Response of plant communities to climate change during the late Holocene: Palaeoecological insights from peatlands in the Alaskan Arctic
High-resolution plant macrofossil records were examined alongside pollen, micro- and macro-charcoal, and testate amoeba data to elucidate the dynamics of two permafrost peatlands in the northern foothills of the Brooks Range, Alaskan Arctic. The vegetation dynamics of these two peatlands were driven...
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Language: | English |
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2018
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Online Access: | https://pure.qub.ac.uk/en/publications/d9f3b2bd-a670-49f7-ba0c-b8624cf895d0 https://doi.org/10.1016/j.ecolind.2017.10.062 |
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ftqueensubelpubl:oai:pure.qub.ac.uk/portal:publications/d9f3b2bd-a670-49f7-ba0c-b8624cf895d0 2024-09-15T17:50:52+00:00 Response of plant communities to climate change during the late Holocene: Palaeoecological insights from peatlands in the Alaskan Arctic Gałka, Mariusz Swindles, Graeme T. Szal, Marta Fulweber, Randy Feurdean, Angelica 2018-02-01 https://pure.qub.ac.uk/en/publications/d9f3b2bd-a670-49f7-ba0c-b8624cf895d0 https://doi.org/10.1016/j.ecolind.2017.10.062 eng eng https://pure.qub.ac.uk/en/publications/d9f3b2bd-a670-49f7-ba0c-b8624cf895d0 info:eu-repo/semantics/closedAccess Gałka , M , Swindles , G T , Szal , M , Fulweber , R & Feurdean , A 2018 , ' Response of plant communities to climate change during the late Holocene: Palaeoecological insights from peatlands in the Alaskan Arctic ' , Ecological Indicators , vol. 85 , pp. 525-536 . https://doi.org/10.1016/j.ecolind.2017.10.062 Climate change Fire Global warming Permafrost Shrub expansion Sphagnum /dk/atira/pure/subjectarea/asjc/1800/1800 name=General Decision Sciences /dk/atira/pure/subjectarea/asjc/1100/1105 name=Ecology Evolution Behavior and Systematics /dk/atira/pure/subjectarea/asjc/2300/2303 /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2018 ftqueensubelpubl https://doi.org/10.1016/j.ecolind.2017.10.062 2024-06-25T14:27:07Z High-resolution plant macrofossil records were examined alongside pollen, micro- and macro-charcoal, and testate amoeba data to elucidate the dynamics of two permafrost peatlands in the northern foothills of the Brooks Range, Alaskan Arctic. The vegetation dynamics of these two peatlands were driven by autogenic processes reflecting the development trajectory of the peatlands towards ombrotrophic status, and allogenic climate change. We observe an increase in shrub pollen and macrofossils (e.g. Ericaceae, Betula nana) during two Late Holocene warm episodes and in recent decades. Pollen data suggest that regional forest cover also responded to temperature increase since ca. 1950 CE. An increase of Picea pollen (up to 13%) in the upper part of peat profile is probably associated with long distance pollen transport from populations of Picea mariana and Picea glauca located at the southern foothills of the Brooks Range. Relatively small amount of micro- and macrocharcoal in the two profiles indicates little fire activity around the sampling sites over the last ca. 2000 years, which is in agreement with regional findings. The lack of surface and groundwater influence under prolonged warmer/drier condition can allow Sphagnum to expand in Arctic peatlands. Cold climatic conditions might have been detrimental to Sphagnum populations, that were replaced by Carex spp. and other vascular plants owing to wetter conditions in the peatland. Article in Journal/Newspaper Arctic Betula nana Brooks Range Climate change Global warming permafrost Queen's University Belfast Research Portal Ecological Indicators 85 525 536 |
institution |
Open Polar |
collection |
Queen's University Belfast Research Portal |
op_collection_id |
ftqueensubelpubl |
language |
English |
topic |
Climate change Fire Global warming Permafrost Shrub expansion Sphagnum /dk/atira/pure/subjectarea/asjc/1800/1800 name=General Decision Sciences /dk/atira/pure/subjectarea/asjc/1100/1105 name=Ecology Evolution Behavior and Systematics /dk/atira/pure/subjectarea/asjc/2300/2303 /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
