Island ecosystem responses to the Kuwae eruption and precipitation change over the last 1600 years, Efate, Vanuatu
IntroductionIslands of the Southwest Pacific are exposed to geologic and climate-related disturbances that occur on a range of timescales and which probably affect, to varying degrees, their terrestrial ecosystems. Over the past ∼1100 years we know of two major events in the region: the Kuwae erupti...
Ausführliche Beschreibung
Autor*in: |
Nichola A. Strandberg [verfasserIn] David A. Sear [verfasserIn] Peter G. Langdon [verfasserIn] Shane J. Cronin [verfasserIn] Catherine T. Langdon [verfasserIn] Ashley E. Maloney [verfasserIn] Samantha L. Bateman [verfasserIn] Thomas Bishop [verfasserIn] Ian W. Croudace [verfasserIn] Melanie J. Leng [verfasserIn] Julian P. Sachs [verfasserIn] Matiu Prebble [verfasserIn] William D. Gosling [verfasserIn] Mary Edwards [verfasserIn] Sandra Nogué [verfasserIn] |
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E-Artikel |
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Englisch |
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2023 |
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In: Frontiers in Ecology and Evolution - Frontiers Media S.A., 2014, 11(2023) |
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volume:11 ; year:2023 |
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DOI / URN: |
10.3389/fevo.2023.1087577 |
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Katalog-ID: |
DOAJ081939329 |
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520 | |a IntroductionIslands of the Southwest Pacific are exposed to geologic and climate-related disturbances that occur on a range of timescales and which probably affect, to varying degrees, their terrestrial ecosystems. Over the past ∼1100 years we know of two major events in the region: the Kuwae eruption which is thought to have occurred ∼500 cal. years BP and a shift to drier conditions which began ∼1100 cal. years BP.MethodsWe investigated terrestrial and lacustrine ecosystem responses to these events and also to a changing fire regime, likely human-caused, using a multi-proxy (C/N, charcoal, chironomids, pollen, and tephra) record from Lake Emaotul, Efate, Vanuatu.ResultsTephra from the Kuwae eruption was found across a 6 cm layer which our age-depth model suggests was deposited 650–510 cal. years BP (95% confidence). Forest and chironomid community turnover increased during the wet-dry shift 1100–1000 cal. years BP; subsequently, chironomid turnover rates decreased again within <135 years and vegetation had partially (but not fully) recovered after ∼80 years. Following Kuwae volcanic tephra deposition, vegetation turnover increased again, reflecting a reduction in small trees and shrubs and an increase in grasses. Subsequently, the forest vegetation did not regain its previous composition, whereas chironomid community composition remained fairly stable before and after tephra deposition. Within the last ∼90 years, enhanced local burning drove another increase in vegetation turnover.DiscussionTerrestrial and freshwater ecosystems in Efate are sensitive to changes in hydroclimate, volcanism, and anthropogenic fires, although to different degrees; while recent human impacts are often obvious, volcanic eruptions and climatic shifts have also structured Pacific-island ecosystems and will continue to do so. | ||
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700 | 0 | |a Peter G. Langdon |e verfasserin |4 aut | |
700 | 0 | |a Shane J. Cronin |e verfasserin |4 aut | |
700 | 0 | |a Catherine T. Langdon |e verfasserin |4 aut | |
700 | 0 | |a Ashley E. Maloney |e verfasserin |4 aut | |
700 | 0 | |a Ashley E. Maloney |e verfasserin |4 aut | |
700 | 0 | |a Samantha L. Bateman |e verfasserin |4 aut | |
700 | 0 | |a Thomas Bishop |e verfasserin |4 aut | |
700 | 0 | |a Ian W. Croudace |e verfasserin |4 aut | |
700 | 0 | |a Melanie J. Leng |e verfasserin |4 aut | |
700 | 0 | |a Melanie J. Leng |e verfasserin |4 aut | |
700 | 0 | |a Julian P. Sachs |e verfasserin |4 aut | |
700 | 0 | |a Matiu Prebble |e verfasserin |4 aut | |
700 | 0 | |a Matiu Prebble |e verfasserin |4 aut | |
700 | 0 | |a William D. Gosling |e verfasserin |4 aut | |
