Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records

Abstract Five coticolous lichen samples were collected from western Hubei Province of China to analyze the long chain n-alkanes and their carbon isotope compositions. The n-alkanes range in carbon number from $ C_{17} $ to $ C_{33} $ with strong odd-over-even predominance between $ C_{21} $ and $ C_...
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Autor*in:	Huang, Xianyu [verfasserIn] Xue, Jiantao [verfasserIn] Guo, Shouyu [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2011

Schlagwörter:	lichen alkane 3-methylalkanes -C compound specific carbon isotope

Übergeordnetes Werk:	Enthalten in: Frontiers of earth science in China - Beijing : Higher Education Press, 2007, 6(2011), 1 vom: 29. Dez., Seite 95-100
Übergeordnetes Werk:	volume:6 ; year:2011 ; number:1 ; day:29 ; month:12 ; pages:95-100

Links:	Volltext

DOI / URN:	10.1007/s11707-012-0300-8

Katalog-ID:	SPR021962383

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520			\|a Abstract Five coticolous lichen samples were collected from western Hubei Province of China to analyze the long chain n-alkanes and their carbon isotope compositions. The n-alkanes range in carbon number from $ C_{17} $ to $ C_{33} $ with strong odd-over-even predominance between $ C_{21} $ and $ C_{33} $. Lichens are dominated by n-$ C_{29} $ in the samples of Dajiuhu, Shennongjia Mountain, but by both n-$ C_{23} $ and n-$ C_{29} $ at Qizimei Mountain. This difference may result from the different environmental conditions in these two sites. The δ13C values of long chain n-alkanes in lichen samples show the signature of C3 plants. Based on compoundspecific carbon isotopic values and previous results, we state that alkane homologs >$ C_{23} $ mainly originate from the symbiotic fungi, while symbiotic algae only contribute trace amount of long chain alkanes. Of great interesting is the occurrence of long chain 3-methylalkanes in the Qizimei samples. These anteiso compounds range from $ C_{24} $ to $ C_{32} $, displaying obvious even-over-odd predominance. This study reveals that the association of long chain 3-methylalkanes with n-$ C_{23} $ alkane might be used as proxies to reconstruct the paleoecological implications of lichens in Earth history.
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allfields	10.1007/s11707-012-0300-8 doi (DE-627)SPR021962383 (SPR)s11707-012-0300-8-e DE-627 ger DE-627 rakwb eng 550 ASE Huang, Xianyu verfasserin aut Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Five coticolous lichen samples were collected from western Hubei Province of China to analyze the long chain n-alkanes and their carbon isotope compositions. The n-alkanes range in carbon number from $ C_{17} $ to $ C_{33} $ with strong odd-over-even predominance between $ C_{21} $ and $ C_{33} $. Lichens are dominated by n-$ C_{29} $ in the samples of Dajiuhu, Shennongjia Mountain, but by both n-$ C_{23} $ and n-$ C_{29} $ at Qizimei Mountain. This difference may result from the different environmental conditions in these two sites. The δ13C values of long chain n-alkanes in lichen samples show the signature of C3 plants. Based on compoundspecific carbon isotopic values and previous results, we state that alkane homologs >$ C_{23} $ mainly originate from the symbiotic fungi, while symbiotic algae only contribute trace amount of long chain alkanes. Of great interesting is the occurrence of long chain 3-methylalkanes in the Qizimei samples. These anteiso compounds range from $ C_{24} $ to $ C_{32} $, displaying obvious even-over-odd predominance. This study reveals that the association of long chain 3-methylalkanes with n-$ C_{23} $ alkane might be used as proxies to reconstruct the paleoecological implications of lichens in Earth history. lichen (dpeaa)DE-He213 alkane (dpeaa)DE-He213 3-methylalkanes (dpeaa)DE-He213 -C (dpeaa)DE-He213 alkane (dpeaa)DE-He213 compound specific carbon isotope (dpeaa)DE-He213 Xue, Jiantao verfasserin aut Guo, Shouyu verfasserin aut Enthalten in Frontiers of earth science in China Beijing : Higher Education Press, 2007 6(2011), 1 vom: 29. Dez., Seite 95-100 (DE-627)546007406 (DE-600)2389435-0 1673-7490 nnns volume:6 year:2011 number:1 day:29 month:12 pages:95-100 https://dx.doi.org/10.1007/s11707-012-0300-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-GEO SSG-OPC-GGO SSG-OPC-ASE GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 6 2011 1 29 12 95-100