Climate change Fire Global warming Permafrost Shrub expansion Sphagnum /dk/atira/pure/subjectarea/asjc/1800/1800 name=General Decision Sciences /dk/atira/pure/subjectarea/asjc/1100/1105 name=Ecology Evolution Behavior and Systematics /dk/atira/pure/subjectarea/asjc/2300/2303 /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Gałka, Mariusz Swindles, Graeme T. Szal, Marta Fulweber, Randy Feurdean, Angelica Response of plant communities to climate change during the late Holocene: Palaeoecological insights from peatlands in the Alaskan Arctic |
topic_facet |
Climate change Fire Global warming Permafrost Shrub expansion Sphagnum /dk/atira/pure/subjectarea/asjc/1800/1800 name=General Decision Sciences /dk/atira/pure/subjectarea/asjc/1100/1105 name=Ecology Evolution Behavior and Systematics /dk/atira/pure/subjectarea/asjc/2300/2303 /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
High-resolution plant macrofossil records were examined alongside pollen, micro- and macro-charcoal, and testate amoeba data to elucidate the dynamics of two permafrost peatlands in the northern foothills of the Brooks Range, Alaskan Arctic. The vegetation dynamics of these two peatlands were driven by autogenic processes reflecting the development trajectory of the peatlands towards ombrotrophic status, and allogenic climate change. We observe an increase in shrub pollen and macrofossils (e.g. Ericaceae, Betula nana) during two Late Holocene warm episodes and in recent decades. Pollen data suggest that regional forest cover also responded to temperature increase since ca. 1950 CE. An increase of Picea pollen (up to 13%) in the upper part of peat profile is probably associated with long distance pollen transport from populations of Picea mariana and Picea glauca located at the southern foothills of the Brooks Range. Relatively small amount of micro- and macrocharcoal in the two profiles indicates little fire activity around the sampling sites over the last ca. 2000 years, which is in agreement with regional findings. The lack of surface and groundwater influence under prolonged warmer/drier condition can allow Sphagnum to expand in Arctic peatlands. Cold climatic conditions might have been detrimental to Sphagnum populations, that were replaced by Carex spp. and other vascular plants owing to wetter conditions in the peatland. |
format |
Article in Journal/Newspaper |
author |
Gałka, Mariusz Swindles, Graeme T. Szal, Marta Fulweber, Randy Feurdean, Angelica |
author_facet |
Gałka, Mariusz Swindles, Graeme T. Szal, Marta Fulweber, Randy Feurdean, Angelica |
author_sort |
Gałka, Mariusz |
title |
Response of plant communities to climate change during the late Holocene: Palaeoecological insights from peatlands in the Alaskan Arctic |
title_short |
Response of plant communities to climate change during the late Holocene: Palaeoecological insights from peatlands in the Alaskan Arctic |
title_full |
Response of plant communities to climate change during the late Holocene: Palaeoecological insights from peatlands in the Alaskan Arctic |
title_fullStr |
Response of plant communities to climate change during the late Holocene: Palaeoecological insights from peatlands in the Alaskan Arctic |
title_full_unstemmed |
Response of plant communities to climate change during the late Holocene: Palaeoecological insights from peatlands in the Alaskan Arctic |
title_sort |
response of plant communities to climate change during the late holocene: palaeoecological insights from peatlands in the alaskan arctic |
publishDate |
2018 |
url |
https://pure.qub.ac.uk/en/publications/d9f3b2bd-a670-49f7-ba0c-b8624cf895d0 https://doi.org/10.1016/j.ecolind.2017.10.062 |
genre |
Arctic Betula nana Brooks Range Climate change Global warming permafrost |
genre_facet |
Arctic Betula nana Brooks Range Climate change Global warming permafrost |
op_source |
Gałka , M , Swindles , G T , Szal , M , Fulweber , R & Feurdean , A 2018 , ' Response of plant communities to climate change during the late Holocene: Palaeoecological insights from peatlands in the Alaskan Arctic ' , Ecological Indicators , vol. 85 , pp. 525-536 . https://doi.org/10.1016/j.ecolind.2017.10.062 |
op_relation |
https://pure.qub.ac.uk/en/publications/d9f3b2bd-a670-49f7-ba0c-b8624cf895d0 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.ecolind.2017.10.062 |
container_title |
Ecological Indicators |
container_volume |
85 |
container_start_page |
525 |
op_container_end_page |
536 |
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1810292671196954624 |