700 | 0 | |a Mary Edwards |e verfasserin |4 aut | |
700 | 0 | |a Sandra Nogué |e verfasserin |4 aut | |
700 | 0 | |a Sandra Nogué |e verfasserin |4 aut | |
700 | 0 | |a Sandra Nogué |e verfasserin |4 aut | |
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10.3389/fevo.2023.1087577 doi (DE-627)DOAJ081939329 (DE-599)DOAJ293746377cc64ec1998091bcea4a7f51 DE-627 ger DE-627 rakwb eng QH359-425 QH540-549.5 Nichola A. Strandberg verfasserin aut Island ecosystem responses to the Kuwae eruption and precipitation change over the last 1600 years, Efate, Vanuatu 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier IntroductionIslands of the Southwest Pacific are exposed to geologic and climate-related disturbances that occur on a range of timescales and which probably affect, to varying degrees, their terrestrial ecosystems. Over the past ∼1100 years we know of two major events in the region: the Kuwae eruption which is thought to have occurred ∼500 cal. years BP and a shift to drier conditions which began ∼1100 cal. years BP.MethodsWe investigated terrestrial and lacustrine ecosystem responses to these events and also to a changing fire regime, likely human-caused, using a multi-proxy (C/N, charcoal, chironomids, pollen, and tephra) record from Lake Emaotul, Efate, Vanuatu.ResultsTephra from the Kuwae eruption was found across a 6 cm layer which our age-depth model suggests was deposited 650–510 cal. years BP (95% confidence). Forest and chironomid community turnover increased during the wet-dry shift 1100–1000 cal. years BP; subsequently, chironomid turnover rates decreased again within <135 years and vegetation had partially (but not fully) recovered after ∼80 years. Following Kuwae volcanic tephra deposition, vegetation turnover increased again, reflecting a reduction in small trees and shrubs and an increase in grasses. Subsequently, the forest vegetation did not regain its previous composition, whereas chironomid community composition remained fairly stable before and after tephra deposition. Within the last ∼90 years, enhanced local burning drove another increase in vegetation turnover.DiscussionTerrestrial and freshwater ecosystems in Efate are sensitive to changes in hydroclimate, volcanism, and anthropogenic fires, although to different degrees; while recent human impacts are often obvious, volcanic eruptions and climatic shifts have also structured Pacific-island ecosystems and will continue to do so. chironomids fossil pollen Kuwae eruption South Pacific Convergence Zone (SPCZ) tephra Vanuatu Evolution Ecology David A. Sear verfasserin aut Peter G. Langdon verfasserin aut Shane J. Cronin verfasserin aut Catherine T. Langdon verfasserin aut Ashley E. Maloney verfasserin aut Ashley E. Maloney verfasserin aut Samantha L. Bateman verfasserin aut Thomas Bishop verfasserin aut Ian W. Croudace verfasserin aut Melanie J. Leng verfasserin aut Melanie J. Leng verfasserin aut Julian P. Sachs verfasserin aut Matiu Prebble verfasserin aut Matiu Prebble verfasserin aut William D. Gosling verfasserin aut Mary Edwards verfasserin aut Sandra Nogué verfasserin aut Sandra Nogué verfasserin aut Sandra Nogué verfasserin aut In Frontiers in Ecology and Evolution Frontiers Media S.A., 2014 11(2023) (DE-627)774108215 (DE-600)2745634-1 2296701X nnns volume:11 year:2023 https://doi.org/10.3389/fevo.2023.1087577 kostenfrei https://doaj.org/article/293746377cc64ec1998091bcea4a7f51 kostenfrei https://www.frontiersin.org/articles/10.3389/fevo.2023.1087577/full kostenfrei https://doaj.org/toc/2296-701X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 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_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 11 2023 |
