A frozen feast: thawing permafrost increases plant-available nitrogen in subarctic peatlands
Many of the world's northern peatlands are underlain by rapidly thawing permafrost. Because plant production in these peatlands is often nitrogen (N)-limited, a release of N stored in permafrost may stimulate net primary production or change species composition if it is plant-available. In this...
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2012
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Online Access: | https://research.vu.nl/en/publications/be90bbfc-a81b-45cd-8798-735df57b527c https://doi.org/10.1111/j.1365-2486.2012.02663.x https://hdl.handle.net/1871.1/be90bbfc-a81b-45cd-8798-735df57b527c |
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ftvuamstcris:oai:research.vu.nl:publications/be90bbfc-a81b-45cd-8798-735df57b527c 2024-09-30T14:41:05+00:00 A frozen feast: thawing permafrost increases plant-available nitrogen in subarctic peatlands Keuper, F. van Bodegom, P.M. Dorrepaal, E. Weedon, J.T. van Hal, J.R. van Logtestijn, R.S.P Aerts, R. 2012 https://research.vu.nl/en/publications/be90bbfc-a81b-45cd-8798-735df57b527c https://doi.org/10.1111/j.1365-2486.2012.02663.x https://hdl.handle.net/1871.1/be90bbfc-a81b-45cd-8798-735df57b527c eng eng https://research.vu.nl/en/publications/be90bbfc-a81b-45cd-8798-735df57b527c info:eu-repo/semantics/restrictedAccess Keuper , F , van Bodegom , P M , Dorrepaal , E , Weedon , J T , van Hal , J R , van Logtestijn , R S P & Aerts , R 2012 , ' A frozen feast: thawing permafrost increases plant-available nitrogen in subarctic peatlands ' , Global Change Biology , vol. 18 , no. 6 , pp. 1998-2007 . https://doi.org/10.1111/j.1365-2486.2012.02663.x article 2012 ftvuamstcris https://doi.org/10.1111/j.1365-2486.2012.02663.x 2024-09-12T00:17:36Z Many of the world's northern peatlands are underlain by rapidly thawing permafrost. Because plant production in these peatlands is often nitrogen (N)-limited, a release of N stored in permafrost may stimulate net primary production or change species composition if it is plant-available. In this study, we aimed to quantify plant-available N in thawing permafrost soils of subarctic peatlands. We compared plant-available N-pools and -fluxes in near-surface permafrost (0-10 cm below the thawfront) to those taken from a current rooting zone layer (5-15 cm depth) across five representative peatlands in subarctic Sweden. A range of complementary methods was used: extractions of inorganic and organic N, inorganic and organic N-release measurements at 0.5 and 11 °C (over 120 days, relevant to different thaw-development scenarios) and a bioassay with Poa alpina test plants. All extraction methods, across all peatlands, consistently showed up to seven times more plant-available N in near-surface permafrost soil compared to the current rooting zone layer. These results were supported by the bioassay experiment, with an eightfold larger plant N-uptake from permafrost soil than from other N-sources such as current rooting zone soil or fresh litter substrates. Moreover, net mineralization rates were much higher in permafrost soils compared to soils from the current rooting zone layer (273 mg N m Article in Journal/Newspaper permafrost Poa alpina Subarctic Vrije Universiteit Amsterdam (VU): Research Portal Global Change Biology 18 6 1998 2007 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
description |
Many of the world's northern peatlands are underlain by rapidly thawing permafrost. Because plant production in these peatlands is often nitrogen (N)-limited, a release of N stored in permafrost may stimulate net primary production or change species composition if it is plant-available. In this study, we aimed to quantify plant-available N in thawing permafrost soils of subarctic peatlands. We compared plant-available N-pools and -fluxes in near-surface permafrost (0-10 cm below the thawfront) to those taken from a current rooting zone layer (5-15 cm depth) across five representative peatlands in subarctic Sweden. A range of complementary methods was used: extractions of inorganic and organic N, inorganic and organic N-release measurements at 0.5 and 11 °C (over 120 days, relevant to different thaw-development scenarios) and a bioassay with Poa alpina test plants. All extraction methods, across all peatlands, consistently showed up to seven times more plant-available N in near-surface permafrost soil compared to the current rooting zone layer. These results were supported by the bioassay experiment, with an eightfold larger plant N-uptake from permafrost soil than from other N-sources such as current rooting zone soil or fresh litter substrates. Moreover, net mineralization rates were much higher in permafrost soils compared to soils from the current rooting zone layer (273 mg N m |
format |
Article in Journal/Newspaper |
author |
Keuper, F. van Bodegom, P.M. Dorrepaal, E. Weedon, J.T. van Hal, J.R. van Logtestijn, R.S.P Aerts, R. |
spellingShingle |
Keuper, F. van Bodegom, P.M. Dorrepaal, E. Weedon, J.T. van Hal, J.R. van Logtestijn, R.S.P Aerts, R. A frozen feast: thawing permafrost increases plant-available nitrogen in subarctic peatlands |
author_facet |
Keuper, F. van Bodegom, P.M. Dorrepaal, E. Weedon, J.T. van Hal, J.R. van Logtestijn, R.S.P Aerts, R. |
author_sort |
Keuper, F. |
title |
A frozen feast: thawing permafrost increases plant-available nitrogen in subarctic peatlands |
title_short |
A frozen feast: thawing permafrost increases plant-available nitrogen in subarctic peatlands |
title_full |
A frozen feast: thawing permafrost increases plant-available nitrogen in subarctic peatlands |
title_fullStr |
A frozen feast: thawing permafrost increases plant-available nitrogen in subarctic peatlands |
title_full_unstemmed |
A frozen feast: thawing permafrost increases plant-available nitrogen in subarctic peatlands |
title_sort |
frozen feast: thawing permafrost increases plant-available nitrogen in subarctic peatlands |
publishDate |
2012 |
url |
https://research.vu.nl/en/publications/be90bbfc-a81b-45cd-8798-735df57b527c https://doi.org/10.1111/j.1365-2486.2012.02663.x https://hdl.handle.net/1871.1/be90bbfc-a81b-45cd-8798-735df57b527c |
genre |
permafrost Poa alpina Subarctic |
genre_facet |
permafrost Poa alpina Subarctic |
op_source |
Keuper , F , van Bodegom , P M , Dorrepaal , E , Weedon , J T , van Hal , J R , van Logtestijn , R S P & Aerts , R 2012 , ' A frozen feast: thawing permafrost increases plant-available nitrogen in subarctic peatlands ' , Global Change Biology , vol. 18 , no. 6 , pp. 1998-2007 . https://doi.org/10.1111/j.1365-2486.2012.02663.x |
op_relation |
https://research.vu.nl/en/publications/be90bbfc-a81b-45cd-8798-735df57b527c |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/j.1365-2486.2012.02663.x |
container_title |
Global Change Biology |
container_volume |
18 |
container_issue |
6 |
container_start_page |
1998 |
op_container_end_page |
2007 |
_version_ |
1811643509981052928 |