Recent hummock establishment in the margin of a subarctic fen, Finnish Lapland
Northern fens, that host unique biota and form a remarkable carbon stock, are sensitive to changes in the moisture balance and, therefore, may be strongly affected by climatic fluctuations. However, long-term monitoring and palaeoecological studies of fens are relatively rare and, as a result, their...
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Wiley Blackwell
2024
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/573379 2024-04-28T08:39:58+00:00 Recent hummock establishment in the margin of a subarctic fen, Finnish Lapland Kuuri-Riutta, Olivia Pilkama, Elmiina Salminen-Paatero, Susanna Vögeli, Camille Mitchell, Edward A. D. Lohila, Annalea Tuittila, Eeva-Stiina Väliranta, Minna Ecosystems and Environment Research Programme Department of Chemistry Institute for Atmospheric and Earth System Research (INAR) Helsinki Institute of Sustainability Science (HELSUS) Environmental Change Research Unit (ECRU) 2024-03-19T07:10:03Z 14 application/pdf http://hdl.handle.net/10138/573379 eng eng Wiley Blackwell 10.1111/bor.12651 We thank Sanna Piilo and Teemu Juselius-Rajamaki for assistance in age-depth modelling, Henni Ylanne, Hui Zhang, Janna Barel and Juho Kettunen for technical assistance, and Samuel Haverinen and Nina Kumpulainen for collection of water table data. We thank the Academy of Finland (project codes 330840, 338631, 296519), the Atmosphere and Climate Competence Center and Societas Pro Fauna et Flora Fennica for funding this project. We have no conflicts of interest to announce. Kuuri-Riutta , O , Pilkama , E , Salminen-Paatero , S , Vögeli , C , Mitchell , E A D , Lohila , A , Tuittila , E-S & Väliranta , M 2024 , ' Recent hummock establishment in the margin of a subarctic fen, Finnish Lapland ' , Boreas , vol. 53 , no. 2 , pp. 282-295 . https://doi.org/10.1111/bor.12651 ORCID: /0000-0001-5667-8329/work/156152796 ORCID: /0000-0003-0129-7240/work/156152938 http://hdl.handle.net/10138/573379 582ab59a-88ca-4a44-bb48-72c4196ae82f 001155430300001 cc_by info:eu-repo/semantics/openAccess openAccess Testate amebas Climate-change Carbon accumulation Plant macrofossils Methane emissions Peatland carbon Northern Boreal Vegetation Finland 1171 Geosciences 1172 Environmental sciences 1181 Ecology evolutionary biology Article publishedVersion 2024 ftunivhelsihelda 2024-04-09T23:59:54Z Northern fens, that host unique biota and form a remarkable carbon stock, are sensitive to changes in the moisture balance and, therefore, may be strongly affected by climatic fluctuations. However, long-term monitoring and palaeoecological studies of fens are relatively rare and, as a result, their responses to past and current climatic fluctuations are poorly known. In this study, we examined the recent vegetation change as well as changes in testate amoeba communities in the mire margin of a subarctic fen in Finnish Lapland with four peat profiles. Testate amoebae were used as indicators of past fluctuations in water table depth. The vegetation showed a drastic shift from sedge-dominated fen to Sphagnum-dominated communities during the late 20th and the early 21st centuries. This shift was accompanied by a turnover in the testate amoeba community. Testate amoeba-based water table reconstructions indicated recent drying. This may be due to the lowering of the water table either from accelerated Sphagnum increment or enhanced evaporation. The observed hummock establishment concurs with the documented hemisphere-wide expansion trend of hummock communities in fens. This change may strengthen the carbon sink and storage capacity of these peatlands, which could be viewed as a welcome negative feedback process to the ongoing climate warming. However, the change also poses a threat to biodiversity since fens are not only species-rich habitats but are also endangered ecosystems. Peer reviewed Article in Journal/Newspaper Subarctic Lapland HELDA – University of Helsinki Open Repository |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
Testate amebas Climate-change Carbon accumulation Plant macrofossils Methane emissions Peatland carbon Northern Boreal Vegetation Finland 1171 Geosciences 1172 Environmental sciences 1181 Ecology evolutionary biology |
spellingShingle |
