Meshes in mesocosms control solute and biota exchange in soils:a step towards disentangling (a)biotic impacts on the fate of thawing permafrost
Environmental changes feedback to climate through their impact on soil functions such as carbon (C) and nutrient sequestration. Abiotic conditions and the interactions between above- and belowground biota drive soil responses to environmental change but these (a)biotic interactions are challenging t...
Published in: | Applied Soil Ecology |
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2020
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Online Access: | https://research.ulapland.fi/fi/publications/e41efcb5-fbf8-4708-96a9-4bb418ce0fda https://doi.org/10.1016/j.apsoil.2020.103537 https://lacris.ulapland.fi/ws/files/36305230/V_is_nen_et_al._2020_Applied_Soil_Ecology.pdf http://www.scopus.com/inward/record.url?scp=85078663670&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85078663670&partnerID=8YFLogxK |
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ftulaplandcdispu:oai:lacris.ulapland.fi:publications/e41efcb5-fbf8-4708-96a9-4bb418ce0fda 2024-02-04T10:03:46+01:00 Meshes in mesocosms control solute and biota exchange in soils:a step towards disentangling (a)biotic impacts on the fate of thawing permafrost Väisänen, Maria Krab, Eveline J. Monteux, Sylvain Teuber, Laurenz Gavazov, Konstantin Weedon, James Keuper, Frida Dorrepaal, Ellen 2020-07 application/pdf https://research.ulapland.fi/fi/publications/e41efcb5-fbf8-4708-96a9-4bb418ce0fda https://doi.org/10.1016/j.apsoil.2020.103537 https://lacris.ulapland.fi/ws/files/36305230/V_is_nen_et_al._2020_Applied_Soil_Ecology.pdf http://www.scopus.com/inward/record.url?scp=85078663670&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85078663670&partnerID=8YFLogxK eng eng https://research.ulapland.fi/fi/publications/e41efcb5-fbf8-4708-96a9-4bb418ce0fda info:eu-repo/semantics/openAccess Väisänen , M , Krab , E J , Monteux , S , Teuber , L , Gavazov , K , Weedon , J , Keuper , F & Dorrepaal , E 2020 , ' Meshes in mesocosms control solute and biota exchange in soils : a step towards disentangling (a)biotic impacts on the fate of thawing permafrost ' , Applied Soil Ecology , vol. 151 , 103537 . https://doi.org/10.1016/j.apsoil.2020.103537 faunal inoculation field incubation lateral soil connection nitrogen bacterial community root /dk/atira/pure/person/fieldofscience2010/1/18/1 name=Ecology evolutionary biology article 2020 ftulaplandcdispu https://doi.org/10.1016/j.apsoil.2020.103537 2024-01-11T00:03:35Z Environmental changes feedback to climate through their impact on soil functions such as carbon (C) and nutrient sequestration. Abiotic conditions and the interactions between above- and belowground biota drive soil responses to environmental change but these (a)biotic interactions are challenging to study. Nonetheless, better understanding of these interactions would improve predictions of future soil functioning and the soil-climate feedback and, in this context, permafrost soils are of particular interest due to their vast soil C-stores. We need new tools to isolate abiotic (microclimate, chemistry) and biotic (roots, fauna, microorganisms) components and to identify their respective roles in soil processes. We developed a new experimental setup, in which we mimic thermokarst (permafrost thaw-induced soil subsidence) by fitting thawed permafrost and vegetated active layer sods side by side into mesocosms deployed in a subarctic tundra over two growing seasons. In each mesocosm, the two sods were separated from each other by barriers with different mesh sizes to allow varying degrees of physical connection and, consequently, (a)biotic exchange between active layer and permafrost. We demonstrate that our mesh-approach succeeded in controlling 1) lateral exchange of solutes between the two soil types, 2) colonization of permafrost by microbes but not by soil fauna, and 3) ingrowth of roots into permafrost. In particular, experimental thermokarst induced a ~ 60% decline in permafrost nitrogen (N) content, a shift in soil bacteria and a rapid buildup of root biomass (+ 33.2 g roots m-2 soil). This indicates that cascading plant-soil-microbe linkages are at the heart of biogeochemical cycling in thermokarst events. We propose that this novel setup can be used to explore the effects of (a)biotic ecosystem components on focal biogeochemical processes in permafrost soils and beyond. Article in Journal/Newspaper permafrost Subarctic Thermokarst Tundra LaCRIS - University of Lapland Current Research System Applied Soil Ecology 151 103537 |
institution |
Open Polar |
collection |
LaCRIS - University of Lapland Current Research System |
op_collection_id |
ftulaplandcdispu |
language |
English |
topic |
faunal inoculation field incubation lateral soil connection nitrogen bacterial community root /dk/atira/pure/person/fieldofscience2010/1/18/1 name=Ecology evolutionary biology |
spellingShingle |
