Drivers of C cycling in three arctic-alpine plant communities
Recent vegetation changes in arctic-alpine tundra ecosystems may affect several ecosystem processes that regulate microbe and soil functions. Such changes can alter ecosystem carbon (C) cycling with positive feedback to the atmosphere if plant C uptake is less than the amount of soil C released. Her...
Published in: | Arctic, Antarctic, and Alpine Research |
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Language: | English |
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Taylor & Francis Group
2019
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Online Access: | https://doi.org/10.1080/15230430.2019.1592649 https://doaj.org/article/d5ea2678c14c48ad82de03ec40001355 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:d5ea2678c14c48ad82de03ec40001355 2023-05-15T14:14:23+02:00 Drivers of C cycling in three arctic-alpine plant communities Mia Vedel Sørensen Bente Jessen Graae Aimee Classen Brian J. Enquist Richard Strimbeck 2019-01-01 https://doi.org/10.1080/15230430.2019.1592649 https://doaj.org/article/d5ea2678c14c48ad82de03ec40001355 en eng Taylor & Francis Group 1523-0430 1938-4246 doi:10.1080/15230430.2019.1592649 https://doaj.org/article/d5ea2678c14c48ad82de03ec40001355 undefined Arctic, Antarctic, and Alpine Research, Vol 51, Iss 1, Pp 128-147 (2019) gross ecosystem photosynthesis respiration shrub expansion plant functional traits enzyme activity envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.1080/15230430.2019.1592649 2023-01-22T19:32:27Z Recent vegetation changes in arctic-alpine tundra ecosystems may affect several ecosystem processes that regulate microbe and soil functions. Such changes can alter ecosystem carbon (C) cycling with positive feedback to the atmosphere if plant C uptake is less than the amount of soil C released. Here, we examine how differences in plant functional traits, microbial activity, and soil processes within and across Salix-dominated shrub, dwarf shrub–dominated heath, and herb- and cryptogam-dominated meadow communities influence C cycling. We develop a hypothesized framework based on a priori model selection of variation in daytime growing season gross ecosystem photosynthesis (GEP) and above- and belowground respiration. The fluxes were standardized to light and temperature. Gross ecosystem photosynthesis was primarily related to soil moisture and secondarily to plant functional traits and aboveground biomass, and belowground respiration was dependent on the community weighted mean of specific leaf area (SLACWM). Similarly, microbial activity was linked with SLACWM and was highest in meadows, and carbon-degrading microbial activity decreased with vegetation woodiness. These results suggest that shrub expansion may influence summer C cycling differently depending on plant community, as belowground respiration might increase in the heath and decrease in the meadow communities. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic Tundra Unknown Arctic Arctic, Antarctic, and Alpine Research 51 1 128 147 |
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Open Polar |
collection |
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language |
English |
topic |
gross ecosystem photosynthesis respiration shrub expansion plant functional traits enzyme activity envir geo |
spellingShingle |
gross ecosystem photosynthesis respiration shrub expansion plant functional traits enzyme activity envir geo Mia Vedel Sørensen Bente Jessen Graae Aimee Classen Brian J. Enquist Richard Strimbeck Drivers of C cycling in three arctic-alpine plant communities |
topic_facet |
gross ecosystem photosynthesis respiration shrub expansion plant functional traits enzyme activity envir geo |
description |
Recent vegetation changes in arctic-alpine tundra ecosystems may affect several ecosystem processes that regulate microbe and soil functions. Such changes can alter ecosystem carbon (C) cycling with positive feedback to the atmosphere if plant C uptake is less than the amount of soil C released. Here, we examine how differences in plant functional traits, microbial activity, and soil processes within and across Salix-dominated shrub, dwarf shrub–dominated heath, and herb- and cryptogam-dominated meadow communities influence C cycling. We develop a hypothesized framework based on a priori model selection of variation in daytime growing season gross ecosystem photosynthesis (GEP) and above- and belowground respiration. The fluxes were standardized to light and temperature. Gross ecosystem photosynthesis was primarily related to soil moisture and secondarily to plant functional traits and aboveground biomass, and belowground respiration was dependent on the community weighted mean of specific leaf area (SLACWM). Similarly, microbial activity was linked with SLACWM and was highest in meadows, and carbon-degrading microbial activity decreased with vegetation woodiness. These results suggest that shrub expansion may influence summer C cycling differently depending on plant community, as belowground respiration might increase in the heath and decrease in the meadow communities. |
format |
Article in Journal/Newspaper |
author |
Mia Vedel Sørensen Bente Jessen Graae Aimee Classen Brian J. Enquist Richard Strimbeck |
author_facet |
Mia Vedel Sørensen Bente Jessen Graae Aimee Classen Brian J. Enquist Richard Strimbeck |
author_sort |
Mia Vedel Sørensen |
title |
Drivers of C cycling in three arctic-alpine plant communities |
title_short |
Drivers of C cycling in three arctic-alpine plant communities |
title_full |
Drivers of C cycling in three arctic-alpine plant communities |
title_fullStr |
Drivers of C cycling in three arctic-alpine plant communities |
title_full_unstemmed |
Drivers of C cycling in three arctic-alpine plant communities |
title_sort |
drivers of c cycling in three arctic-alpine plant communities |
publisher |
Taylor & Francis Group |
publishDate |
2019 |
url |
https://doi.org/10.1080/15230430.2019.1592649 https://doaj.org/article/d5ea2678c14c48ad82de03ec40001355 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Antarctic and Alpine Research Arctic Arctic Tundra |
genre_facet |
Antarctic and Alpine Research Arctic Arctic Tundra |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 51, Iss 1, Pp 128-147 (2019) |
op_relation |
1523-0430 1938-4246 doi:10.1080/15230430.2019.1592649 https://doaj.org/article/d5ea2678c14c48ad82de03ec40001355 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1080/15230430.2019.1592649 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
51 |
container_issue |
1 |
container_start_page |
128 |
op_container_end_page |
147 |
_version_ |
1766286873554059264 |