Functional group contributions to carbon fluxes in arctic-alpine ecosystems
Ongoing responses to climate change in arctic-alpine ecosystems, including the increasing dominance of deciduous shrubs, involve major shifts in plant functional group composition. Because rates of photosynthesis and respiration and their responses to temperature may vary among plant functional grou...
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/10.1080/15230430.2019.1578163 https://doaj.org/article/37e0193cc5d84d28a000362cf04059ca |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:37e0193cc5d84d28a000362cf04059ca 2023-05-15T14:14:22+02:00 Functional group contributions to carbon fluxes in arctic-alpine ecosystems G. Richard Strimbeck Bente Jessen Graae Simone Lang Mia Vedel Sørensen 2019-01-01 https://doi.org/10.1080/15230430.2019.1578163 https://doaj.org/article/37e0193cc5d84d28a000362cf04059ca en eng Taylor & Francis Group 1523-0430 1938-4246 doi:10.1080/15230430.2019.1578163 https://doaj.org/article/37e0193cc5d84d28a000362cf04059ca undefined Arctic, Antarctic, and Alpine Research, Vol 51, Iss 1, Pp 58-68 (2019) plant functional groups carbon sequestration plant respiration soil respiration net ecosystem exchange envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.1080/15230430.2019.1578163 2023-01-22T19:28:48Z Ongoing responses to climate change in arctic-alpine ecosystems, including the increasing dominance of deciduous shrubs, involve major shifts in plant functional group composition. Because rates of photosynthesis and respiration and their responses to temperature may vary among plant functional groups, a better understanding of their contributions to carbon fluxes will help improve predictions of how ecosystem changes will affect carbon source-sink relations in globally important tundra regions. We used a sequential harvest method to estimate growing season functional group contributions to net ecosystem exchange (NEE), ecosystem respiration (ER), and gross photosynthesis (GP) in alpine heath-, meadow-, and Salix-dominated shrub communities. We also partitioned ER into aboveground and belowground components in all three communities. Belowground efflux was the dominant component of ER in the heath and meadow communities (63 percent and 88 percent of ER, respectively) but contributed only approximately 40 percent of ER in the shrub community. The dominant functional group in each community contributed most to aboveground exchanges. Estimates for cryptogams were uncertain, but indicated a minor role for bryophytes and lichens in overall exchange. The results of our novel method of partitioning gas-exchange measurements suggest strong differences in the relative proportions of soil versus aboveground respiration and in the contributions of different functional groups in the net carbon exchange of three important arctic-alpine community types, with implications for changes in carbon dynamics as these systems respond to environmental change. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic Climate change Tundra Unknown Arctic Arctic, Antarctic, and Alpine Research 51 1 58 68 |
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Open Polar |
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fttriple |
language |
English |
topic |
plant functional groups carbon sequestration plant respiration soil respiration net ecosystem exchange envir geo |
spellingShingle |
plant functional groups carbon sequestration plant respiration soil respiration net ecosystem exchange envir geo G. Richard Strimbeck Bente Jessen Graae Simone Lang Mia Vedel Sørensen Functional group contributions to carbon fluxes in arctic-alpine ecosystems |
topic_facet |
plant functional groups carbon sequestration plant respiration soil respiration net ecosystem exchange envir geo |
description |
Ongoing responses to climate change in arctic-alpine ecosystems, including the increasing dominance of deciduous shrubs, involve major shifts in plant functional group composition. Because rates of photosynthesis and respiration and their responses to temperature may vary among plant functional groups, a better understanding of their contributions to carbon fluxes will help improve predictions of how ecosystem changes will affect carbon source-sink relations in globally important tundra regions. We used a sequential harvest method to estimate growing season functional group contributions to net ecosystem exchange (NEE), ecosystem respiration (ER), and gross photosynthesis (GP) in alpine heath-, meadow-, and Salix-dominated shrub communities. We also partitioned ER into aboveground and belowground components in all three communities. Belowground efflux was the dominant component of ER in the heath and meadow communities (63 percent and 88 percent of ER, respectively) but contributed only approximately 40 percent of ER in the shrub community. The dominant functional group in each community contributed most to aboveground exchanges. Estimates for cryptogams were uncertain, but indicated a minor role for bryophytes and lichens in overall exchange. The results of our novel method of partitioning gas-exchange measurements suggest strong differences in the relative proportions of soil versus aboveground respiration and in the contributions of different functional groups in the net carbon exchange of three important arctic-alpine community types, with implications for changes in carbon dynamics as these systems respond to environmental change. |
format |
Article in Journal/Newspaper |
author |
G. Richard Strimbeck Bente Jessen Graae Simone Lang Mia Vedel Sørensen |
author_facet |
G. Richard Strimbeck Bente Jessen Graae Simone Lang Mia Vedel Sørensen |
author_sort |
G. Richard Strimbeck |
title |
Functional group contributions to carbon fluxes in arctic-alpine ecosystems |
title_short |
Functional group contributions to carbon fluxes in arctic-alpine ecosystems |
title_full |
Functional group contributions to carbon fluxes in arctic-alpine ecosystems |
title_fullStr |
Functional group contributions to carbon fluxes in arctic-alpine ecosystems |
title_full_unstemmed |
Functional group contributions to carbon fluxes in arctic-alpine ecosystems |
title_sort |
functional group contributions to carbon fluxes in arctic-alpine ecosystems |
publisher |
Taylor & Francis Group |
publishDate |
2019 |
url |
https://doi.org/10.1080/15230430.2019.1578163 https://doaj.org/article/37e0193cc5d84d28a000362cf04059ca |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Antarctic and Alpine Research Arctic Arctic Climate change Tundra |
genre_facet |
Antarctic and Alpine Research Arctic Arctic Climate change Tundra |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 51, Iss 1, Pp 58-68 (2019) |
op_relation |
1523-0430 1938-4246 doi:10.1080/15230430.2019.1578163 https://doaj.org/article/37e0193cc5d84d28a000362cf04059ca |
op_rights |
undefined |
op_doi |
https://doi.org/10.1080/15230430.2019.1578163 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
51 |
container_issue |
1 |
container_start_page |
58 |
op_container_end_page |
68 |
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1766286868895236096 |