 01 0046 ebook_2022_dissbremen 22 01 0018 SUBolrd 23 01 0830 olr-d 60 01 0705 OLRD 63 01 3401 ORD 132 01 0959 OLR-DISS 151 01 0546 OLR-ODISS 161 01 0960 ORD 293 01 3293 ORD 23 01 0830 2024-10-12 10:31:16 |
allfields_unstemmed |
urn:nbn:de:gbv:46-elib59411 urn 10.26092/elib/1546 doi (DE-627)1804446297 (DE-599)KXP1804446297 (OCoLC)1321074893 DE-627 ger DE-627 rda eng XA-DE-HB 551.468 DE-101 550 DE-101 Kimeli, Amon Kibiwot verfasserin (orcid)0000-0002-0798-7624 aut Sediment dynamics in a transboundary mangrove habitat a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya Amon Kibiwot Kimeli Bremen 2022 1 Online-Ressource (xxii, 144, XXXV Seiten) Illustrationen Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Dissertation Universität Bremen 2022 Mangroves are essential providers of environmental, economic, and ecological ecosystem services. Mangroves of Vanga occur in the most southerly coastal area of Kenya. They transcend the Kenya-Tanzania border and receive fresh water and particulate materials from the transboundary Umba River. Consequently, they provide a unique opportunity to study system dynamics borne of both anthropogenic and natural disturbances. Cognizant of the universal threat that mangroves face with respect to sea-level rise (SLR), the need to understand sediments dynamics within the Vanga estuary is vital for their conservation and management. This is because sedimentation has been identified as one of the factors that will allow mangroves to mitigate and modulate the effects of SLR. However, our knowledge and understanding of the sediment dynamics in the Vanga Estuary are limited. Consequently, it jeopardizes plans on mitigation and adaptive measures to be undertaken in the face of SLR and other resource management issues. We hypothesized that most of the Vanga Estuary sediments are sourced from the Umba River catchment, with minimal contribution from tidal and in-situ production. Therefore, the overall aim of this doctoral study is to investigate the influence of the transboundary Umba River on the connectivity of downstream coastal habitats and the terrestrial catchment. To achieve the objectives of this study, we evaluated 1) the geochemical and mineralogical composition of the Umba River sediments 2) analyzed and modeled elemental carbon (C), nitrogen (N), and their stable isotopes to determine the possible sources of sediment organic matter delivered to the Vanga estuary and 3) measured current sedimentation rates in the Vanga estuary to evaluate the possible response of Vanga mangroves to current and future rates of SLR. First, the Umba River sediments showed similar source geology along the river’s course from the source to its mouth in the Vanga Estuary. This is reflected by the similarity in the mineralogy and the chemical composition of sediments evident by the dominant mafic to felsic minerals discernible in both upstream and downstream sediments. The Umba River sediments also exhibit a moderate to high Chemical Index of Alteration (CIA) attributed to the variation from the dry to cold climate upstream (near the source) and humid climate further downstream. Secondly, based on the combined evaluation of elemental carbon (C) and nitrogen (N), C/N ratio, carbon, and nitrogen isotopes, together with the results of the applied Stable Isotope Mixing Model, a mixed source of sediment organic matter in the Vanga Estuary was observed. The mixing is attributed to the daily hydrodynamic flushing and bioturbation under the mangrove canopy. The model results also indicated that riverine organic matter was the dominant source with ~60% contribution to the total sediment organic matter. It validated our hypothesis on the influence of the Umba River on the Vanga Estuary. With sediment organic matter as a proxy, we conclude that the terrestrial catchment and Vanga Estuary are connected, with Umba River supplying both freshwater and sediments. Finally, having determined the connectivity of the Umba River catchment, downstream mangrove habitat in Vanga, and the consequent sediment input, we further evaluated the fate of the sediments in terms of deposition and mangrove surface elevation. Our data indicate that mangrove surface elevation is experiencing shallow subsidence of up to -15 mm/yr. At the same time, sediments also accreted by a rate of up to 9 mm/yr on the mangrove surface. This accretion rate exceeds the current rates of local SLR (3.8 mm/yr) and global SLR (3.1 mm/yr). The mangroves of Vanga would therefore be able to keep pace and persist under the current rates of SLR. However, accelerated SLR would marginally outpace the net mangrove surface elevation in Vanga. Our study implies that adaptive measures on mangrove conservation and management in Vanga need to capture the complex intra- and interhabitat sediment dynamics and interactions. This would include policy interventions through comprehensive and integrated cross-border resource management and governance. Archivierung/Langzeitarchivierung gewährleistet PEHB XA-DE-HB pdager DE-46 Kenya Tanzania Vanga transboundary sediments sedimentation mangroves Sea-level rise accretion provenance modeling conservation Umba River geochemical analysis mineralogy Hochschulschrift (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 gnd-content Westphal, Hildegard 1968- akademischer betreuerin (DE-588)12027941X (DE-627)080573355 (DE-576)292134827 dgs Hinderer, Matthias 1961- akademischer betreuerin (DE-588)172999847 (DE-627)697925285 (DE-576)133853098 dgs Universität Bremen Grad-verleihende Institution (DE-588)2001386-3 (DE-627)101380429 (DE-576)191575038 dgg Bremen (DE-588)4008135-7 (DE-627)106369636 (DE-576)208874569 uvp Erscheint auch als Druck-Ausgabe Kimeli, Amon Kibiwot Sediment dynamics in a transboundary mangrove habitat Bremen, 2022 xxii, 144, XXXV Seiten (DE-627)1804448133 https://doi.org/10.26092/elib/1546 Resolving-System kostenfrei https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 Resolving-System kostenfrei https://d-nb.info/1338949020/34 Langzeitarchivierung Nationalbibliothek kostenfrei https://media.suub.uni-bremen.de/handle/elib/5941 Verlag kostenfrei GBV-ODiss GBV_ILN_20 ISIL_DE-84 SYSFLAG_1 GBV_KXP GBV_ILN_21 ISIL_DE-46 GBV_ILN_22 ISIL_DE-18 GBV_ILN_23 ISIL_DE-830 GBV_ILN_30 ISIL_DE-104 GBV_ILN_40 ISIL_DE-7 GBV_ILN_60 ISIL_DE-705 GBV_ILN_63 ISIL_DE-Wim2 GBV_ILN_70 ISIL_DE-89 GBV_ILN_105 ISIL_DE-841 GBV_ILN_110 ISIL_DE-Luen4 GBV_ILN_132 ISIL_DE-959 GBV_ILN_151 ISIL_DE-546 GBV_ILN_161 ISIL_DE-960 GBV_ILN_293 ISIL_DE-960-3 GBV_ILN_370 ISIL_DE-1373 GBV_ILN_2403 ISIL_DE-LFER DSpace BO 20 01 0084 4593077702 x 12-10-24 21 01 0046 4139873809 ebook_2022_dissbremen Kostenloser Zugriff zza 27-05-22 22 01 0018 4593180473 SUBolrd xu 12-10-24 23 01 0830 4593229472 olr-d x 12-10-24 30 01 0104 4593276462 z 12-10-24 40 01 0007 4593310067 xsn 12-10-24 60 01 0705 4593368014 OLRD z 12-10-24 63 01 3401 4593423503 ORD x 12-10-24 70 01 0089 459347499X z 12-10-24 105 01 0841 4593866405 z 12-10-24 110 01 3110 4593578604 x 12-10-24 132 01 0959 459362231X OLR-DISS x 12-10-24 151 01 0546 4593665264 OLR-ODISS z 12-10-24 161 01 0960 4593688345 ORD z 12-10-24 293 01 3293 4593816289 ORD z 12-10-24 370 01 4370 4593853826 x 12-10-24 2403 01 DE-LFER 4185162596 00 --%%-- --%%-- n --%%-- l01 06-09-22 20 01 0084 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 21 01 0046 https://doi.org/10.26092/elib/1546 LF 22 01 0018 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 23 01 0830 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 30 01 0104 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 40 01 0007 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 60 01 0705 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 63 01 3401 E-Book https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 LF 70 01 0089 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 105 01 0841 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 110 01 3110 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 132 01 0959 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 151 01 0546 Volltext https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 161 01 0960 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 293 01 3293 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 370 01 4370 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 2403 01 DE-LFER https://doi.org/10.26092/elib/1546 21 00 DE-46 00 Universität Bremen 60 01 0705 10 ho 20 01 0084 OLRD 110 01 3110 OLRD 370 01 4370 OLRD 21 01 0046 ebook_2022_dissbremen 22 01 0018 SUBolrd 23 01 0830 olr-d 60 01 0705 OLRD 63 01 3401 ORD 132 01 0959 OLR-DISS 151 01 0546 OLR-ODISS 161 01 0960 ORD 293 01 3293 ORD 23 01 0830 2024-10-12 10:31:16 |
allfieldsGer |