spelling	10.1007/s11707-012-0300-8 doi (DE-627)SPR021962383 (SPR)s11707-012-0300-8-e DE-627 ger DE-627 rakwb eng 550 ASE Huang, Xianyu verfasserin aut Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Five coticolous lichen samples were collected from western Hubei Province of China to analyze the long chain n-alkanes and their carbon isotope compositions. The n-alkanes range in carbon number from $ C_{17} $ to $ C_{33} $ with strong odd-over-even predominance between $ C_{21} $ and $ C_{33} $. Lichens are dominated by n-$ C_{29} $ in the samples of Dajiuhu, Shennongjia Mountain, but by both n-$ C_{23} $ and n-$ C_{29} $ at Qizimei Mountain. This difference may result from the different environmental conditions in these two sites. The δ13C values of long chain n-alkanes in lichen samples show the signature of C3 plants. Based on compoundspecific carbon isotopic values and previous results, we state that alkane homologs >$ C_{23} $ mainly originate from the symbiotic fungi, while symbiotic algae only contribute trace amount of long chain alkanes. Of great interesting is the occurrence of long chain 3-methylalkanes in the Qizimei samples. These anteiso compounds range from $ C_{24} $ to $ C_{32} $, displaying obvious even-over-odd predominance. This study reveals that the association of long chain 3-methylalkanes with n-$ C_{23} $ alkane might be used as proxies to reconstruct the paleoecological implications of lichens in Earth history. lichen (dpeaa)DE-He213 alkane (dpeaa)DE-He213 3-methylalkanes (dpeaa)DE-He213 -C (dpeaa)DE-He213 alkane (dpeaa)DE-He213 compound specific carbon isotope (dpeaa)DE-He213 Xue, Jiantao verfasserin aut Guo, Shouyu verfasserin aut Enthalten in Frontiers of earth science in China Beijing : Higher Education Press, 2007 6(2011), 1 vom: 29. Dez., Seite 95-100 (DE-627)546007406 (DE-600)2389435-0 1673-7490 nnns volume:6 year:2011 number:1 day:29 month:12 pages:95-100 https://dx.doi.org/10.1007/s11707-012-0300-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-GEO SSG-OPC-GGO SSG-OPC-ASE GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 6 2011 1 29 12 95-100
allfields_unstemmed	10.1007/s11707-012-0300-8 doi (DE-627)SPR021962383 (SPR)s11707-012-0300-8-e DE-627 ger DE-627 rakwb eng 550 ASE Huang, Xianyu verfasserin aut Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Five coticolous lichen samples were collected from western Hubei Province of China to analyze the long chain n-alkanes and their carbon isotope compositions. The n-alkanes range in carbon number from $ C_{17} $ to $ C_{33} $ with strong odd-over-even predominance between $ C_{21} $ and $ C_{33} $. Lichens are dominated by n-$ C_{29} $ in the samples of Dajiuhu, Shennongjia Mountain, but by both n-$ C_{23} $ and n-$ C_{29} $ at Qizimei Mountain. This difference may result from the different environmental conditions in these two sites. The δ13C values of long chain n-alkanes in lichen samples show the signature of C3 plants. Based on compoundspecific carbon isotopic values and previous results, we state that alkane homologs >$ C_{23} $ mainly originate from the symbiotic fungi, while symbiotic algae only contribute trace amount of long chain alkanes. Of great interesting is the occurrence of long chain 3-methylalkanes in the Qizimei samples. These anteiso compounds range from $ C_{24} $ to $ C_{32} $, displaying obvious even-over-odd predominance. This study reveals that the association of long chain 3-methylalkanes with n-$ C_{23} $ alkane might be used as proxies to reconstruct the paleoecological implications of lichens in Earth history. lichen (dpeaa)DE-He213 alkane (dpeaa)DE-He213 3-methylalkanes (dpeaa)DE-He213 -C (dpeaa)DE-He213 alkane (dpeaa)DE-He213 compound specific carbon isotope (dpeaa)DE-He213 Xue, Jiantao verfasserin aut Guo, Shouyu verfasserin aut Enthalten in Frontiers of earth science in China Beijing : Higher Education Press, 2007 6(2011), 1 vom: 29. Dez., Seite 95-100 (DE-627)546007406 (DE-600)2389435-0 1673-7490 nnns volume:6 year:2011 number:1 day:29 month:12 pages:95-100 https://dx.doi.org/10.1007/s11707-012-0300-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-GEO SSG-OPC-GGO SSG-OPC-ASE GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 6 2011 1 29 12 95-100
