Holocene dynamics of an inland palsa peatland at Wiyâshâkimî Lake (Nunavik, Canada)
This study examines the Holocene evolution of an inland subarctic permafrost peatland located on the north bank of Wiyâshâkimî Lake (Nunavik, northeastern Canada). The analysis of plant macrofossils allowed us to reconstruct the succession of the trophic conditions of a palsa and a filled thermokars...
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Taylor & Francis
2021
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ftdatacite:10.6084/m9.figshare.14489205.v1 2023-05-15T16:37:40+02:00 Holocene dynamics of an inland palsa peatland at Wiyâshâkimî Lake (Nunavik, Canada) Langlais, Karine Bhiry, Najat Lavoie, Martin 2021 https://dx.doi.org/10.6084/m9.figshare.14489205.v1 https://tandf.figshare.com/articles/figure/Holocene_dynamics_of_an_inland_palsa_peatland_at_Wiy_sh_kim_Lake_Nunavik_Canada_/14489205/1 unknown Taylor & Francis https://dx.doi.org/10.1080/11956860.2021.1907975 https://dx.doi.org/10.6084/m9.figshare.14489205 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Molecular Biology Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology 69999 Biological Sciences not elsewhere classified Developmental Biology Inorganic Chemistry FOS Chemical sciences ImageObject Figure Image graphic 2021 ftdatacite https://doi.org/10.6084/m9.figshare.14489205.v1 https://doi.org/10.1080/11956860.2021.1907975 https://doi.org/10.6084/m9.figshare.14489205 2022-02-08T18:05:53Z This study examines the Holocene evolution of an inland subarctic permafrost peatland located on the north bank of Wiyâshâkimî Lake (Nunavik, northeastern Canada). The analysis of plant macrofossils allowed us to reconstruct the succession of the trophic conditions of a palsa and a filled thermokarst pond. The accumulation of organic matter began at around 6290 cal. y BP. The evolution of the site then followed three stages: a pond (6290–5790 cal. y BP), a minerotrophic peatland (5790–4350 cal. y BP) and an ombrotrophic peatland (from 4350 cal. y BP). The establishment of permafrost caused a palsa to form at around 170 cal. y BP, which corresponds to the coldest period of the Little Ice Age in northeastern Canada. A subsequent degradation of the palsa and the formation of a thermokarst pond were induced by the climate warming that began at the turn of the 20th century. The analysis of plant macrofossils from an adjacent filled thermokarst pond indicated three phases of development over a short 450-year period: subaquatic, minerotrophic, and ombrotrophic phases. When combined with previous studies of filled thermokarst ponds in northern Québec, this result indicates that ponds are rapidly filling in with vegetation and acting as carbon sinks. Still Image Ice palsa permafrost Subarctic Thermokarst Nunavik DataCite Metadata Store (German National Library of Science and Technology) Nunavik Canada |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Molecular Biology Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology 69999 Biological Sciences not elsewhere classified Developmental Biology Inorganic Chemistry FOS Chemical sciences |
spellingShingle |
Molecular Biology Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology 69999 Biological Sciences not elsewhere classified Developmental Biology Inorganic Chemistry FOS Chemical sciences Langlais, Karine Bhiry, Najat Lavoie, Martin Holocene dynamics of an inland palsa peatland at Wiyâshâkimî Lake (Nunavik, Canada) |
topic_facet |
Molecular Biology Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology 69999 Biological Sciences not elsewhere classified Developmental Biology Inorganic Chemistry FOS Chemical sciences |
description |
This study examines the Holocene evolution of an inland subarctic permafrost peatland located on the north bank of Wiyâshâkimî Lake (Nunavik, northeastern Canada). The analysis of plant macrofossils allowed us to reconstruct the succession of the trophic conditions of a palsa and a filled thermokarst pond. The accumulation of organic matter began at around 6290 cal. y BP. The evolution of the site then followed three stages: a pond (6290–5790 cal. y BP), a minerotrophic peatland (5790–4350 cal. y BP) and an ombrotrophic peatland (from 4350 cal. y BP). The establishment of permafrost caused a palsa to form at around 170 cal. y BP, which corresponds to the coldest period of the Little Ice Age in northeastern Canada. A subsequent degradation of the palsa and the formation of a thermokarst pond were induced by the climate warming that began at the turn of the 20th century. The analysis of plant macrofossils from an adjacent filled thermokarst pond indicated three phases of development over a short 450-year period: subaquatic, minerotrophic, and ombrotrophic phases. When combined with previous studies of filled thermokarst ponds in northern Québec, this result indicates that ponds are rapidly filling in with vegetation and acting as carbon sinks. |
format |
Still Image |
author |
Langlais, Karine Bhiry, Najat Lavoie, Martin |
author_facet |
Langlais, Karine Bhiry, Najat Lavoie, Martin |
author_sort |
Langlais, Karine |
title |
Holocene dynamics of an inland palsa peatland at Wiyâshâkimî Lake (Nunavik, Canada) |
title_short |
Holocene dynamics of an inland palsa peatland at Wiyâshâkimî Lake (Nunavik, Canada) |
title_full |
Holocene dynamics of an inland palsa peatland at Wiyâshâkimî Lake (Nunavik, Canada) |
title_fullStr |
Holocene dynamics of an inland palsa peatland at Wiyâshâkimî Lake (Nunavik, Canada) |
title_full_unstemmed |
Holocene dynamics of an inland palsa peatland at Wiyâshâkimî Lake (Nunavik, Canada) |
title_sort |
holocene dynamics of an inland palsa peatland at wiyâshâkimî lake (nunavik, canada) |
publisher |
Taylor & Francis |
publishDate |
2021 |
url |
https://dx.doi.org/10.6084/m9.figshare.14489205.v1 https://tandf.figshare.com/articles/figure/Holocene_dynamics_of_an_inland_palsa_peatland_at_Wiy_sh_kim_Lake_Nunavik_Canada_/14489205/1 |
geographic |
Nunavik Canada |
geographic_facet |
Nunavik Canada |
genre |
Ice palsa permafrost Subarctic Thermokarst Nunavik |
genre_facet |
Ice palsa permafrost Subarctic Thermokarst Nunavik |
op_relation |
https://dx.doi.org/10.1080/11956860.2021.1907975 https://dx.doi.org/10.6084/m9.figshare.14489205 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.14489205.v1 https://doi.org/10.1080/11956860.2021.1907975 https://doi.org/10.6084/m9.figshare.14489205 |
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