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10.3389/fevo.2023.1087577 doi (DE-627)DOAJ081939329 (DE-599)DOAJ293746377cc64ec1998091bcea4a7f51 DE-627 ger DE-627 rakwb eng QH359-425 QH540-549.5 Nichola A. Strandberg verfasserin aut Island ecosystem responses to the Kuwae eruption and precipitation change over the last 1600 years, Efate, Vanuatu 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier IntroductionIslands of the Southwest Pacific are exposed to geologic and climate-related disturbances that occur on a range of timescales and which probably affect, to varying degrees, their terrestrial ecosystems. Over the past ∼1100 years we know of two major events in the region: the Kuwae eruption which is thought to have occurred ∼500 cal. years BP and a shift to drier conditions which began ∼1100 cal. years BP.MethodsWe investigated terrestrial and lacustrine ecosystem responses to these events and also to a changing fire regime, likely human-caused, using a multi-proxy (C/N, charcoal, chironomids, pollen, and tephra) record from Lake Emaotul, Efate, Vanuatu.ResultsTephra from the Kuwae eruption was found across a 6 cm layer which our age-depth model suggests was deposited 650–510 cal. years BP (95% confidence). Forest and chironomid community turnover increased during the wet-dry shift 1100–1000 cal. years BP; subsequently, chironomid turnover rates decreased again within <135 years and vegetation had partially (but not fully) recovered after ∼80 years. Following Kuwae volcanic tephra deposition, vegetation turnover increased again, reflecting a reduction in small trees and shrubs and an increase in grasses. Subsequently, the forest vegetation did not regain its previous composition, whereas chironomid community composition remained fairly stable before and after tephra deposition. Within the last ∼90 years, enhanced local burning drove another increase in vegetation turnover.DiscussionTerrestrial and freshwater ecosystems in Efate are sensitive to changes in hydroclimate, volcanism, and anthropogenic fires, although to different degrees; while recent human impacts are often obvious, volcanic eruptions and climatic shifts have also structured Pacific-island ecosystems and will continue to do so. chironomids fossil pollen Kuwae eruption South Pacific Convergence Zone (SPCZ) tephra Vanuatu Evolution Ecology David A. Sear verfasserin aut Peter G. Langdon verfasserin aut Shane J. Cronin verfasserin aut Catherine T. Langdon verfasserin aut Ashley E. Maloney verfasserin aut Ashley E. Maloney verfasserin aut Samantha L. Bateman verfasserin aut Thomas Bishop verfasserin aut Ian W. Croudace verfasserin aut Melanie J. Leng verfasserin aut Melanie J. Leng verfasserin aut Julian P. Sachs verfasserin aut Matiu Prebble verfasserin aut Matiu Prebble verfasserin aut William D. Gosling verfasserin aut Mary Edwards verfasserin aut Sandra Nogué verfasserin aut Sandra Nogué verfasserin aut Sandra Nogué verfasserin aut In Frontiers in Ecology and Evolution Frontiers Media S.A., 2014 11(2023) (DE-627)774108215 (DE-600)2745634-1 2296701X nnns volume:11 year:2023 https://doi.org/10.3389/fevo.2023.1087577 kostenfrei https://doaj.org/article/293746377cc64ec1998091bcea4a7f51 kostenfrei https://www.frontiersin.org/articles/10.3389/fevo.2023.1087577/full kostenfrei https://doaj.org/toc/2296-701X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 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_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 11 2023 |
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10.3389/fevo.2023.1087577 doi (DE-627)DOAJ081939329 (DE-599)DOAJ293746377cc64ec1998091bcea4a7f51 DE-627 ger DE-627 rakwb eng QH359-425 QH540-549.5 Nichola A. Strandberg verfasserin aut Island ecosystem responses to the Kuwae eruption and precipitation change over the last 1600 years, Efate, Vanuatu 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier IntroductionIslands of the Southwest Pacific are exposed to geologic and climate-related disturbances that occur on a range of timescales and which probably affect, to varying degrees, their terrestrial ecosystems. Over the past ∼1100 years we know of two major events in the region: the Kuwae eruption which is thought to have occurred ∼500 cal. years BP and a shift to drier conditions which began ∼1100 cal. years BP.MethodsWe investigated terrestrial and lacustrine ecosystem responses to these events and also to a changing fire regime, likely human-caused, using a multi-proxy (C/N, charcoal, chironomids, pollen, and tephra) record from Lake Emaotul, Efate, Vanuatu.ResultsTephra from the Kuwae eruption was found across a 6 cm layer which our age-depth model suggests