allfieldsGer	10.1007/s11707-012-0300-8 doi (DE-627)SPR021962383 (SPR)s11707-012-0300-8-e DE-627 ger DE-627 rakwb eng 550 ASE Huang, Xianyu verfasserin aut Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Five coticolous lichen samples were collected from western Hubei Province of China to analyze the long chain n-alkanes and their carbon isotope compositions. The n-alkanes range in carbon number from $ C_{17} $ to $ C_{33} $ with strong odd-over-even predominance between $ C_{21} $ and $ C_{33} $. Lichens are dominated by n-$ C_{29} $ in the samples of Dajiuhu, Shennongjia Mountain, but by both n-$ C_{23} $ and n-$ C_{29} $ at Qizimei Mountain. This difference may result from the different environmental conditions in these two sites. The δ13C values of long chain n-alkanes in lichen samples show the signature of C3 plants. Based on compoundspecific carbon isotopic values and previous results, we state that alkane homologs >$ C_{23} $ mainly originate from the symbiotic fungi, while symbiotic algae only contribute trace amount of long chain alkanes. Of great interesting is the occurrence of long chain 3-methylalkanes in the Qizimei samples. These anteiso compounds range from $ C_{24} $ to $ C_{32} $, displaying obvious even-over-odd predominance. This study reveals that the association of long chain 3-methylalkanes with n-$ C_{23} $ alkane might be used as proxies to reconstruct the paleoecological implications of lichens in Earth history. lichen (dpeaa)DE-He213 alkane (dpeaa)DE-He213 3-methylalkanes (dpeaa)DE-He213 -C (dpeaa)DE-He213 alkane (dpeaa)DE-He213 compound specific carbon isotope (dpeaa)DE-He213 Xue, Jiantao verfasserin aut Guo, Shouyu verfasserin aut Enthalten in Frontiers of earth science in China Beijing : Higher Education Press, 2007 6(2011), 1 vom: 29. Dez., Seite 95-100 (DE-627)546007406 (DE-600)2389435-0 1673-7490 nnns volume:6 year:2011 number:1 day:29 month:12 pages:95-100 https://dx.doi.org/10.1007/s11707-012-0300-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-GEO SSG-OPC-GGO SSG-OPC-ASE GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 6 2011 1 29 12 95-100
allfieldsSound	10.1007/s11707-012-0300-8 doi (DE-627)SPR021962383 (SPR)s11707-012-0300-8-e DE-627 ger DE-627 rakwb eng 550 ASE Huang, Xianyu verfasserin aut Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Five coticolous lichen samples were collected from western Hubei Province of China to analyze the long chain n-alkanes and their carbon isotope compositions. The n-alkanes range in carbon number from $ C_{17} $ to $ C_{33} $ with strong odd-over-even predominance between $ C_{21} $ and $ C_{33} $. Lichens are dominated by n-$ C_{29} $ in the samples of Dajiuhu, Shennongjia Mountain, but by both n-$ C_{23} $ and n-$ C_{29} $ at Qizimei Mountain. This difference may result from the different environmental conditions in these two sites. The δ13C values of long chain n-alkanes in lichen samples show the signature of C3 plants. Based on compoundspecific carbon isotopic values and previous results, we state that alkane homologs >$ C_{23} $ mainly originate from the symbiotic fungi, while symbiotic algae only contribute trace amount of long chain alkanes. Of great interesting is the occurrence of long chain 3-methylalkanes in the Qizimei samples. These anteiso compounds range from $ C_{24} $ to $ C_{32} $, displaying obvious even-over-odd predominance. This study reveals that the association of long chain 3-methylalkanes with n-$ C_{23} $ alkane might be used as proxies to reconstruct the paleoecological implications of lichens in Earth history. lichen (dpeaa)DE-He213 alkane (dpeaa)DE-He213 3-methylalkanes (dpeaa)DE-He213 -C (dpeaa)DE-He213 alkane (dpeaa)DE-He213 compound specific carbon isotope (dpeaa)DE-He213 Xue, Jiantao verfasserin aut Guo, Shouyu verfasserin aut Enthalten in Frontiers of earth science in China Beijing : Higher Education Press, 2007 6(2011), 1 vom: 29. Dez., Seite 95-100 (DE-627)546007406 (DE-600)2389435-0 1673-7490 nnns volume:6 year:2011 number:1 day:29 month:12 pages:95-100 https://dx.doi.org/10.1007/s11707-012-0300-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-GEO SSG-OPC-GGO SSG-OPC-ASE GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 6 2011 1 29 12 95-100