Testate amebas Climate-change Carbon accumulation Plant macrofossils Methane emissions Peatland carbon Northern Boreal Vegetation Finland 1171 Geosciences 1172 Environmental sciences 1181 Ecology evolutionary biology Kuuri-Riutta, Olivia Pilkama, Elmiina Salminen-Paatero, Susanna Vögeli, Camille Mitchell, Edward A. D. Lohila, Annalea Tuittila, Eeva-Stiina Väliranta, Minna Recent hummock establishment in the margin of a subarctic fen, Finnish Lapland |
topic_facet |
Testate amebas Climate-change Carbon accumulation Plant macrofossils Methane emissions Peatland carbon Northern Boreal Vegetation Finland 1171 Geosciences 1172 Environmental sciences 1181 Ecology evolutionary biology |
description |
Northern fens, that host unique biota and form a remarkable carbon stock, are sensitive to changes in the moisture balance and, therefore, may be strongly affected by climatic fluctuations. However, long-term monitoring and palaeoecological studies of fens are relatively rare and, as a result, their responses to past and current climatic fluctuations are poorly known. In this study, we examined the recent vegetation change as well as changes in testate amoeba communities in the mire margin of a subarctic fen in Finnish Lapland with four peat profiles. Testate amoebae were used as indicators of past fluctuations in water table depth. The vegetation showed a drastic shift from sedge-dominated fen to Sphagnum-dominated communities during the late 20th and the early 21st centuries. This shift was accompanied by a turnover in the testate amoeba community. Testate amoeba-based water table reconstructions indicated recent drying. This may be due to the lowering of the water table either from accelerated Sphagnum increment or enhanced evaporation. The observed hummock establishment concurs with the documented hemisphere-wide expansion trend of hummock communities in fens. This change may strengthen the carbon sink and storage capacity of these peatlands, which could be viewed as a welcome negative feedback process to the ongoing climate warming. However, the change also poses a threat to biodiversity since fens are not only species-rich habitats but are also endangered ecosystems. Peer reviewed |
author2 |
Ecosystems and Environment Research Programme Department of Chemistry Institute for Atmospheric and Earth System Research (INAR) Helsinki Institute of Sustainability Science (HELSUS) Environmental Change Research Unit (ECRU) |
format |
Article in Journal/Newspaper |
author |
Kuuri-Riutta, Olivia Pilkama, Elmiina Salminen-Paatero, Susanna Vögeli, Camille Mitchell, Edward A. D. Lohila, Annalea Tuittila, Eeva-Stiina Väliranta, Minna |
author_facet |
Kuuri-Riutta, Olivia Pilkama, Elmiina Salminen-Paatero, Susanna Vögeli, Camille Mitchell, Edward A. D. Lohila, Annalea Tuittila, Eeva-Stiina Väliranta, Minna |
author_sort |
Kuuri-Riutta, Olivia |
title |
Recent hummock establishment in the margin of a subarctic fen, Finnish Lapland |
title_short |
Recent hummock establishment in the margin of a subarctic fen, Finnish Lapland |
title_full |
Recent hummock establishment in the margin of a subarctic fen, Finnish Lapland |
title_fullStr |
Recent hummock establishment in the margin of a subarctic fen, Finnish Lapland |
title_full_unstemmed |
Recent hummock establishment in the margin of a subarctic fen, Finnish Lapland |
title_sort |
recent hummock establishment in the margin of a subarctic fen, finnish lapland |
publisher |
Wiley Blackwell |
publishDate |
2024 |
url |
http://hdl.handle.net/10138/573379 |
genre |
Subarctic Lapland |
genre_facet |
Subarctic Lapland |
op_relation |
10.1111/bor.12651 We thank Sanna Piilo and Teemu Juselius-Rajamaki for assistance in age-depth modelling, Henni Ylanne, Hui Zhang, Janna Barel and Juho Kettunen for technical assistance, and Samuel Haverinen and Nina Kumpulainen for collection of water table data. We thank the Academy of Finland (project codes 330840, 338631, 296519), the Atmosphere and Climate Competence Center and Societas Pro Fauna et Flora Fennica for funding this project. We have no conflicts of interest to announce. Kuuri-Riutta , O , Pilkama , E , Salminen-Paatero , S , Vögeli , C , Mitchell , E A D , Lohila , A , Tuittila , E-S & Väliranta , M 2024 , ' Recent hummock establishment in the margin of a subarctic fen, Finnish Lapland ' , Boreas , vol. 53 , no. 2 , pp. 282-295 . https://doi.org/10.1111/bor.12651 ORCID: /0000-0001-5667-8329/work/156152796 ORCID: /0000-0003-0129-7240/work/156152938 http://hdl.handle.net/10138/573379 582ab59a-88ca-4a44-bb48-72c4196ae82f 001155430300001 |
op_rights |
cc_by info:eu-repo/semantics/openAccess openAccess |
_version_ |
1797570776119902208 |