Plant-microbial linkages underpin carbon sequestration in contrasting mountain tundra vegetation types
Tundra ecosystems hold large stocks of soil organic matter (SOM), likely due to low temperatures limiting rates of microbial SOM decomposition more than those of SOM accumulation from plant primary productivity and microbial necromass inputs. Here we test the hypotheses that distinct tundra vegetati...
Published in: | Soil Biology and Biochemistry |
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Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2022
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Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-190965 https://doi.org/10.1016/j.soilbio.2021.108530 |
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ftumeauniv:oai:DiVA.org:umu-190965 |
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Open Polar |
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Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
Above- and belowground interactions C:N stoichiometry Carbon use efficiency Elevation gradient Microbial physiology Primary productivity Ecology Ekologi Soil Science Markvetenskap |
spellingShingle |
Above- and belowground interactions C:N stoichiometry Carbon use efficiency Elevation gradient Microbial physiology Primary productivity Ecology Ekologi Soil Science Markvetenskap Gavazov, Konstantin Canarini, Alberto Jassey, Vincent E.J. Mills, Robert Richter, Andreas Sundqvist, Maja K. Väisänen, Maria Walker, Tom W.N. Wardle, David A. Dorrepaal, Ellen Plant-microbial linkages underpin carbon sequestration in contrasting mountain tundra vegetation types |
topic_facet |
Above- and belowground interactions C:N stoichiometry Carbon use efficiency Elevation gradient Microbial physiology Primary productivity Ecology Ekologi Soil Science Markvetenskap |
description |
Tundra ecosystems hold large stocks of soil organic matter (SOM), likely due to low temperatures limiting rates of microbial SOM decomposition more than those of SOM accumulation from plant primary productivity and microbial necromass inputs. Here we test the hypotheses that distinct tundra vegetation types and their carbon supply to characteristic rhizosphere microbes determine SOM cycling independent of temperature. In the subarctic Scandes, we used a three-way factorial design with paired heath and meadow vegetation at each of two elevations, and with each combination of vegetation type and elevation subjected during one growing season to either ambient light (i.e., ambient plant productivity), or 95% shading (i.e., reduced plant productivity). We assessed potential above- and belowground ecosystem linkages by uni- and multivariate analyses of variance, and structural equation modelling. We observed direct coupling between tundra vegetation type and microbial community composition and function, which underpinned the ecosystem's potential for SOM storage. Greater primary productivity at low elevation and ambient light supported higher microbial biomass and nitrogen immobilisation, with lower microbial mass-specific enzymatic activity and SOM humification. Congruently, larger SOM at lower elevation and in heath sustained fungal-dominated microbial communities, which were less substrate-limited, and invested less into enzymatic SOM mineralisation, owing to a greater carbon-use efficiency (CUE). Our results highlight the importance of tundra plant community characteristics (i.e., productivity and vegetation type), via their effects on soil microbial community size, structure and physiology, as essential drivers of SOM turnover. The here documented concerted patterns in above- and belowground ecosystem functioning is strongly supportive of using plant community characteristics as surrogates for assessing tundra carbon storage potential and its evolution under climate and vegetation changes. |
format |
Article in Journal/Newspaper |
author |
Gavazov, Konstantin Canarini, Alberto Jassey, Vincent E.J. Mills, Robert Richter, Andreas Sundqvist, Maja K. Väisänen, Maria Walker, Tom W.N. Wardle, David A. Dorrepaal, Ellen |
author_facet |
Gavazov, Konstantin Canarini, Alberto Jassey, Vincent E.J. Mills, Robert Richter, Andreas Sundqvist, Maja K. Väisänen, Maria Walker, Tom W.N. Wardle, David A. Dorrepaal, Ellen |
author_sort |
Gavazov, Konstantin |
title |
Plant-microbial linkages underpin carbon sequestration in contrasting mountain tundra vegetation types |
title_short |
Plant-microbial linkages underpin carbon sequestration in contrasting mountain tundra vegetation types |
title_full |
Plant-microbial linkages underpin carbon sequestration in contrasting mountain tundra vegetation types |
title_fullStr |
Plant-microbial linkages underpin carbon sequestration in contrasting mountain tundra vegetation types |
title_full_unstemmed |
Plant-microbial linkages underpin carbon sequestration in contrasting mountain tundra vegetation types |