language	English
source	Enthalten in Frontiers of earth science in China 6(2011), 1 vom: 29. Dez., Seite 95-100 volume:6 year:2011 number:1 day:29 month:12 pages:95-100
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topic_facet	lichen alkane 3-methylalkanes -C compound specific carbon isotope
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authorswithroles_txt_mv	Huang, Xianyu @@aut@@ Xue, Jiantao @@aut@@ Guo, Shouyu @@aut@@
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The n-alkanes range in carbon number from $ C_{17} $ to $ C_{33} $ with strong odd-over-even predominance between $ C_{21} $ and $ C_{33} $. Lichens are dominated by n-$ C_{29} $ in the samples of Dajiuhu, Shennongjia Mountain, but by both n-$ C_{23} $ and n-$ C_{29} $ at Qizimei Mountain. This difference may result from the different environmental conditions in these two sites. The δ13C values of long chain n-alkanes in lichen samples show the signature of C3 plants. Based on compoundspecific carbon isotopic values and previous results, we state that alkane homologs >$ C_{23} $ mainly originate from the symbiotic fungi, while symbiotic algae only contribute trace amount of long chain alkanes. Of great interesting is the occurrence of long chain 3-methylalkanes in the Qizimei samples. These anteiso compounds range from $ C_{24} $ to $ C_{32} $, displaying obvious even-over-odd predominance. 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author	Huang, Xianyu
spellingShingle	Huang, Xianyu ddc 550 misc lichen misc alkane misc 3-methylalkanes misc -C misc compound specific carbon isotope Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records
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topic_title	550 ASE Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records lichen (dpeaa)DE-He213 alkane (dpeaa)DE-He213 3-methylalkanes (dpeaa)DE-He213 -C (dpeaa)DE-He213 compound specific carbon isotope (dpeaa)DE-He213
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title	Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records
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title_full	Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records
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author_browse	Huang, Xianyu Xue, Jiantao Guo, Shouyu
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title_sort	long chain n-alkanes and their carbon isotopes in lichen species from western hubei province: implication for geological records
title_auth	Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records
abstract	Abstract Five coticolous lichen samples were collected from western Hubei Province of China to analyze the long chain n-alkanes and their carbon isotope compositions. The n-alkanes range in carbon number from $ C_{17} $ to $ C_{33} $ with strong odd-over-even predominance between $ C_{21} $ and $ C_{33} $. Lichens are dominated by n-$ C_{29} $ in the samples of Dajiuhu, Shennongjia Mountain, but by both n-$ C_{23} $ and n-$ C_{29} $ at Qizimei Mountain. This difference may result from the different environmental conditions in these two sites. The δ13C values of long chain n-alkanes in lichen samples show the signature of C3 plants. Based on compoundspecific carbon isotopic values and previous results, we state that alkane homologs >$ C_{23} $ mainly originate from the symbiotic fungi, while symbiotic algae only contribute trace amount of long chain alkanes. Of great interesting is the occurrence of long chain 3-methylalkanes in the Qizimei samples. These anteiso compounds range from $ C_{24} $ to $ C_{32} $, displaying obvious even-over-odd predominance. This study reveals that the association of long chain 3-methylalkanes with n-$ C_{23} $ alkane might be used as proxies to reconstruct the paleoecological implications of lichens in Earth history.
