Mineral element recycling in topsoil following permafrost degradation and a vegetation shift in sub-Arctic tundra
Climate change affects the Arctic and sub-Arctic regions by exposing previously frozen permafrost to thaw, unlocking soil nutrients, changing hydrological processes, and boosting plant growth. As a result, sub-Arctic tundra is subject to a shrub expansion, called “shrubificationâ€, at the expense...
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Online Access: | http://hdl.handle.net/2078.1/260550 https://doi.org/10.1016/j.geoderma.2022.115915 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:260550 2024-05-12T07:58:27+00:00 Mineral element recycling in topsoil following permafrost degradation and a vegetation shift in sub-Arctic tundra Villani, Maëlle Mauclet, Elisabeth Agnan, Yannick Druel, Arsène Jasinski, Briana Taylor, Meghan Schuur, Edward A.G. Opfergelt, Sophie UCL - SST/ELI/ELIE - Environmental Sciences 2022 http://hdl.handle.net/2078.1/260550 https://doi.org/10.1016/j.geoderma.2022.115915 eng eng Elsevier BV info:eu-repo/grantAgreement/European Research Council (ERC)/European Union’s Horizon 2020 research and innovation programme/ boreal:260550 http://hdl.handle.net/2078.1/260550 doi:10.1016/j.geoderma.2022.115915 urn:ISSN:0016-7061 info:eu-repo/semantics/openAccess Geoderma, Vol. 421, p. 115915 (2022) sub-Arctic tundra permafrost degradation shrubification topsoil mineral elements vegetation change info:eu-repo/semantics/article 2022 ftunistlouisbrus https://doi.org/10.1016/j.geoderma.2022.115915 2024-04-18T17:13:21Z Climate change affects the Arctic and sub-Arctic regions by exposing previously frozen permafrost to thaw, unlocking soil nutrients, changing hydrological processes, and boosting plant growth. As a result, sub-Arctic tundra is subject to a shrub expansion, called “shrubificationâ€, at the expense of sedge species. Depending on the intrinsic foliar properties of these plant species, changes in foliar mineral element fluxes with shrubification in the context of permafrost degradation may influence topsoil mineral element composition. Despite the potential implications of changes in topsoil mineral element concentrations for the fate of organic carbon, this remains poorly quantified. Here, we investigate vegetation foliar and topsoil mineral element composition (Si, K, Ca, P, Mn, Zn, Cu, Mo, V) across a natural gradient of permafrost degradation at a typical sub-Arctic tundra at Eight Mile Lake (Alaska, USA). Results show that foliar mineral element concentrations are higher (up to 9 times; Si, K, Mo for all species, and for some species Zn) or lower (up to 2 times; Ca, P, Mn, Cu, V for all species, and for some species Zn) in sedge than in shrub species. As a result, a vegetation shift over ~40 years has resulted in lower topsoil concentrations in Si, K, Zn, and Mo (respectively of 52, 24, 20, and 51%) in highly degraded permafrost sites compared to poorly degraded permafrost sites due to lower foliar fluxes of these elements. For other elements (Ca, P, Mn, Cu, and V), the vegetation shift has not induced a marked change in topsoil concentrations at this current stage of permafrost degradation. A modeled amplified shrubification associated with a further permafrost degradation is expected to increase foliar Ca, P, Mn, Cu, and V fluxes, which will likely change these element concentrations in topsoil. These data can serve as a first estimate to assess the influence of other shifts in vegetation in Arctic and sub-Arctic tundra such as sedge expansion under wetter soil conditions. Article in Journal/Newspaper Arctic Climate change permafrost Tundra Alaska DIAL@USL-B (Université Saint-Louis, Bruxelles) Arctic Geoderma 421 115915 |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
topic |
sub-Arctic tundra permafrost degradation shrubification topsoil mineral elements vegetation change |
spellingShingle |
sub-Arctic tundra permafrost degradation shrubification topsoil mineral elements vegetation change Villani, Maëlle Mauclet, Elisabeth Agnan, Yannick Druel, Arsène Jasinski, Briana Taylor, Meghan Schuur, Edward A.G. Opfergelt, Sophie Mineral element recycling in topsoil following permafrost degradation and a vegetation shift in sub-Arctic tundra |