urn:nbn:de:gbv:46-elib59411 urn 10.26092/elib/1546 doi (DE-627)1804446297 (DE-599)KXP1804446297 (OCoLC)1321074893 DE-627 ger DE-627 rda eng XA-DE-HB 551.468 DE-101 550 DE-101 Kimeli, Amon Kibiwot verfasserin (orcid)0000-0002-0798-7624 aut Sediment dynamics in a transboundary mangrove habitat a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya Amon Kibiwot Kimeli Bremen 2022 1 Online-Ressource (xxii, 144, XXXV Seiten) Illustrationen Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Dissertation Universität Bremen 2022 Mangroves are essential providers of environmental, economic, and ecological ecosystem services. Mangroves of Vanga occur in the most southerly coastal area of Kenya. They transcend the Kenya-Tanzania border and receive fresh water and particulate materials from the transboundary Umba River. Consequently, they provide a unique opportunity to study system dynamics borne of both anthropogenic and natural disturbances. Cognizant of the universal threat that mangroves face with respect to sea-level rise (SLR), the need to understand sediments dynamics within the Vanga estuary is vital for their conservation and management. This is because sedimentation has been identified as one of the factors that will allow mangroves to mitigate and modulate the effects of SLR. However, our knowledge and understanding of the sediment dynamics in the Vanga Estuary are limited. Consequently, it jeopardizes plans on mitigation and adaptive measures to be undertaken in the face of SLR and other resource management issues. We hypothesized that most of the Vanga Estuary sediments are sourced from the Umba River catchment, with minimal contribution from tidal and in-situ production. Therefore, the overall aim of this doctoral study is to investigate the influence of the transboundary Umba River on the connectivity of downstream coastal habitats and the terrestrial catchment. To achieve the objectives of this study, we evaluated 1) the geochemical and mineralogical composition of the Umba River sediments 2) analyzed and modeled elemental carbon (C), nitrogen (N), and their stable isotopes to determine the possible sources of sediment organic matter delivered to the Vanga estuary and 3) measured current sedimentation rates in the Vanga estuary to evaluate the possible response of Vanga mangroves to current and future rates of SLR. First, the Umba River sediments showed similar source geology along the river’s course from the source to its mouth in the Vanga Estuary. This is reflected by the similarity in the mineralogy and the chemical composition of sediments evident by the dominant mafic to felsic minerals discernible in both upstream and downstream sediments. The Umba River sediments also exhibit a moderate to high Chemical Index of Alteration (CIA) attributed to the variation from the dry to cold climate upstream (near the source) and humid climate further downstream. Secondly, based on the combined evaluation of elemental carbon (C) and nitrogen (N), C/N ratio, carbon, and nitrogen isotopes, together with the results of the applied Stable Isotope Mixing Model, a mixed source of sediment organic matter in the Vanga Estuary was observed. The mixing is attributed to the daily hydrodynamic flushing and bioturbation under the mangrove canopy. The model results also indicated that riverine organic matter was the dominant source with ~60% contribution to the total sediment organic matter. It validated our hypothesis on the influence of the Umba River on the Vanga Estuary. With sediment organic matter as a proxy, we conclude that the terrestrial catchment and Vanga Estuary are connected, with Umba River supplying both freshwater and sediments. Finally, having determined the connectivity of the Umba River catchment, downstream mangrove habitat in Vanga, and the consequent sediment input, we further evaluated the fate of the sediments in terms of deposition and mangrove surface elevation. Our data indicate that mangrove surface elevation is experiencing shallow subsidence of up to -15 mm/yr. At the same time, sediments also accreted by a rate of up to 9 mm/yr on the mangrove surface. This accretion rate exceeds the current rates of local SLR (3.8 mm/yr) and global SLR (3.1 mm/yr). The mangroves of Vanga would therefore be able to keep pace and persist under the current rates of SLR. However, accelerated SLR would marginally outpace the net mangrove surface elevation in Vanga. Our study implies that adaptive measures on mangrove conservation and management in Vanga need to capture the complex intra- and interhabitat sediment dynamics and interactions. This would include policy interventions through comprehensive and integrated cross-border resource management and governance. Archivierung/Langzeitarchivierung gewährleistet PEHB XA-DE-HB pdager DE-46 Kenya Tanzania Vanga transboundary sediments sedimentation mangroves Sea-level rise accretion provenance modeling conservation Umba River geochemical analysis mineralogy Hochschulschrift (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 gnd-content Westphal, Hildegard 1968- akademischer betreuerin (DE-588)12027941X (DE-627)080573355 (DE-576)292134827 dgs Hinderer, Matthias 1961- akademischer betreuerin (DE-588)172999847 (DE-627)697925285 (DE-576)133853098 dgs Universität Bremen Grad-verleihende Institution (DE-588)2001386-3 (DE-627)101380429 (DE-576)191575038 dgg Bremen (DE-588)4008135-7 (DE-627)106369636 (DE-576)208874569 uvp Erscheint auch als Druck-Ausgabe Kimeli, Amon Kibiwot Sediment dynamics in a transboundary mangrove habitat Bremen, 2022 xxii, 144, XXXV Seiten (DE-627)1804448133 https://doi.org/10.26092/elib/1546 Resolving-System kostenfrei https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 Resolving-System kostenfrei https://d-nb.info/1338949020/34 Langzeitarchivierung Nationalbibliothek kostenfrei https://media.suub.uni-bremen.de/handle/elib/5941 Verlag kostenfrei GBV-ODiss GBV_ILN_20 ISIL_DE-84 SYSFLAG_1 GBV_KXP GBV_ILN_21 ISIL_DE-46 GBV_ILN_22 ISIL_DE-18 GBV_ILN_23 ISIL_DE-830 GBV_ILN_30 ISIL_DE-104 GBV_ILN_40 ISIL_DE-7 GBV_ILN_60 ISIL_DE-705 GBV_ILN_63 ISIL_DE-Wim2 GBV_ILN_70 ISIL_DE-89 GBV_ILN_105 ISIL_DE-841 GBV_ILN_110 ISIL_DE-Luen4 GBV_ILN_132 ISIL_DE-959 GBV_ILN_151 ISIL_DE-546 GBV_ILN_161 ISIL_DE-960 GBV_ILN_293 ISIL_DE-960-3 GBV_ILN_370 ISIL_DE-1373 GBV_ILN_2403 ISIL_DE-LFER DSpace BO 20 01 0084 4593077702 x 12-10-24 21 01 0046 4139873809 ebook_2022_dissbremen Kostenloser Zugriff zza 27-05-22 22 01 0018 4593180473 SUBolrd xu 12-10-24 23 01 0830 4593229472 olr-d x 12-10-24 30 01 0104 4593276462 z 12-10-24 40 01 0007 4593310067 xsn 12-10-24 60 01 0705 4593368014 OLRD z 12-10-24 63 01 3401 4593423503 ORD x 12-10-24 70 01 0089 459347499X z 12-10-24 105 01 0841 4593866405 z 12-10-24 110 01 3110 4593578604 x 12-10-24 132 01 0959 459362231X OLR-DISS x 12-10-24 151 01 0546 4593665264 OLR-ODISS z 12-10-24 161 01 0960 4593688345 ORD z 12-10-24 293 01 3293 4593816289 ORD z 12-10-24 370 01 4370 4593853826 x 12-10-24 2403 01 DE-LFER 4185162596 00 --%%-- --%%-- n --%%-- l01 06-09-22 20 01 0084 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 21 01 0046 https://doi.org/10.26092/elib/1546 LF 22 01 0018 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 23 01 0830 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 30 01 0104 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 40 01 0007 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 60 01 0705 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 63 01 3401 E-Book https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 LF 70 01 0089 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 105 01 0841 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 110 01 3110 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 132 01 0959 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 151 01 0546 Volltext https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 161 01 0960 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 293 01 3293 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 370 01 4370 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 2403 01 DE-LFER https://doi.org/10.26092/elib/1546 21 00 DE-46 00 Universität Bremen 60 01 0705 10 ho 20 01 0084 OLRD 110 01 3110 OLRD 370 01 4370 OLRD 21 01 0046 ebook_2022_dissbremen 22 01 0018 SUBolrd 23 01 0830 olr-d 60 01 0705 OLRD 63 01 3401 ORD 132 01 0959 OLR-DISS 151 01 0546 OLR-ODISS 161 01 0960 ORD 293 01 3293 ORD 23 01 0830 2024-10-12 10:31:16 |
allfieldsSound |