abstractGer	Abstract Five coticolous lichen samples were collected from western Hubei Province of China to analyze the long chain n-alkanes and their carbon isotope compositions. The n-alkanes range in carbon number from $ C_{17} $ to $ C_{33} $ with strong odd-over-even predominance between $ C_{21} $ and $ C_{33} $. Lichens are dominated by n-$ C_{29} $ in the samples of Dajiuhu, Shennongjia Mountain, but by both n-$ C_{23} $ and n-$ C_{29} $ at Qizimei Mountain. This difference may result from the different environmental conditions in these two sites. The δ13C values of long chain n-alkanes in lichen samples show the signature of C3 plants. Based on compoundspecific carbon isotopic values and previous results, we state that alkane homologs >$ C_{23} $ mainly originate from the symbiotic fungi, while symbiotic algae only contribute trace amount of long chain alkanes. Of great interesting is the occurrence of long chain 3-methylalkanes in the Qizimei samples. These anteiso compounds range from $ C_{24} $ to $ C_{32} $, displaying obvious even-over-odd predominance. This study reveals that the association of long chain 3-methylalkanes with n-$ C_{23} $ alkane might be used as proxies to reconstruct the paleoecological implications of lichens in Earth history.
abstract_unstemmed	Abstract Five coticolous lichen samples were collected from western Hubei Province of China to analyze the long chain n-alkanes and their carbon isotope compositions. The n-alkanes range in carbon number from $ C_{17} $ to $ C_{33} $ with strong odd-over-even predominance between $ C_{21} $ and $ C_{33} $. Lichens are dominated by n-$ C_{29} $ in the samples of Dajiuhu, Shennongjia Mountain, but by both n-$ C_{23} $ and n-$ C_{29} $ at Qizimei Mountain. This difference may result from the different environmental conditions in these two sites. The δ13C values of long chain n-alkanes in lichen samples show the signature of C3 plants. Based on compoundspecific carbon isotopic values and previous results, we state that alkane homologs >$ C_{23} $ mainly originate from the symbiotic fungi, while symbiotic algae only contribute trace amount of long chain alkanes. Of great interesting is the occurrence of long chain 3-methylalkanes in the Qizimei samples. These anteiso compounds range from $ C_{24} $ to $ C_{32} $, displaying obvious even-over-odd predominance. This study reveals that the association of long chain 3-methylalkanes with n-$ C_{23} $ alkane might be used as proxies to reconstruct the paleoecological implications of lichens in Earth history.
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title_short	Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records
url	https://dx.doi.org/10.1007/s11707-012-0300-8
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author2	Xue, Jiantao Guo, Shouyu
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doi_str	10.1007/s11707-012-0300-8
up_date	2024-07-04T01:12:03.251Z
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The n-alkanes range in carbon number from $ C_{17} $ to $ C_{33} $ with strong odd-over-even predominance between $ C_{21} $ and $ C_{33} $. Lichens are dominated by n-$ C_{29} $ in the samples of Dajiuhu, Shennongjia Mountain, but by both n-$ C_{23} $ and n-$ C_{29} $ at Qizimei Mountain. This difference may result from the different environmental conditions in these two sites. The δ13C values of long chain n-alkanes in lichen samples show the signature of C3 plants. Based on compoundspecific carbon isotopic values and previous results, we state that alkane homologs >$ C_{23} $ mainly originate from the symbiotic fungi, while symbiotic algae only contribute trace amount of long chain alkanes. Of great interesting is the occurrence of long chain 3-methylalkanes in the Qizimei samples. These anteiso compounds range from $ C_{24} $ to $ C_{32} $, displaying obvious even-over-odd predominance. 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Long chain n-alkanes and their carbon isotopes in lichen species from western Hubei Province: implication for geological records

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