was deposited 650–510 cal. years BP (95% confidence). Forest and chironomid community turnover increased during the wet-dry shift 1100–1000 cal. years BP; subsequently, chironomid turnover rates decreased again within <135 years and vegetation had partially (but not fully) recovered after ∼80 years. Following Kuwae volcanic tephra deposition, vegetation turnover increased again, reflecting a reduction in small trees and shrubs and an increase in grasses. Subsequently, the forest vegetation did not regain its previous composition, whereas chironomid community composition remained fairly stable before and after tephra deposition. Within the last ∼90 years, enhanced local burning drove another increase in vegetation turnover.DiscussionTerrestrial and freshwater ecosystems in Efate are sensitive to changes in hydroclimate, volcanism, and anthropogenic fires, although to different degrees; while recent human impacts are often obvious, volcanic eruptions and climatic shifts have also structured Pacific-island ecosystems and will continue to do so. chironomids fossil pollen Kuwae eruption South Pacific Convergence Zone (SPCZ) tephra Vanuatu Evolution Ecology David A. Sear verfasserin aut Peter G. Langdon verfasserin aut Shane J. Cronin verfasserin aut Catherine T. Langdon verfasserin aut Ashley E. Maloney verfasserin aut Ashley E. Maloney verfasserin aut Samantha L. Bateman verfasserin aut Thomas Bishop verfasserin aut Ian W. Croudace verfasserin aut Melanie J. Leng verfasserin aut Melanie J. Leng verfasserin aut Julian P. Sachs verfasserin aut Matiu Prebble verfasserin aut Matiu Prebble verfasserin aut William D. Gosling verfasserin aut Mary Edwards verfasserin aut Sandra Nogué verfasserin aut Sandra Nogué verfasserin aut Sandra Nogué verfasserin aut In Frontiers in Ecology and Evolution Frontiers Media S.A., 2014 11(2023) (DE-627)774108215 (DE-600)2745634-1 2296701X nnns volume:11 year:2023 https://doi.org/10.3389/fevo.2023.1087577 kostenfrei https://doaj.org/article/293746377cc64ec1998091bcea4a7f51 kostenfrei https://www.frontiersin.org/articles/10.3389/fevo.2023.1087577/full kostenfrei https://doaj.org/toc/2296-701X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 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_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 11 2023 |
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10.3389/fevo.2023.1087577 doi (DE-627)DOAJ081939329 (DE-599)DOAJ293746377cc64ec1998091bcea4a7f51 DE-627 ger DE-627 rakwb eng QH359-425 QH540-549.5 Nichola A. Strandberg verfasserin aut Island ecosystem responses to the Kuwae eruption and precipitation change over the last 1600 years, Efate, Vanuatu 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier IntroductionIslands of the Southwest Pacific are exposed to geologic and climate-related disturbances that occur on a range of timescales and which probably affect, to varying degrees, their terrestrial ecosystems. Over the past ∼1100 years we know of two major events in the region: the Kuwae eruption which is thought to have occurred ∼500 cal. years BP and a shift to drier conditions which began ∼1100 cal. years BP.MethodsWe investigated terrestrial and lacustrine ecosystem responses to these events and also to a changing fire regime, likely human-caused, using a multi-proxy (C/N, charcoal, chironomids, pollen, and tephra) record from Lake Emaotul, Efate, Vanuatu.ResultsTephra from the Kuwae eruption was found across a 6 cm layer which our age-depth model suggests was deposited 650–510 cal. years BP (95% confidence). Forest and chironomid community turnover increased during the wet-dry shift 1100–1000 cal. years BP; subsequently, chironomid turnover rates decreased again within <135 years and vegetation had partially (but not fully) recovered after ∼80 years. Following Kuwae volcanic tephra deposition, vegetation turnover increased again, reflecting a reduction in small trees and shrubs and an increase in grasses. Subsequently, the forest vegetation did not regain its previous composition, whereas chironomid community composition remained fairly stable before and after tephra deposition. Within the last ∼90 years, enhanced local burning drove another