urn:nbn:de:gbv:46-elib59411 urn 10.26092/elib/1546 doi (DE-627)1804446297 (DE-599)KXP1804446297 (OCoLC)1321074893 DE-627 ger DE-627 rda eng XA-DE-HB 551.468 DE-101 550 DE-101 Kimeli, Amon Kibiwot verfasserin (orcid)0000-0002-0798-7624 aut Sediment dynamics in a transboundary mangrove habitat a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya Amon Kibiwot Kimeli Bremen 2022 1 Online-Ressource (xxii, 144, XXXV Seiten) Illustrationen Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Dissertation Universität Bremen 2022 Mangroves are essential providers of environmental, economic, and ecological ecosystem services. Mangroves of Vanga occur in the most southerly coastal area of Kenya. They transcend the Kenya-Tanzania border and receive fresh water and particulate materials from the transboundary Umba River. Consequently, they provide a unique opportunity to study system dynamics borne of both anthropogenic and natural disturbances. Cognizant of the universal threat that mangroves face with respect to sea-level rise (SLR), the need to understand sediments dynamics within the Vanga estuary is vital for their conservation and management. This is because sedimentation has been identified as one of the factors that will allow mangroves to mitigate and modulate the effects of SLR. However, our knowledge and understanding of the sediment dynamics in the Vanga Estuary are limited. Consequently, it jeopardizes plans on mitigation and adaptive measures to be undertaken in the face of SLR and other resource management issues. We hypothesized that most of the Vanga Estuary sediments are sourced from the Umba River catchment, with minimal contribution from tidal and in-situ production. Therefore, the overall aim of this doctoral study is to investigate the influence of the transboundary Umba River on the connectivity of downstream coastal habitats and the terrestrial catchment. To achieve the objectives of this study, we evaluated 1) the geochemical and mineralogical composition of the Umba River sediments 2) analyzed and modeled elemental carbon (C), nitrogen (N), and their stable isotopes to determine the possible sources of sediment organic matter delivered to the Vanga estuary and 3) measured current sedimentation rates in the Vanga estuary to evaluate the possible response of Vanga mangroves to current and future rates of SLR. First, the Umba River sediments showed similar source geology along the river’s course from the source to its mouth in the Vanga Estuary. This is reflected by the similarity in the mineralogy and the chemical composition of sediments evident by the dominant mafic to felsic minerals discernible in both upstream and downstream sediments. The Umba River sediments also exhibit a moderate to high Chemical Index of Alteration (CIA) attributed to the variation from the dry to cold climate upstream (near the source) and humid climate further downstream. Secondly, based on the combined evaluation of elemental carbon (C) and nitrogen (N), C/N ratio, carbon, and nitrogen isotopes, together with the results of the applied Stable Isotope Mixing Model, a mixed source of sediment organic matter in the Vanga Estuary was observed. The mixing is attributed to the daily hydrodynamic flushing and bioturbation under the mangrove canopy. The model results also indicated that riverine organic matter was the dominant source with ~60% contribution to the total sediment organic matter. It validated our hypothesis on the influence of the Umba River on the Vanga Estuary. With sediment organic matter as a proxy, we conclude that the terrestrial catchment and Vanga Estuary are connected, with Umba River supplying both freshwater and sediments. Finally, having determined the connectivity of the Umba River catchment, downstream mangrove habitat in Vanga, and the consequent sediment input, we further evaluated the fate of the sediments in terms of deposition and mangrove surface elevation. Our data indicate that mangrove surface elevation is experiencing shallow subsidence of up to -15 mm/yr. At the same time, sediments also accreted by a rate of up to 9 mm/yr on the mangrove surface. This accretion rate exceeds the current rates of local SLR (3.8 mm/yr) and global SLR (3.1 mm/yr). The mangroves of Vanga would therefore be able to keep pace and persist under the current rates of SLR. However, accelerated SLR would marginally outpace the net mangrove surface elevation in Vanga. Our study implies that adaptive measures on mangrove conservation and management in Vanga need to capture the complex intra- and interhabitat sediment dynamics and interactions. This would include policy interventions through comprehensive and integrated cross-border resource management and governance. Archivierung/Langzeitarchivierung gewährleistet PEHB XA-DE-HB pdager DE-46 Kenya Tanzania Vanga transboundary sediments sedimentation mangroves Sea-level rise accretion provenance modeling conservation Umba River geochemical analysis mineralogy Hochschulschrift (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 gnd-content Westphal, Hildegard 1968- akademischer betreuerin (DE-588)12027941X (DE-627)080573355 (DE-576)292134827 dgs Hinderer, Matthias 1961- akademischer betreuerin (DE-588)172999847 (DE-627)697925285 (DE-576)133853098 dgs Universität Bremen Grad-verleihende Institution (DE-588)2001386-3 (DE-627)101380429 (DE-576)191575038 dgg Bremen (DE-588)4008135-7 (DE-627)106369636 (DE-576)208874569 uvp Erscheint auch als Druck-Ausgabe Kimeli, Amon Kibiwot Sediment dynamics in a transboundary mangrove habitat Bremen, 2022 xxii, 144, XXXV Seiten (DE-627)1804448133 https://doi.org/10.26092/elib/1546 Resolving-System kostenfrei https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 Resolving-System kostenfrei https://d-nb.info/1338949020/34 Langzeitarchivierung Nationalbibliothek kostenfrei https://media.suub.uni-bremen.de/handle/elib/5941 Verlag kostenfrei GBV-ODiss GBV_ILN_20 ISIL_DE-84 SYSFLAG_1 GBV_KXP GBV_ILN_21 ISIL_DE-46 GBV_ILN_22 ISIL_DE-18 GBV_ILN_23 ISIL_DE-830 GBV_ILN_30 ISIL_DE-104 GBV_ILN_40 ISIL_DE-7 GBV_ILN_60 ISIL_DE-705 GBV_ILN_63 ISIL_DE-Wim2 GBV_ILN_70 ISIL_DE-89 GBV_ILN_105 ISIL_DE-841 GBV_ILN_110 ISIL_DE-Luen4 GBV_ILN_132 ISIL_DE-959 GBV_ILN_151 ISIL_DE-546 GBV_ILN_161 ISIL_DE-960 GBV_ILN_293 ISIL_DE-960-3 GBV_ILN_370 ISIL_DE-1373 GBV_ILN_2403 ISIL_DE-LFER DSpace BO 20 01 0084 4593077702 x 12-10-24 21 01 0046 4139873809 ebook_2022_dissbremen Kostenloser Zugriff zza 27-05-22 22 01 0018 4593180473 SUBolrd xu 12-10-24 23 01 0830 4593229472 olr-d x 12-10-24 30 01 0104 4593276462 z 12-10-24 40 01 0007 4593310067 xsn 12-10-24 60 01 0705 4593368014 OLRD z 12-10-24 63 01 3401 4593423503 ORD x 12-10-24 70 01 0089 459347499X z 12-10-24 105 01 0841 4593866405 z 12-10-24 110 01 3110 4593578604 x 12-10-24 132 01 0959 459362231X OLR-DISS x 12-10-24 151 01 0546 4593665264 OLR-ODISS z 12-10-24 161 01 0960 4593688345 ORD z 12-10-24 293 01 3293 4593816289 ORD z 12-10-24 370 01 4370 4593853826 x 12-10-24 2403 01 DE-LFER 4185162596 00 --%%-- --%%-- n --%%-- l01 06-09-22 20 01 0084 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 21 01 0046 https://doi.org/10.26092/elib/1546 LF 22 01 0018 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 23 01 0830 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 30 01 0104 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 40 01 0007 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 60 01 0705 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 63 01 3401 E-Book https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 LF 70 01 0089 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 105 01 0841 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 110 01 3110 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 132 01 0959 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 151 01 0546 Volltext https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 161 01 0960 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 293 01 3293 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 370 01 4370 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411 2403 01 DE-LFER https://doi.org/10.26092/elib/1546 21 00 DE-46 00 Universität Bremen 60 01 0705 10 ho 20 01 0084 OLRD 110 01 3110 OLRD 370 01 4370 OLRD 21 01 0046 ebook_2022_dissbremen 22 01 0018 SUBolrd 23 01 0830 olr-d 60 01 0705 OLRD 63 01 3401 ORD 132 01 0959 OLR-DISS 151 01 0546 OLR-ODISS 161 01 0960 ORD 293 01 3293 ORD 23 01 0830 2024-10-12 10:31:16 |
language |
English |
format_phy_str_mv |
Book |
institution |
findex.gbv.de |
selectbib_iln_str_mv |
20@ 21@za 22@u 23@ 30@ 40@sn 60@ 63@ 70@ 105@ 110@ 132@ 151@ 161@ 293@ 370@ 2403@01 |
dewey-raw |
551.468 |
authorswithroles_txt_mv |
Kimeli, Amon Kibiwot @@aut@@ Westphal, Hildegard @@dgs@@ Hinderer, Matthias @@dgs@@ |
genre_facet |
Hochschulschrift |