topic_facet |
sub-Arctic tundra permafrost degradation shrubification topsoil mineral elements vegetation change |
description |
Climate change affects the Arctic and sub-Arctic regions by exposing previously frozen permafrost to thaw, unlocking soil nutrients, changing hydrological processes, and boosting plant growth. As a result, sub-Arctic tundra is subject to a shrub expansion, called “shrubificationâ€, at the expense of sedge species. Depending on the intrinsic foliar properties of these plant species, changes in foliar mineral element fluxes with shrubification in the context of permafrost degradation may influence topsoil mineral element composition. Despite the potential implications of changes in topsoil mineral element concentrations for the fate of organic carbon, this remains poorly quantified. Here, we investigate vegetation foliar and topsoil mineral element composition (Si, K, Ca, P, Mn, Zn, Cu, Mo, V) across a natural gradient of permafrost degradation at a typical sub-Arctic tundra at Eight Mile Lake (Alaska, USA). Results show that foliar mineral element concentrations are higher (up to 9 times; Si, K, Mo for all species, and for some species Zn) or lower (up to 2 times; Ca, P, Mn, Cu, V for all species, and for some species Zn) in sedge than in shrub species. As a result, a vegetation shift over ~40 years has resulted in lower topsoil concentrations in Si, K, Zn, and Mo (respectively of 52, 24, 20, and 51%) in highly degraded permafrost sites compared to poorly degraded permafrost sites due to lower foliar fluxes of these elements. For other elements (Ca, P, Mn, Cu, and V), the vegetation shift has not induced a marked change in topsoil concentrations at this current stage of permafrost degradation. A modeled amplified shrubification associated with a further permafrost degradation is expected to increase foliar Ca, P, Mn, Cu, and V fluxes, which will likely change these element concentrations in topsoil. These data can serve as a first estimate to assess the influence of other shifts in vegetation in Arctic and sub-Arctic tundra such as sedge expansion under wetter soil conditions. |
author2 |
UCL - SST/ELI/ELIE - Environmental Sciences |
format |
Article in Journal/Newspaper |
author |
Villani, Maëlle Mauclet, Elisabeth Agnan, Yannick Druel, Arsène Jasinski, Briana Taylor, Meghan Schuur, Edward A.G. Opfergelt, Sophie |
author_facet |
Villani, Maëlle Mauclet, Elisabeth Agnan, Yannick Druel, Arsène Jasinski, Briana Taylor, Meghan Schuur, Edward A.G. Opfergelt, Sophie |
author_sort |
Villani, Maëlle |
title |
Mineral element recycling in topsoil following permafrost degradation and a vegetation shift in sub-Arctic tundra |
title_short |
Mineral element recycling in topsoil following permafrost degradation and a vegetation shift in sub-Arctic tundra |
title_full |
Mineral element recycling in topsoil following permafrost degradation and a vegetation shift in sub-Arctic tundra |
title_fullStr |
Mineral element recycling in topsoil following permafrost degradation and a vegetation shift in sub-Arctic tundra |
title_full_unstemmed |
Mineral element recycling in topsoil following permafrost degradation and a vegetation shift in sub-Arctic tundra |
title_sort |
mineral element recycling in topsoil following permafrost degradation and a vegetation shift in sub-arctic tundra |
publisher |
Elsevier BV |
publishDate |
2022 |
url |
http://hdl.handle.net/2078.1/260550 https://doi.org/10.1016/j.geoderma.2022.115915 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change permafrost Tundra Alaska |
genre_facet |
Arctic Climate change permafrost Tundra Alaska |
op_source |
Geoderma, Vol. 421, p. 115915 (2022) |
op_relation |
info:eu-repo/grantAgreement/European Research Council (ERC)/European Union’s Horizon 2020 research and innovation programme/ boreal:260550 http://hdl.handle.net/2078.1/260550 doi:10.1016/j.geoderma.2022.115915 urn:ISSN:0016-7061 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.geoderma.2022.115915 |
container_title |
Geoderma |
container_volume |
421 |
container_start_page |
115915 |
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