increase in vegetation turnover.DiscussionTerrestrial and freshwater ecosystems in Efate are sensitive to changes in hydroclimate, volcanism, and anthropogenic fires, although to different degrees; while recent human impacts are often obvious, volcanic eruptions and climatic shifts have also structured Pacific-island ecosystems and will continue to do so. chironomids fossil pollen Kuwae eruption South Pacific Convergence Zone (SPCZ) tephra Vanuatu Evolution Ecology David A. Sear verfasserin aut Peter G. Langdon verfasserin aut Shane J. Cronin verfasserin aut Catherine T. Langdon verfasserin aut Ashley E. Maloney verfasserin aut Ashley E. Maloney verfasserin aut Samantha L. Bateman verfasserin aut Thomas Bishop verfasserin aut Ian W. Croudace verfasserin aut Melanie J. Leng verfasserin aut Melanie J. Leng verfasserin aut Julian P. Sachs verfasserin aut Matiu Prebble verfasserin aut Matiu Prebble verfasserin aut William D. Gosling verfasserin aut Mary Edwards verfasserin aut Sandra Nogué verfasserin aut Sandra Nogué verfasserin aut Sandra Nogué verfasserin aut In Frontiers in Ecology and Evolution Frontiers Media S.A., 2014 11(2023) (DE-627)774108215 (DE-600)2745634-1 2296701X nnns volume:11 year:2023 https://doi.org/10.3389/fevo.2023.1087577 kostenfrei https://doaj.org/article/293746377cc64ec1998091bcea4a7f51 kostenfrei https://www.frontiersin.org/articles/10.3389/fevo.2023.1087577/full kostenfrei https://doaj.org/toc/2296-701X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 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_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 11 2023 |
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10.3389/fevo.2023.1087577 doi (DE-627)DOAJ081939329 (DE-599)DOAJ293746377cc64ec1998091bcea4a7f51 DE-627 ger DE-627 rakwb eng QH359-425 QH540-549.5 Nichola A. Strandberg verfasserin aut Island ecosystem responses to the Kuwae eruption and precipitation change over the last 1600 years, Efate, Vanuatu 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier IntroductionIslands of the Southwest Pacific are exposed to geologic and climate-related disturbances that occur on a range of timescales and which probably affect, to varying degrees, their terrestrial ecosystems. Over the past ∼1100 years we know of two major events in the region: the Kuwae eruption which is thought to have occurred ∼500 cal. years BP and a shift to drier conditions which began ∼1100 cal. years BP.MethodsWe investigated terrestrial and lacustrine ecosystem responses to these events and also to a changing fire regime, likely human-caused, using a multi-proxy (C/N, charcoal, chironomids, pollen, and tephra) record from Lake Emaotul, Efate, Vanuatu.ResultsTephra from the Kuwae eruption was found across a 6 cm layer which our age-depth model suggests was deposited 650–510 cal. years BP (95% confidence). Forest and chironomid community turnover increased during the wet-dry shift 1100–1000 cal. years BP; subsequently, chironomid turnover rates decreased again within <135 years and vegetation had partially (but not fully) recovered after ∼80 years. Following Kuwae volcanic tephra deposition, vegetation turnover increased again, reflecting a reduction in small trees and shrubs and an increase in grasses. Subsequently, the forest vegetation did not regain its previous composition, whereas chironomid community composition remained fairly stable before and after tephra deposition. Within the last ∼90 years, enhanced local burning drove another increase in vegetation turnover.DiscussionTerrestrial and freshwater ecosystems in Efate are sensitive to changes in hydroclimate, volcanism, and anthropogenic fires, although to different degrees; while recent human impacts are often obvious, volcanic eruptions and climatic shifts have also structured Pacific-island ecosystems and will continue to do so. chironomids fossil pollen Kuwae eruption South Pacific Convergence Zone (SPCZ) tephra Vanuatu Evolution Ecology David A. Sear verfasserin aut Peter G. Langdon verfasserin aut Shane J. Cronin verfasserin aut Catherine T. Langdon verfasserin aut Ashley E. Maloney verfasserin aut Ashley E. Maloney verfasserin aut Samantha L. Bateman verfasserin aut