fullrecord |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000cam a2200265 4500</leader><controlfield tag="001">1804446297</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20240912025629.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">220527s2022 gw |||||om 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">urn:nbn:de:gbv:46-elib59411</subfield><subfield code="2">urn</subfield></datafield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.26092/elib/1546</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)1804446297</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)KXP1804446297</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(OCoLC)1321074893</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rda</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="044" ind1=" " ind2=" "><subfield code="c">XA-DE-HB</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">551.468</subfield><subfield code="q">DE-101</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">DE-101</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Kimeli, Amon Kibiwot</subfield><subfield code="e">verfasserin</subfield><subfield code="0">(orcid)0000-0002-0798-7624</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Sediment dynamics in a transboundary mangrove habitat</subfield><subfield code="b">a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya</subfield><subfield code="c">Amon Kibiwot Kimeli</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="a">Bremen</subfield><subfield code="c">2022</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">1 Online-Ressource (xxii, 144, XXXV Seiten)</subfield><subfield code="b">Illustrationen</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="502" ind1=" " ind2=" "><subfield code="b">Dissertation</subfield><subfield code="c">Universität Bremen</subfield><subfield code="d">2022</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Mangroves are essential providers of environmental, economic, and ecological ecosystem services. Mangroves of Vanga occur in the most southerly coastal area of Kenya. They transcend the Kenya-Tanzania border and receive fresh water and particulate materials from the transboundary Umba River. Consequently, they provide a unique opportunity to study system dynamics borne of both anthropogenic and natural disturbances. Cognizant of the universal threat that mangroves face with respect to sea-level rise (SLR), the need to understand sediments dynamics within the Vanga estuary is vital for their conservation and management. This is because sedimentation has been identified as one of the factors that will allow mangroves to mitigate and modulate the effects of SLR. However, our knowledge and understanding of the sediment dynamics in the Vanga Estuary are limited. Consequently, it jeopardizes plans on mitigation and adaptive measures to be undertaken in the face of SLR and other resource management issues. We hypothesized that most of the Vanga Estuary sediments are sourced from the Umba River catchment, with minimal contribution from tidal and in-situ production. Therefore, the overall aim of this doctoral study is to investigate the influence of the transboundary Umba River on the connectivity of downstream coastal habitats and the terrestrial catchment. To achieve the objectives of this study, we evaluated 1) the geochemical and mineralogical composition of the Umba River sediments 2) analyzed and modeled elemental carbon (C), nitrogen (N), and their stable isotopes to determine the possible sources of sediment organic matter delivered to the Vanga estuary and 3) measured current sedimentation rates in the Vanga estuary to evaluate the possible response of Vanga mangroves to current and future rates of SLR. First, the Umba River sediments showed similar source geology along the river’s course from the source to its mouth in the Vanga Estuary. This is reflected by the similarity in the mineralogy and the chemical composition of sediments evident by the dominant mafic to felsic minerals discernible in both upstream and downstream sediments. The Umba River sediments also exhibit a moderate to high Chemical Index of Alteration (CIA) attributed to the variation from the dry to cold climate upstream (near the source) and humid climate further downstream. Secondly, based on the combined evaluation of elemental carbon (C) and nitrogen (N), C/N ratio, carbon, and nitrogen isotopes, together with the results of the applied Stable Isotope Mixing Model, a mixed source of sediment organic matter in the Vanga Estuary was observed. The mixing is attributed to the daily hydrodynamic flushing and bioturbation under the mangrove canopy. The model results also indicated that riverine organic matter was the dominant source with ~60% contribution to the total sediment organic matter. It validated our hypothesis on the influence of the Umba River on the Vanga Estuary. With sediment organic matter as a proxy, we conclude that the terrestrial catchment and Vanga Estuary are connected, with Umba River supplying both freshwater and sediments. Finally, having determined the connectivity of the Umba River catchment, downstream mangrove habitat in Vanga, and the consequent sediment input, we further evaluated the fate of the sediments in terms of deposition and mangrove surface elevation. Our data indicate that mangrove surface elevation is experiencing shallow subsidence of up to -15 mm/yr. At the same time, sediments also accreted by a rate of up to 9 mm/yr on the mangrove surface. This accretion rate exceeds the current rates of local SLR (3.8 mm/yr) and global SLR (3.1 mm/yr). The mangroves of Vanga would therefore be able to keep pace and persist under the current rates of SLR. However, accelerated SLR would marginally outpace the net mangrove surface elevation in Vanga. Our study implies that adaptive measures on mangrove conservation and management in Vanga need to capture the complex intra- and interhabitat sediment dynamics and interactions. This would include policy interventions through comprehensive and integrated cross-border resource management and governance.</subfield></datafield><datafield tag="583" ind1="1" ind2=" "><subfield code="a">Archivierung/Langzeitarchivierung gewährleistet</subfield><subfield code="f">PEHB</subfield><subfield code="x">XA-DE-HB</subfield><subfield code="2">pdager</subfield><subfield code="5">DE-46</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Kenya</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Tanzania</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Vanga</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">transboundary</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">sediments</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">sedimentation</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">mangroves</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Sea-level rise</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">accretion</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">provenance</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">modeling</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">conservation</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Umba River</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">geochemical analysis</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">mineralogy</subfield></datafield><datafield tag="655" ind1=" " ind2="7"><subfield code="a">Hochschulschrift</subfield><subfield code="0">(DE-588)4113937-9</subfield><subfield code="0">(DE-627)105825778</subfield><subfield code="0">(DE-576)209480580</subfield><subfield code="2">gnd-content</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Westphal, Hildegard</subfield><subfield code="d">1968-</subfield><subfield code="e">akademischer betreuerin</subfield><subfield code="0">(DE-588)12027941X</subfield><subfield code="0">(DE-627)080573355</subfield><subfield code="0">(DE-576)292134827</subfield><subfield code="4">dgs</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Hinderer, Matthias</subfield><subfield code="d">1961-</subfield><subfield code="e">akademischer betreuerin</subfield><subfield code="0">(DE-588)172999847</subfield><subfield code="0">(DE-627)697925285</subfield><subfield code="0">(DE-576)133853098</subfield><subfield code="4">dgs</subfield></datafield><datafield tag="710" ind1="2" ind2=" "><subfield code="a">Universität Bremen</subfield><subfield code="e">Grad-verleihende Institution</subfield><subfield code="0">(DE-588)2001386-3</subfield><subfield code="0">(DE-627)101380429</subfield><subfield code="0">(DE-576)191575038</subfield><subfield code="4">dgg</subfield></datafield><datafield tag="751" ind1=" " ind2=" "><subfield code="a">Bremen</subfield><subfield code="0">(DE-588)4008135-7</subfield><subfield code="0">(DE-627)106369636</subfield><subfield code="0">(DE-576)208874569</subfield><subfield code="4">uvp</subfield></datafield><datafield tag="776" ind1="0" ind2="8"><subfield code="i">Erscheint auch als</subfield><subfield code="n">Druck-Ausgabe</subfield><subfield code="a">Kimeli, Amon Kibiwot</subfield><subfield code="t">Sediment dynamics in a transboundary mangrove habitat</subfield><subfield code="d">Bremen, 2022</subfield><subfield code="h">xxii, 144, XXXV Seiten</subfield><subfield code="w">(DE-627)1804448133</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.26092/elib/1546</subfield><subfield code="x">Resolving-System</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield><subfield code="x">Resolving-System</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://d-nb.info/1338949020/34</subfield><subfield code="x">Langzeitarchivierung Nationalbibliothek</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://media.suub.uni-bremen.de/handle/elib/5941</subfield><subfield