faunal inoculation field incubation lateral soil connection nitrogen bacterial community root /dk/atira/pure/person/fieldofscience2010/1/18/1 name=Ecology evolutionary biology Väisänen, Maria Krab, Eveline J. Monteux, Sylvain Teuber, Laurenz Gavazov, Konstantin Weedon, James Keuper, Frida Dorrepaal, Ellen Meshes in mesocosms control solute and biota exchange in soils:a step towards disentangling (a)biotic impacts on the fate of thawing permafrost |
topic_facet |
faunal inoculation field incubation lateral soil connection nitrogen bacterial community root /dk/atira/pure/person/fieldofscience2010/1/18/1 name=Ecology evolutionary biology |
description |
Environmental changes feedback to climate through their impact on soil functions such as carbon (C) and nutrient sequestration. Abiotic conditions and the interactions between above- and belowground biota drive soil responses to environmental change but these (a)biotic interactions are challenging to study. Nonetheless, better understanding of these interactions would improve predictions of future soil functioning and the soil-climate feedback and, in this context, permafrost soils are of particular interest due to their vast soil C-stores. We need new tools to isolate abiotic (microclimate, chemistry) and biotic (roots, fauna, microorganisms) components and to identify their respective roles in soil processes. We developed a new experimental setup, in which we mimic thermokarst (permafrost thaw-induced soil subsidence) by fitting thawed permafrost and vegetated active layer sods side by side into mesocosms deployed in a subarctic tundra over two growing seasons. In each mesocosm, the two sods were separated from each other by barriers with different mesh sizes to allow varying degrees of physical connection and, consequently, (a)biotic exchange between active layer and permafrost. We demonstrate that our mesh-approach succeeded in controlling 1) lateral exchange of solutes between the two soil types, 2) colonization of permafrost by microbes but not by soil fauna, and 3) ingrowth of roots into permafrost. In particular, experimental thermokarst induced a ~ 60% decline in permafrost nitrogen (N) content, a shift in soil bacteria and a rapid buildup of root biomass (+ 33.2 g roots m-2 soil). This indicates that cascading plant-soil-microbe linkages are at the heart of biogeochemical cycling in thermokarst events. We propose that this novel setup can be used to explore the effects of (a)biotic ecosystem components on focal biogeochemical processes in permafrost soils and beyond. |
format |
Article in Journal/Newspaper |
author |
Väisänen, Maria Krab, Eveline J. Monteux, Sylvain Teuber, Laurenz Gavazov, Konstantin Weedon, James Keuper, Frida Dorrepaal, Ellen |
author_facet |
Väisänen, Maria Krab, Eveline J. Monteux, Sylvain Teuber, Laurenz Gavazov, Konstantin Weedon, James Keuper, Frida Dorrepaal, Ellen |
author_sort |
Väisänen, Maria |
title |
Meshes in mesocosms control solute and biota exchange in soils:a step towards disentangling (a)biotic impacts on the fate of thawing permafrost |
title_short |
Meshes in mesocosms control solute and biota exchange in soils:a step towards disentangling (a)biotic impacts on the fate of thawing permafrost |
title_full |
Meshes in mesocosms control solute and biota exchange in soils:a step towards disentangling (a)biotic impacts on the fate of thawing permafrost |
title_fullStr |
Meshes in mesocosms control solute and biota exchange in soils:a step towards disentangling (a)biotic impacts on the fate of thawing permafrost |
title_full_unstemmed |
Meshes in mesocosms control solute and biota exchange in soils:a step towards disentangling (a)biotic impacts on the fate of thawing permafrost |
title_sort |
meshes in mesocosms control solute and biota exchange in soils:a step towards disentangling (a)biotic impacts on the fate of thawing permafrost |
publishDate |
2020 |
url |
https://research.ulapland.fi/fi/publications/e41efcb5-fbf8-4708-96a9-4bb418ce0fda https://doi.org/10.1016/j.apsoil.2020.103537 https://lacris.ulapland.fi/ws/files/36305230/V_is_nen_et_al._2020_Applied_Soil_Ecology.pdf http://www.scopus.com/inward/record.url?scp=85078663670&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85078663670&partnerID=8YFLogxK |
genre |
permafrost Subarctic Thermokarst Tundra |
genre_facet |
permafrost Subarctic Thermokarst Tundra |
op_source |
Väisänen , M , Krab , E J , Monteux , S , Teuber , L , Gavazov , K , Weedon , J , Keuper , F & Dorrepaal , E 2020 , ' Meshes in mesocosms control solute and biota exchange in soils : a step towards disentangling (a)biotic impacts on the fate of thawing permafrost ' , Applied Soil Ecology , vol. 151 , 103537 . https://doi.org/10.1016/j.apsoil.2020.103537 |
op_relation |
https://research.ulapland.fi/fi/publications/e41efcb5-fbf8-4708-96a9-4bb418ce0fda |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.apsoil.2020.103537 |
container_title |
Applied Soil Ecology |
container_volume |
151 |
container_start_page |
103537 |
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1789971456710410240 |