Thomas Bishop verfasserin aut Ian W. Croudace verfasserin aut Melanie J. Leng verfasserin aut Melanie J. Leng verfasserin aut Julian P. Sachs verfasserin aut Matiu Prebble verfasserin aut Matiu Prebble verfasserin aut William D. Gosling verfasserin aut Mary Edwards verfasserin aut Sandra Nogué verfasserin aut Sandra Nogué verfasserin aut Sandra Nogué verfasserin aut In Frontiers in Ecology and Evolution Frontiers Media S.A., 2014 11(2023) (DE-627)774108215 (DE-600)2745634-1 2296701X nnns volume:11 year:2023 https://doi.org/10.3389/fevo.2023.1087577 kostenfrei https://doaj.org/article/293746377cc64ec1998091bcea4a7f51 kostenfrei https://www.frontiersin.org/articles/10.3389/fevo.2023.1087577/full kostenfrei https://doaj.org/toc/2296-701X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 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_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 11 2023 |
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Island ecosystem responses to the Kuwae eruption and precipitation change over the last 1600 years, Efate, Vanuatu |
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Island ecosystem responses to the Kuwae eruption and precipitation change over the last 1600 years, Efate, Vanuatu |
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Nichola A. Strandberg |
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Frontiers in Ecology and Evolution |
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Nichola A. Strandberg David A. Sear Peter G. Langdon Shane J. Cronin Catherine T. Langdon Ashley E. Maloney Samantha L. Bateman Thomas Bishop Ian W. Croudace Melanie J. Leng Julian P. Sachs Matiu Prebble William D. Gosling Mary Edwards Sandra Nogué |
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10.3389/fevo.2023.1087577 |
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island ecosystem responses to the kuwae eruption and precipitation change over the last 1600 years, efate, vanuatu |
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Island ecosystem responses to the Kuwae eruption and precipitation change over the last 1600 years, Efate, Vanuatu |
abstract |
IntroductionIslands of the Southwest Pacific are exposed to geologic and climate-related disturbances that occur on a range of timescales and which probably affect, to varying degrees, their terrestrial ecosystems. Over the past ∼1100 years we know of two major events in the region: the Kuwae eruption which is thought to have occurred ∼500 cal. years BP and a shift to drier conditions which began ∼1100 cal. years BP.MethodsWe investigated terrestrial and lacustrine ecosystem responses to these events and also to a changing fire regime, likely human-caused, using a multi-proxy (C/N, charcoal, chironomids, pollen, and tephra) record from Lake Emaotul, Efate, Vanuatu.ResultsTephra from the Kuwae eruption was found across a 6 cm layer which our age-depth model suggests was deposited 650–510 cal. years BP (95% confidence). Forest and chironomid community turnover increased during the wet-dry shift 1100–1000 cal. years BP; subsequently, chironomid turnover rates decreased again within <135 years and vegetation had partially (but not fully) recovered after ∼80 years. Following Kuwae volcanic tephra deposition, vegetation turnover increased again, reflecting a reduction in small trees and shrubs and an increase in grasses. Subsequently, the forest vegetation did not regain its previous composition, whereas chironomid community composition remained fairly stable before and after tephra deposition. Within the last ∼90 years, enhanced local burning drove another increase in vegetation turnover.DiscussionTerrestrial and freshwater ecosystems in Efate are sensitive to changes in hydroclimate, volcanism, and anthropogenic fires, although to different degrees; while recent human impacts are often obvious, volcanic eruptions and climatic shifts have also structured Pacific-island ecosystems and will continue to do so. |
abstractGer |