code="x">Verlag</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV-ODiss</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_20</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-84</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_1</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_KXP</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_21</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-46</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_22</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-18</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_23</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-830</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_30</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-104</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-7</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_60</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-705</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_63</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-Wim2</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-89</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_105</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-841</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_110</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-Luen4</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_132</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-959</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_151</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-546</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_161</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-960</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_293</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-960-3</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_370</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-1373</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2403</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-LFER</subfield></datafield><datafield tag="935" ind1=" " ind2=" "><subfield code="i">DSpace</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">BO</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">20</subfield><subfield code="1">01</subfield><subfield code="x">0084</subfield><subfield code="b">4593077702</subfield><subfield code="y">x</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">21</subfield><subfield code="1">01</subfield><subfield code="x">0046</subfield><subfield code="b">4139873809</subfield><subfield code="h">ebook_2022_dissbremen</subfield><subfield code="k">Kostenloser Zugriff</subfield><subfield code="y">zza</subfield><subfield code="z">27-05-22</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">22</subfield><subfield code="1">01</subfield><subfield code="x">0018</subfield><subfield code="b">4593180473</subfield><subfield code="h">SUBolrd</subfield><subfield code="y">xu</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">23</subfield><subfield code="1">01</subfield><subfield code="x">0830</subfield><subfield code="b">4593229472</subfield><subfield code="h">olr-d</subfield><subfield code="y">x</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">30</subfield><subfield code="1">01</subfield><subfield code="x">0104</subfield><subfield code="b">4593276462</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">40</subfield><subfield code="1">01</subfield><subfield code="x">0007</subfield><subfield code="b">4593310067</subfield><subfield code="y">xsn</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">60</subfield><subfield code="1">01</subfield><subfield code="x">0705</subfield><subfield code="b">4593368014</subfield><subfield code="h">OLRD</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">63</subfield><subfield code="1">01</subfield><subfield code="x">3401</subfield><subfield code="b">4593423503</subfield><subfield code="h">ORD</subfield><subfield code="y">x</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">70</subfield><subfield code="1">01</subfield><subfield code="x">0089</subfield><subfield code="b">459347499X</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">105</subfield><subfield code="1">01</subfield><subfield code="x">0841</subfield><subfield code="b">4593866405</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">110</subfield><subfield code="1">01</subfield><subfield code="x">3110</subfield><subfield code="b">4593578604</subfield><subfield code="y">x</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">132</subfield><subfield code="1">01</subfield><subfield code="x">0959</subfield><subfield code="b">459362231X</subfield><subfield code="h">OLR-DISS</subfield><subfield code="y">x</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">151</subfield><subfield code="1">01</subfield><subfield code="x">0546</subfield><subfield code="b">4593665264</subfield><subfield code="h">OLR-ODISS</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">161</subfield><subfield code="1">01</subfield><subfield code="x">0960</subfield><subfield code="b">4593688345</subfield><subfield code="h">ORD</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">293</subfield><subfield code="1">01</subfield><subfield code="x">3293</subfield><subfield code="b">4593816289</subfield><subfield code="h">ORD</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">370</subfield><subfield code="1">01</subfield><subfield code="x">4370</subfield><subfield code="b">4593853826</subfield><subfield code="y">x</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">2403</subfield><subfield code="1">01</subfield><subfield code="x">DE-LFER</subfield><subfield code="b">4185162596</subfield><subfield code="c">00</subfield><subfield code="f">--%%--</subfield><subfield code="d">--%%--</subfield><subfield code="e">n</subfield><subfield code="j">--%%--</subfield><subfield code="y">l01</subfield><subfield code="z">06-09-22</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">20</subfield><subfield code="1">01</subfield><subfield code="x">0084</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">21</subfield><subfield code="1">01</subfield><subfield code="x">0046</subfield><subfield code="r">https://doi.org/10.26092/elib/1546</subfield><subfield code="z">LF</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">22</subfield><subfield code="1">01</subfield><subfield code="x">0018</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">23</subfield><subfield code="1">01</subfield><subfield code="x">0830</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">30</subfield><subfield code="1">01</subfield><subfield code="x">0104</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">40</subfield><subfield code="1">01</subfield><subfield code="x">0007</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">60</subfield><subfield code="1">01</subfield><subfield code="x">0705</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">63</subfield><subfield code="1">01</subfield><subfield code="x">3401</subfield><subfield code="y">E-Book</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield><subfield code="z">LF</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">70</subfield><subfield code="1">01</subfield><subfield code="x">0089</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">105</subfield><subfield code="1">01</subfield><subfield code="x">0841</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">110</subfield><subfield code="1">01</subfield><subfield code="x">3110</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">132</subfield><subfield code="1">01</subfield><subfield code="x">0959</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">151</subfield><subfield code="1">01</subfield><subfield code="x">0546</subfield><subfield code="y">Volltext</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">161</subfield><subfield code="1">01</subfield><subfield code="x">0960</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">293</subfield><subfield code="1">01</subfield><subfield code="x">3293</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">370</subfield><subfield code="1">01</subfield><subfield code="x">4370</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">2403</subfield><subfield code="1">01</subfield><subfield code="x">DE-LFER</subfield><subfield code="r">https://doi.org/10.26092/elib/1546</subfield></datafield><datafield tag="982" ind1=" " ind2=" "><subfield code="2">21</subfield><subfield code="1">00</subfield><subfield code="x">DE-46</subfield><subfield code="8">00</subfield><subfield code="a">Universität Bremen</subfield></datafield><datafield tag="983" ind1=" " ind2=" "><subfield code="2">60</subfield><subfield code="1">01</subfield><subfield code="x">0705</subfield><subfield code="8">10</subfield><subfield code="a">ho</subfield></datafield><datafield tag="985" ind1=" " ind2=" "><subfield code="2">20</subfield><subfield code="1">01</subfield><subfield code="x">0084</subfield><subfield code="a">OLRD</subfield></datafield><datafield tag="985" ind1=" " ind2=" "><subfield code="2">110</subfield><subfield code="1">01</subfield><subfield code="x">3110</subfield><subfield code="a">OLRD</subfield></datafield><datafield tag="985" ind1=" " ind2=" "><subfield code="2">370</subfield><subfield code="1">01</subfield><subfield