title_sort |
plant-microbial linkages underpin carbon sequestration in contrasting mountain tundra vegetation types |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2022 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-190965 https://doi.org/10.1016/j.soilbio.2021.108530 |
genre |
Subarctic Tundra |
genre_facet |
Subarctic Tundra |
op_relation |
Soil Biology and Biochemistry, 0038-0717, 2022, 165, orcid:0000-0002-0523-2471 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-190965 doi:10.1016/j.soilbio.2021.108530 ISI:000776074700007 Scopus 2-s2.0-85121879013 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.soilbio.2021.108530 |
container_title |
Soil Biology and Biochemistry |
container_volume |
165 |
container_start_page |
108530 |
_version_ |
1779320688642883584 |
spelling |
ftumeauniv:oai:DiVA.org:umu-190965 2023-10-09T21:56:10+02:00 Plant-microbial linkages underpin carbon sequestration in contrasting mountain tundra vegetation types Gavazov, Konstantin Canarini, Alberto Jassey, Vincent E.J. Mills, Robert Richter, Andreas Sundqvist, Maja K. Väisänen, Maria Walker, Tom W.N. Wardle, David A. Dorrepaal, Ellen 2022 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-190965 https://doi.org/10.1016/j.soilbio.2021.108530 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap Umeå universitet, Arktiskt centrum vid Umeå universitet (Arcum) Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Lausanne, Switzerland Centre for Microbiology and Environmental Systems Science, Division of Terrestrial Ecosystem Research, University of Vienna, Vienna, Austria ECOLAB, Laboratoire D'Ecologie Fonctionnelle et Environnement, Université de Toulouse, CNRS, Toulouse, France Department of Environment and Geography, University of York, York, United Kingdom Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden Ecology and Genetics Research Unit, University of Oulu, Oulu, Finland; Arctic Centre, University of Lapland, Rovaniemi, Finland Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland; Institute of Biology, University of Neuchâtel, Neuchâtel, Switzerland Asian School of the Environment, Nanyang Technological University, Singapore Soil Biology and Biochemistry, 0038-0717, 2022, 165, orcid:0000-0002-0523-2471 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-190965 doi:10.1016/j.soilbio.2021.108530 ISI:000776074700007 Scopus 2-s2.0-85121879013 info:eu-repo/semantics/openAccess Above- and belowground interactions C:N stoichiometry Carbon use efficiency Elevation gradient Microbial physiology Primary productivity Ecology Ekologi Soil Science Markvetenskap Article in journal info:eu-repo/semantics/article text 2022 ftumeauniv https://doi.org/10.1016/j.soilbio.2021.108530 2023-09-22T14:01:11Z Tundra ecosystems hold large stocks of soil organic matter (SOM), likely due to low temperatures limiting rates of microbial SOM decomposition more than those of SOM accumulation from plant primary productivity and microbial necromass inputs. Here we test the hypotheses that distinct tundra vegetation types and their carbon supply to characteristic rhizosphere microbes determine SOM cycling independent of temperature. In the subarctic Scandes, we used a three-way factorial design with paired heath and meadow vegetation at each of two elevations, and with each combination of vegetation type and elevation subjected during one growing season to either ambient light (i.e., ambient plant productivity), or 95% shading (i.e., reduced plant productivity). We assessed potential above- and belowground ecosystem linkages by uni- and multivariate analyses of variance, and structural equation modelling. We observed direct coupling between tundra vegetation type and microbial community composition and function, which underpinned the ecosystem's potential for SOM storage. Greater primary productivity at low elevation and ambient light supported higher microbial biomass and nitrogen immobilisation, with lower microbial mass-specific enzymatic activity and SOM humification. Congruently, larger SOM at lower elevation and in heath sustained fungal-dominated microbial communities, which were less substrate-limited, and invested less into enzymatic SOM mineralisation, owing to a greater carbon-use efficiency (CUE). Our results highlight the importance of tundra plant community characteristics (i.e., productivity and vegetation type), via their effects on soil microbial community size, structure and physiology, as essential drivers of SOM turnover. The here documented concerted patterns in above- and belowground ecosystem functioning is strongly supportive of using plant community characteristics as surrogates for assessing tundra carbon storage potential and its evolution under climate and vegetation changes. Article in Journal/Newspaper Subarctic Tundra Umeå University: Publications (DiVA) Soil Biology and Biochemistry 165 108530 |