IntroductionIslands of the Southwest Pacific are exposed to geologic and climate-related disturbances that occur on a range of timescales and which probably affect, to varying degrees, their terrestrial ecosystems. Over the past ∼1100 years we know of two major events in the region: the Kuwae eruption which is thought to have occurred ∼500 cal. years BP and a shift to drier conditions which began ∼1100 cal. years BP.MethodsWe investigated terrestrial and lacustrine ecosystem responses to these events and also to a changing fire regime, likely human-caused, using a multi-proxy (C/N, charcoal, chironomids, pollen, and tephra) record from Lake Emaotul, Efate, Vanuatu.ResultsTephra from the Kuwae eruption was found across a 6 cm layer which our age-depth model suggests was deposited 650–510 cal. years BP (95% confidence). Forest and chironomid community turnover increased during the wet-dry shift 1100–1000 cal. years BP; subsequently, chironomid turnover rates decreased again within <135 years and vegetation had partially (but not fully) recovered after ∼80 years. Following Kuwae volcanic tephra deposition, vegetation turnover increased again, reflecting a reduction in small trees and shrubs and an increase in grasses. Subsequently, the forest vegetation did not regain its previous composition, whereas chironomid community composition remained fairly stable before and after tephra deposition. Within the last ∼90 years, enhanced local burning drove another increase in vegetation turnover.DiscussionTerrestrial and freshwater ecosystems in Efate are sensitive to changes in hydroclimate, volcanism, and anthropogenic fires, although to different degrees; while recent human impacts are often obvious, volcanic eruptions and climatic shifts have also structured Pacific-island ecosystems and will continue to do so. |
abstract_unstemmed |
IntroductionIslands of the Southwest Pacific are exposed to geologic and climate-related disturbances that occur on a range of timescales and which probably affect, to varying degrees, their terrestrial ecosystems. Over the past ∼1100 years we know of two major events in the region: the Kuwae eruption which is thought to have occurred ∼500 cal. years BP and a shift to drier conditions which began ∼1100 cal. years BP.MethodsWe investigated terrestrial and lacustrine ecosystem responses to these events and also to a changing fire regime, likely human-caused, using a multi-proxy (C/N, charcoal, chironomids, pollen, and tephra) record from Lake Emaotul, Efate, Vanuatu.ResultsTephra from the Kuwae eruption was found across a 6 cm layer which our age-depth model suggests was deposited 650–510 cal. years BP (95% confidence). Forest and chironomid community turnover increased during the wet-dry shift 1100–1000 cal. years BP; subsequently, chironomid turnover rates decreased again within <135 years and vegetation had partially (but not fully) recovered after ∼80 years. Following Kuwae volcanic tephra deposition, vegetation turnover increased again, reflecting a reduction in small trees and shrubs and an increase in grasses. Subsequently, the forest vegetation did not regain its previous composition, whereas chironomid community composition remained fairly stable before and after tephra deposition. Within the last ∼90 years, enhanced local burning drove another increase in vegetation turnover.DiscussionTerrestrial and freshwater ecosystems in Efate are sensitive to changes in hydroclimate, volcanism, and anthropogenic fires, although to different degrees; while recent human impacts are often obvious, volcanic eruptions and climatic shifts have also structured Pacific-island ecosystems and will continue to do so. |
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title_short |
Island ecosystem responses to the Kuwae eruption and precipitation change over the last 1600 years, Efate, Vanuatu |
url |
https://doi.org/10.3389/fevo.2023.1087577 https://doaj.org/article/293746377cc64ec1998091bcea4a7f51 https://www.frontiersin.org/articles/10.3389/fevo.2023.1087577/full https://doaj.org/toc/2296-701X |
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David A. Sear Peter G. Langdon Shane J. Cronin Catherine T. Langdon Ashley E. Maloney Samantha L. Bateman Thomas Bishop Ian W. Croudace Melanie J. Leng Julian P. Sachs Matiu Prebble William D. Gosling Mary Edwards Sandra Nogué |
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