code="x">4370</subfield><subfield code="a">OLRD</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">21</subfield><subfield code="1">01</subfield><subfield code="x">0046</subfield><subfield code="a">ebook_2022_dissbremen</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">22</subfield><subfield code="1">01</subfield><subfield code="x">0018</subfield><subfield code="a">SUBolrd</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">23</subfield><subfield code="1">01</subfield><subfield code="x">0830</subfield><subfield code="a">olr-d</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">60</subfield><subfield code="1">01</subfield><subfield code="x">0705</subfield><subfield code="a">OLRD</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">63</subfield><subfield code="1">01</subfield><subfield code="x">3401</subfield><subfield code="a">ORD</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">132</subfield><subfield code="1">01</subfield><subfield code="x">0959</subfield><subfield code="a">OLR-DISS</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">151</subfield><subfield code="1">01</subfield><subfield code="x">0546</subfield><subfield code="a">OLR-ODISS</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">161</subfield><subfield code="1">01</subfield><subfield code="x">0960</subfield><subfield code="a">ORD</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">293</subfield><subfield code="1">01</subfield><subfield code="x">3293</subfield><subfield code="a">ORD</subfield></datafield><datafield tag="998" ind1=" " ind2=" "><subfield code="2">23</subfield><subfield code="1">01</subfield><subfield code="x">0830</subfield><subfield code="0">2024-10-12 10:31:16</subfield></datafield></record></collection>
|
standort_iln_str_mv |
2403:--%%-- DE-LFER:--%%-- |
author |
Kimeli, Amon Kibiwot |
spellingShingle |
Kimeli, Amon Kibiwot ddc 551.468 ddc 550 misc Kenya misc Tanzania misc Vanga misc transboundary misc sediments misc sedimentation misc mangroves misc Sea-level rise misc accretion misc provenance misc modeling misc conservation misc Umba River misc geochemical analysis misc mineralogy 21 Universität Bremen Sediment dynamics in a transboundary mangrove habitat a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya |
authorStr |
Kimeli, Amon Kibiwot |
ppnlink_with_tag_str_mv |
@@776@@(DE-627)1804448133 |
format |
eBook |
collection |
KXP GVK SWB |
remote_str |
true |
abrufzeichen_iln_str_mv |
21@ebook_2022_dissbremen 22@SUBolrd 23@olr-d 60@OLRD 63@ORD 132@OLR-DISS 151@OLR-ODISS 161@ORD 293@ORD |
abrufzeichen_iln_scis_mv |
21@ebook_2022_dissbremen 22@SUBolrd 23@olr-d 60@OLRD 63@ORD 132@OLR-DISS 151@OLR-ODISS 161@ORD 293@ORD |
notation_local_iln_str_mv |
60:ho 0705:ho |
topic |
ddc 551.468 ddc 550 misc Kenya misc Tanzania misc Vanga misc transboundary misc sediments misc sedimentation misc mangroves misc Sea-level rise misc accretion misc provenance misc modeling misc conservation misc Umba River misc geochemical analysis misc mineralogy 21 Universität Bremen |
topic_unstemmed |
ddc 551.468 ddc 550 misc Kenya misc Tanzania misc Vanga misc transboundary misc sediments misc sedimentation misc mangroves misc Sea-level rise misc accretion misc provenance misc modeling misc conservation misc Umba River misc geochemical analysis misc mineralogy 21 Universität Bremen |
topic_browse |
ddc 551.468 ddc 550 misc Kenya misc Tanzania misc Vanga misc transboundary misc sediments misc sedimentation misc mangroves misc Sea-level rise misc accretion misc provenance misc modeling misc conservation misc Umba River misc geochemical analysis misc mineralogy 21 Universität Bremen |
format_main_str_mv |
Text Buch |
format_details_str_mv |
Hochschulschrift |
carriertype_str_mv |
cr |
author2_variant |
h w hw m h mh |
dewey-tens |
550 - Earth sciences & geology |
title |
Sediment dynamics in a transboundary mangrove habitat a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya |
exemplarkommentar_str_mv |
21@Kostenloser Zugriff |
callnumber-first-code |
- |
lang_code |
eng |
class_local |
60 01 0705 10 ho |
selektneu_str_mv |
23@2024-10-12 10:31:16 |
dewey-hundreds |
500 - Science |
recordtype |
marc |
contenttype_str_mv |
txt |
class_local_iln |
60:ho 0705:ho |
author_browse |
Kimeli, Amon Kibiwot |
physical |
1 Online-Ressource (xxii, 144, XXXV Seiten) Illustrationen |
class |
551.468 DE-101 550 DE-101 60 01 0705 10 ho |
classname_local_iln_str_mv |
60: 0705: |
normlink |
(ORCID)0000-0002-0798-7624 4113937-9 105825778 209480580 12027941X 080573355 292134827 172999847 697925285 133853098 2001386-3 101380429 191575038 4008135-7 106369636 208874569 2024-10-12 10:31:16 |
normlink_prefix_str_mv |
(orcid)0000-0002-0798-7624 (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 (DE-588)12027941X (DE-627)080573355 (DE-576)292134827 (DE-588)172999847 (DE-627)697925285 (DE-576)133853098 (DE-588)2001386-3 (DE-627)101380429 (DE-576)191575038 (DE-588)4008135-7 (DE-627)106369636 (DE-576)208874569 2024-10-12 10:31:16 |
collection_details |
GBV-ODiss GBV_ILN_20 ISIL_DE-84 SYSFLAG_1 GBV_KXP GBV_ILN_21 ISIL_DE-46 GBV_ILN_22 ISIL_DE-18 GBV_ILN_23 ISIL_DE-830 GBV_ILN_30 ISIL_DE-104 GBV_ILN_40 ISIL_DE-7 GBV_ILN_60 ISIL_DE-705 GBV_ILN_63 ISIL_DE-Wim2 GBV_ILN_70 ISIL_DE-89 GBV_ILN_105 ISIL_DE-841 GBV_ILN_110 ISIL_DE-Luen4 GBV_ILN_132 ISIL_DE-959 GBV_ILN_151 ISIL_DE-546 GBV_ILN_161 ISIL_DE-960 GBV_ILN_293 ISIL_DE-960-3 GBV_ILN_370 ISIL_DE-1373 GBV_ILN_2403 ISIL_DE-LFER |
title_short |
Sediment dynamics in a transboundary mangrove habitat |
ausleihindikator_str_mv |
20 21 22 23 30 40 60 63 70 105 110 132 151 161 293 370 2403:n |
rolewithnormlink_str_mv |
@@655@@(DE-588)4113937-9 @@dgs@@(DE-588)12027941X @@dgs@@(DE-588)172999847 @@dgg@@(DE-588)2001386-3 @@uvp@@(DE-588)4008135-7 |
remote_bool |
true |
doi_str |
10.26092/elib/1546 |
callnumber-a |
--%%-- |
up_date |
2024-10-13T07:05:11.610Z |
_version_ |
1812781451563761664 |
fullrecord_marcxml |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000cam a2200265 4500</leader><controlfield tag="001">1804446297</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20240912025629.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">220527s2022 gw |||||om 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">urn:nbn:de:gbv:46-elib59411</subfield><subfield code="2">urn</subfield></datafield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.26092/elib/1546</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)1804446297</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)KXP1804446297</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(OCoLC)1321074893</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rda</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="044" ind1=" " ind2=" "><subfield code="c">XA-DE-HB</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">551.468</subfield><subfield code="q">DE-101</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">DE-101</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Kimeli, Amon Kibiwot</subfield><subfield code="e">verfasserin</subfield><subfield code="0">(orcid)0000-0002-0798-7624</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Sediment dynamics in a transboundary mangrove habitat</subfield><subfield code="b">a perspective of sediment sources and sedimentation in the Vanga estuary, Kenya</subfield><subfield code="c">Amon Kibiwot Kimeli</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="a">Bremen</subfield><subfield code="c">2022</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">1 Online-Ressource (xxii, 144, XXXV Seiten)</subfield><subfield code="b">Illustrationen</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="502" ind1=" " ind2=" "><subfield code="b">Dissertation</subfield><subfield code="c">Universität Bremen</subfield><subfield code="d">2022</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Mangroves are essential providers of environmental, economic, and ecological ecosystem services. Mangroves of Vanga occur in the most southerly coastal area of Kenya. They transcend the Kenya-Tanzania border and receive fresh water and particulate materials from the transboundary Umba River. Consequently, they provide a unique opportunity to study system dynamics borne of both anthropogenic and natural disturbances. Cognizant of the universal threat that mangroves face with respect to sea-level rise (SLR), the need to understand sediments dynamics within the Vanga estuary is vital for their conservation and management. This is because sedimentation has been identified as one of the factors that will allow mangroves to mitigate and modulate the effects of SLR. However, our knowledge and understanding of the sediment dynamics in the Vanga Estuary are limited. Consequently, it jeopardizes plans on mitigation and adaptive measures to be undertaken in the face of SLR and other resource management issues. We hypothesized that most of the Vanga Estuary sediments are sourced from the Umba River catchment, with minimal contribution from tidal and in-situ production. Therefore, the