Poor fen succession over ombrotrophic peat related to late Holocene increased surface wetness in subarctic Quebec, Canada
Northern peatlands act as archives of environmental change through their sensitivity to water balance fluctuations, while being significant contributors to global greenhouse gas dynamics. Subarctic fens in northeastern Canada are characterized by a dominance of pools and flarks. We aimed to reconstr...
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ftunivquebec:oai:archipel.uqam.ca:11847 2023-07-16T04:01:03+02:00 Poor fen succession over ombrotrophic peat related to late Holocene increased surface wetness in subarctic Quebec, Canada van Bellen, Simon Garneau, Michelle Ali, Adam A. Lamarre, Alexandre Robert, Élisabeth C. Magnan, Gabriel Asnong, Hans Pratte, Steve 2013-10-01 application/pdf http://archipel.uqam.ca/11847/1/van_bellen_et_al_2013_jqs.pdf en eng http://archipel.uqam.ca/11847/ http://dx.doi.org/10.1002/jqs.2670 doi:10.1002/jqs.2670 http://archipel.uqam.ca/11847/1/van_bellen_et_al_2013_jqs.pdf van Bellen, Simon; Garneau, Michelle; Ali, Adam A.; Lamarre, Alexandre; Robert, Élisabeth C.; Magnan, Gabriel; Asnong, Hans et Pratte, Steve (2013). « Poor fen succession over ombrotrophic peat related to late Holocene increased surface wetness in subarctic Quebec, Canada ». Journal of Quaternary Science, 28(8), pp. 748-760. Little Ice Age methane Neoglacial plant macrofossils testate amoeba fen Article de revue scientifique PeerReviewed 2013 ftunivquebec https://doi.org/10.1002/jqs.2670 2023-06-24T23:22:54Z Northern peatlands act as archives of environmental change through their sensitivity to water balance fluctuations, while being significant contributors to global greenhouse gas dynamics. Subarctic fens in northeastern Canada are characterized by a dominance of pools and flarks. We aimed to reconstruct the late-Holocene hydrological conditions of these fens to establish the timing of the initiation of pool and flark formation and possible linkages with climate. Testate amoebae and plant macrofossils from five cores, sampled in three fens, were analyzed to infer water tables with chronologies based on 14C and 210Pb dating. All sites showed presence of relatively dry, ombrotrophic conditions with abundant Picea from 5000 cal a BP, followed by a first shift to wet, poor fen conditions with pool and flark development around 3000 cal a BP and a subsequent wet shift after ~800 cal a BP. These trends coincide with previously observed Neoglacial and Little Ice Age cooler and wetter conditions and therefore climate may well have been a dominant factor in the initiation and development of pools and flarks over the late-Holocene. The effect of anticipated climate change on subarctic peatlands remains unclear, although wetter conditions might enhance pool expansion to the detriment of terrestrial components. Text Subarctic UQAM - Université du Québec à Montréal: archipel Canada Journal of Quaternary Science 28 8 748 760 |
institution |
Open Polar |
collection |
UQAM - Université du Québec à Montréal: archipel |
op_collection_id |
ftunivquebec |
language |
English |
topic |
Little Ice Age methane Neoglacial plant macrofossils testate amoeba fen |
spellingShingle |
Little Ice Age methane Neoglacial plant macrofossils testate amoeba fen van Bellen, Simon Garneau, Michelle Ali, Adam A. Lamarre, Alexandre Robert, Élisabeth C. Magnan, Gabriel Asnong, Hans Pratte, Steve Poor fen succession over ombrotrophic peat related to late Holocene increased surface wetness in subarctic Quebec, Canada |
topic_facet |
Little Ice Age methane Neoglacial plant macrofossils testate amoeba fen |
description |
Northern peatlands act as archives of environmental change through their sensitivity to water balance fluctuations, while being significant contributors to global greenhouse gas dynamics. Subarctic fens in northeastern Canada are characterized by a dominance of pools and flarks. We aimed to reconstruct the late-Holocene hydrological conditions of these fens to establish the timing of the initiation of pool and flark formation and possible linkages with climate. Testate amoebae and plant macrofossils from five cores, sampled in three fens, were analyzed to infer water tables with chronologies based on 14C and 210Pb dating. All sites showed presence of relatively dry, ombrotrophic conditions with abundant Picea from 5000 cal a BP, followed by a first shift to wet, poor fen conditions with pool and flark development around 3000 cal a BP and a subsequent wet shift after ~800 cal a BP. These trends coincide with previously observed Neoglacial and Little Ice Age cooler and wetter conditions and therefore climate may well have been a dominant factor in the initiation and development of pools and flarks over the late-Holocene. The effect of anticipated climate change on subarctic peatlands remains unclear, although wetter conditions might enhance pool expansion to the detriment of terrestrial components. |
format |
Text |
author |
van Bellen, Simon Garneau, Michelle Ali, Adam A. Lamarre, Alexandre Robert, Élisabeth C. Magnan, Gabriel Asnong, Hans Pratte, Steve |
author_facet |
van Bellen, Simon Garneau, Michelle Ali, Adam A. Lamarre, Alexandre Robert, Élisabeth C. Magnan, Gabriel Asnong, Hans Pratte, Steve |
author_sort |
van Bellen, Simon |
title |
Poor fen succession over ombrotrophic peat related to late Holocene increased surface wetness in subarctic Quebec, Canada |
title_short |
Poor fen succession over ombrotrophic peat related to late Holocene increased surface wetness in subarctic Quebec, Canada |
title_full |
Poor fen succession over ombrotrophic peat related to late Holocene increased surface wetness in subarctic Quebec, Canada |
title_fullStr |
Poor fen succession over ombrotrophic peat related to late Holocene increased surface wetness in subarctic Quebec, Canada |
title_full_unstemmed |
Poor fen succession over ombrotrophic peat related to late Holocene increased surface wetness in subarctic Quebec, Canada |
title_sort |
poor fen succession over ombrotrophic peat related to late holocene increased surface wetness in subarctic quebec, canada |
publishDate |
2013 |
url |
http://archipel.uqam.ca/11847/1/van_bellen_et_al_2013_jqs.pdf |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
http://archipel.uqam.ca/11847/ http://dx.doi.org/10.1002/jqs.2670 doi:10.1002/jqs.2670 http://archipel.uqam.ca/11847/1/van_bellen_et_al_2013_jqs.pdf van Bellen, Simon; Garneau, Michelle; Ali, Adam A.; Lamarre, Alexandre; Robert, Élisabeth C.; Magnan, Gabriel; Asnong, Hans et Pratte, Steve (2013). « Poor fen succession over ombrotrophic peat related to late Holocene increased surface wetness in subarctic Quebec, Canada ». Journal of Quaternary Science, 28(8), pp. 748-760. |
op_doi |
https://doi.org/10.1002/jqs.2670 |
container_title |
Journal of Quaternary Science |
container_volume |
28 |
container_issue |
8 |
container_start_page |
748 |
op_container_end_page |
760 |
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1771550484960641024 |