overall aim of this doctoral study is to investigate the influence of the transboundary Umba River on the connectivity of downstream coastal habitats and the terrestrial catchment. To achieve the objectives of this study, we evaluated 1) the geochemical and mineralogical composition of the Umba River sediments 2) analyzed and modeled elemental carbon (C), nitrogen (N), and their stable isotopes to determine the possible sources of sediment organic matter delivered to the Vanga estuary and 3) measured current sedimentation rates in the Vanga estuary to evaluate the possible response of Vanga mangroves to current and future rates of SLR. First, the Umba River sediments showed similar source geology along the river’s course from the source to its mouth in the Vanga Estuary. This is reflected by the similarity in the mineralogy and the chemical composition of sediments evident by the dominant mafic to felsic minerals discernible in both upstream and downstream sediments. The Umba River sediments also exhibit a moderate to high Chemical Index of Alteration (CIA) attributed to the variation from the dry to cold climate upstream (near the source) and humid climate further downstream. Secondly, based on the combined evaluation of elemental carbon (C) and nitrogen (N), C/N ratio, carbon, and nitrogen isotopes, together with the results of the applied Stable Isotope Mixing Model, a mixed source of sediment organic matter in the Vanga Estuary was observed. The mixing is attributed to the daily hydrodynamic flushing and bioturbation under the mangrove canopy. The model results also indicated that riverine organic matter was the dominant source with ~60% contribution to the total sediment organic matter. It validated our hypothesis on the influence of the Umba River on the Vanga Estuary. With sediment organic matter as a proxy, we conclude that the terrestrial catchment and Vanga Estuary are connected, with Umba River supplying both freshwater and sediments. Finally, having determined the connectivity of the Umba River catchment, downstream mangrove habitat in Vanga, and the consequent sediment input, we further evaluated the fate of the sediments in terms of deposition and mangrove surface elevation. Our data indicate that mangrove surface elevation is experiencing shallow subsidence of up to -15 mm/yr. At the same time, sediments also accreted by a rate of up to 9 mm/yr on the mangrove surface. This accretion rate exceeds the current rates of local SLR (3.8 mm/yr) and global SLR (3.1 mm/yr). The mangroves of Vanga would therefore be able to keep pace and persist under the current rates of SLR. However, accelerated SLR would marginally outpace the net mangrove surface elevation in Vanga. Our study implies that adaptive measures on mangrove conservation and management in Vanga need to capture the complex intra- and interhabitat sediment dynamics and interactions. This would include policy interventions through comprehensive and integrated cross-border resource management and governance.</subfield></datafield><datafield tag="583" ind1="1" ind2=" "><subfield code="a">Archivierung/Langzeitarchivierung gewährleistet</subfield><subfield code="f">PEHB</subfield><subfield code="x">XA-DE-HB</subfield><subfield code="2">pdager</subfield><subfield code="5">DE-46</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Kenya</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Tanzania</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Vanga</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">transboundary</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">sediments</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">sedimentation</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">mangroves</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Sea-level rise</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">accretion</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">provenance</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">modeling</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">conservation</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Umba River</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">geochemical analysis</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">mineralogy</subfield></datafield><datafield tag="655" ind1=" " ind2="7"><subfield code="a">Hochschulschrift</subfield><subfield code="0">(DE-588)4113937-9</subfield><subfield code="0">(DE-627)105825778</subfield><subfield code="0">(DE-576)209480580</subfield><subfield code="2">gnd-content</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Westphal, Hildegard</subfield><subfield code="d">1968-</subfield><subfield code="e">akademischer betreuerin</subfield><subfield code="0">(DE-588)12027941X</subfield><subfield code="0">(DE-627)080573355</subfield><subfield code="0">(DE-576)292134827</subfield><subfield code="4">dgs</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Hinderer, Matthias</subfield><subfield code="d">1961-</subfield><subfield code="e">akademischer betreuerin</subfield><subfield code="0">(DE-588)172999847</subfield><subfield code="0">(DE-627)697925285</subfield><subfield code="0">(DE-576)133853098</subfield><subfield code="4">dgs</subfield></datafield><datafield tag="710" ind1="2" ind2=" "><subfield code="a">Universität Bremen</subfield><subfield code="e">Grad-verleihende Institution</subfield><subfield code="0">(DE-588)2001386-3</subfield><subfield code="0">(DE-627)101380429</subfield><subfield code="0">(DE-576)191575038</subfield><subfield code="4">dgg</subfield></datafield><datafield tag="751" ind1=" " ind2=" "><subfield code="a">Bremen</subfield><subfield code="0">(DE-588)4008135-7</subfield><subfield code="0">(DE-627)106369636</subfield><subfield code="0">(DE-576)208874569</subfield><subfield code="4">uvp</subfield></datafield><datafield tag="776" ind1="0" ind2="8"><subfield code="i">Erscheint auch als</subfield><subfield code="n">Druck-Ausgabe</subfield><subfield code="a">Kimeli, Amon Kibiwot</subfield><subfield code="t">Sediment dynamics in a transboundary mangrove habitat</subfield><subfield code="d">Bremen, 2022</subfield><subfield code="h">xxii, 144, XXXV Seiten</subfield><subfield code="w">(DE-627)1804448133</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.26092/elib/1546</subfield><subfield code="x">Resolving-System</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield><subfield code="x">Resolving-System</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://d-nb.info/1338949020/34</subfield><subfield code="x">Langzeitarchivierung Nationalbibliothek</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://media.suub.uni-bremen.de/handle/elib/5941</subfield><subfield code="x">Verlag</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV-ODiss</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_20</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-84</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_1</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_KXP</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_21</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-46</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_22</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-18</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_23</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-830</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_30</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-104</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-7</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_60</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-705</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_63</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-Wim2</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-89</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_105</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-841</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_110</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-Luen4</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_132</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-959</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_151</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-546</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_161</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-960</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_293</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-960-3</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_370</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-1373</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2403</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ISIL_DE-LFER</subfield></datafield><datafield tag="935" ind1=" " ind2=" "><subfield code="i">DSpace</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">BO</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">20</subfield><subfield code="1">01</subfield><subfield code="x">0084</subfield><subfield code="b">4593077702</subfield><subfield code="y">x</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">21</subfield><subfield code="1">01</subfield><subfield code="x">0046</subfield><subfield code="b">4139873809</subfield><subfield code="h">ebook_2022_dissbremen</subfield><subfield code="k">Kostenloser Zugriff</subfield><subfield code="y">zza</subfield><subfield code="z">27-05-22</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">22</subfield><subfield code="1">01</subfield><subfield code="x">0018</subfield><subfield code="b">4593180473</subfield><subfield code="h">SUBolrd</subfield><subfield code="y">xu</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">23</subfield><subfield code="1">01</subfield><subfield code="x">0830</subfield><subfield code="b">4593229472</subfield><subfield code="h">olr-d</subfield><subfield code="y">x</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">30</subfield><subfield code="1">01</subfield><subfield code="x">0104</subfield><subfield code="b">4593276462</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">40</subfield><subfield code="1">01</subfield><subfield code="x">0007</subfield><subfield code="b">4593310067</subfield><subfield code="y">xsn</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">60</subfield><subfield code="1">01</subfield><subfield code="x">0705</subfield><subfield code="b">4593368014</subfield><subfield code="h">OLRD</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">63</subfield><subfield code="1">01</subfield><subfield code="x">3401</subfield><subfield code="b">4593423503</subfield><subfield code="h">ORD</subfield><subfield code="y">x</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">70</subfield><subfield code="1">01</subfield><subfield code="x">0089</subfield><subfield code="b">459347499X</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">105</subfield><subfield code="1">01</subfield><subfield code="x">0841</subfield><subfield code="b">4593866405</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">110</subfield><subfield code="1">01</subfield><subfield code="x">3110</subfield><subfield code="b">4593578604</subfield><subfield code="y">x</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">132</subfield><subfield code="1">01</subfield><subfield code="x">0959</subfield><subfield code="b">459362231X</subfield><subfield code="h">OLR-DISS</subfield><subfield code="y">x</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">151</subfield><subfield code="1">01</subfield><subfield code="x">0546</subfield><subfield code="b">4593665264</subfield><subfield code="h">OLR-ODISS</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">161</subfield><subfield code="1">01</subfield><subfield code="x">0960</subfield><subfield code="b">4593688345</subfield><subfield code="h">ORD</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">293</subfield><subfield code="1">01</subfield><subfield code="x">3293</subfield><subfield code="b">4593816289</subfield><subfield code="h">ORD</subfield><subfield code="y">z</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">370</subfield><subfield code="1">01</subfield><subfield code="x">4370</subfield><subfield code="b">4593853826</subfield><subfield code="y">x</subfield><subfield code="z">12-10-24</subfield></datafield><datafield tag="980" ind1=" " ind2=" "><subfield code="2">2403</subfield><subfield code="1">01</subfield><subfield code="x">DE-LFER</subfield><subfield code="b">4185162596</subfield><subfield code="c">00</subfield><subfield code="f">--%%--</subfield><subfield code="d">--%%--</subfield><subfield code="e">n</subfield><subfield code="j">--%%--</subfield><subfield code="y">l01</subfield><subfield code="z">06-09-22</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">20</subfield><subfield code="1">01</subfield><subfield code="x">0084</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">21</subfield><subfield code="1">01</subfield><subfield code="x">0046</subfield><subfield code="r">https://doi.org/10.26092/elib/1546</subfield><subfield code="z">LF</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">22</subfield><subfield code="1">01</subfield><subfield code="x">0018</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">23</subfield><subfield code="1">01</subfield><subfield code="x">0830</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">30</subfield><subfield code="1">01</subfield><subfield code="x">0104</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">40</subfield><subfield code="1">01</subfield><subfield code="x">0007</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">60</subfield><subfield code="1">01</subfield><subfield code="x">0705</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">63</subfield><subfield code="1">01</subfield><subfield code="x">3401</subfield><subfield code="y">E-Book</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield><subfield code="z">LF</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">70</subfield><subfield code="1">01</subfield><subfield code="x">0089</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">105</subfield><subfield code="1">01</subfield><subfield code="x">0841</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">110</subfield><subfield code="1">01</subfield><subfield code="x">3110</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">132</subfield><subfield code="1">01</subfield><subfield code="x">0959</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">151</subfield><subfield code="1">01</subfield><subfield code="x">0546</subfield><subfield code="y">Volltext</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">161</subfield><subfield code="1">01</subfield><subfield code="x">0960</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">293</subfield><subfield code="1">01</subfield><subfield code="x">3293</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">370</subfield><subfield code="1">01</subfield><subfield code="x">4370</subfield><subfield code="r">https://nbn-resolving.org/urn:nbn:de:gbv:46-elib59411</subfield></datafield><datafield tag="981" ind1=" " ind2=" "><subfield code="2">2403</subfield><subfield code="1">01</subfield><subfield code="x">DE-LFER</subfield><subfield code="r">https://doi.org/10.26092/elib/1546</subfield></datafield><datafield tag="982" ind1=" " ind2=" "><subfield code="2">21</subfield><subfield code="1">00</subfield><subfield code="x">DE-46</subfield><subfield code="8">00</subfield><subfield code="a">Universität Bremen</subfield></datafield><datafield tag="983" ind1=" " ind2=" "><subfield code="2">60</subfield><subfield code="1">01</subfield><subfield code="x">0705</subfield><subfield code="8">10</subfield><subfield code="a">ho</subfield></datafield><datafield tag="985" ind1=" " ind2=" "><subfield code="2">20</subfield><subfield code="1">01</subfield><subfield code="x">0084</subfield><subfield code="a">OLRD</subfield></datafield><datafield tag="985" ind1=" " ind2=" "><subfield code="2">110</subfield><subfield code="1">01</subfield><subfield code="x">3110</subfield><subfield code="a">OLRD</subfield></datafield><datafield tag="985" ind1=" " ind2=" "><subfield code="2">370</subfield><subfield code="1">01</subfield><subfield code="x">4370</subfield><subfield code="a">OLRD</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">21</subfield><subfield code="1">01</subfield><subfield code="x">0046</subfield><subfield code="a">ebook_2022_dissbremen</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">22</subfield><subfield code="1">01</subfield><subfield code="x">0018</subfield><subfield code="a">SUBolrd</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">23</subfield><subfield code="1">01</subfield><subfield code="x">0830</subfield><subfield code="a">olr-d</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">60</subfield><subfield code="1">01</subfield><subfield code="x">0705</subfield><subfield code="a">OLRD</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">63</subfield><subfield code="1">01</subfield><subfield code="x">3401</subfield><subfield code="a">ORD</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">132</subfield><subfield code="1">01</subfield><subfield code="x">0959</subfield><subfield code="a">OLR-DISS</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">151</subfield><subfield code="1">01</subfield><subfield code="x">0546</subfield><subfield code="a">OLR-ODISS</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">161</subfield><subfield code="1">01</subfield><subfield code="x">0960</subfield><subfield code="a">ORD</subfield></datafield><datafield tag="995" ind1=" " ind2=" "><subfield code="2">293</subfield><subfield code="1">01</subfield><subfield code="x">3293</subfield><subfield code="a">ORD</subfield></datafield><datafield tag="998" ind1=" " ind2=" "><subfield code="2">23</subfield><subfield code="1">01</subfield><subfield code="x">0830</subfield><subfield code="0">2024-10-12 10:31:16</subfield></datafield></record></collection>
|
score |
7.013689 |