Responses of tundra plant community carbon flux to experimental warming, dominant species removal and elevation
Abstract Rising temperatures can influence ecosystem processes both directly and indirectly, through effects on plant species and communities. An improved understanding of direct versus indirect effects of warming on ecosystem processes is needed for robust predictions of the impacts of climate chan...
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Online Access: | http://dx.doi.org/10.1111/1365-2435.13567 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2435.13567 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13567 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2435.13567 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13567 |
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crwiley:10.1111/1365-2435.13567 2024-06-09T07:44:27+00:00 Responses of tundra plant community carbon flux to experimental warming, dominant species removal and elevation Sundqvist, Maja K. Sanders, Nathan J. Dorrepaal, Ellen Lindén, Elin Metcalfe, Daniel B. Newman, Gregory S. Olofsson, Johan Wardle, David A. Classen, Aimée T. Niu, Shuli 2020 http://dx.doi.org/10.1111/1365-2435.13567 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2435.13567 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13567 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2435.13567 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13567 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Functional Ecology volume 34, issue 7, page 1497-1506 ISSN 0269-8463 1365-2435 journal-article 2020 crwiley https://doi.org/10.1111/1365-2435.13567 2024-05-16T14:24:54Z Abstract Rising temperatures can influence ecosystem processes both directly and indirectly, through effects on plant species and communities. An improved understanding of direct versus indirect effects of warming on ecosystem processes is needed for robust predictions of the impacts of climate change on terrestrial ecosystem carbon (C) dynamics. To explore potential direct and indirect effects of warming on C dynamics in arctic tundra heath, we established a warming (open top chambers) and dominant plant species ( Empetrum hermaphroditum Hagerup) removal experiment at a high and low elevation site. We measured the individual and interactive effects of warming, dominant species removal and elevation on plant species cover, the normalized difference vegetation index (NDVI), leaf area index (LAI), temperature, soil moisture and instantaneous net ecosystem CO 2 exchange. We hypothesized that ecosystems would be stronger CO 2 sinks at the low elevation site, and that warming and species removal would weaken the CO 2 sink because warming should increase ecosystem respiration (ER) and species removal should reduce gross primary productivity (GPP). Furthermore, we hypothesized that warming and species removal would have the greatest impact on processes at the high elevation where site temperature should be most limiting and dominant species may buffer the overall community to environmental stress more compared to the low elevation site where plants are more likely to compete with the dominant species. The instantaneous CO 2 flux, which reflected a weak CO 2 sink, was similar at both elevations. Neither experimental warming nor dominant species removal significantly changed GPP or instantaneous net ecosystem CO 2 exchange even though species removal significantly reduced ER, NDVI and LAI. Our results show that even the loss of dominant plant species may not result in significant landscape‐scale responses of net ecosystem CO 2 exchange to warming. They also show that NDVI and LAI may be limited in their ability to ... Article in Journal/Newspaper Arctic Climate change Tundra Wiley Online Library Arctic Functional Ecology 34 7 1497 1506 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Rising temperatures can influence ecosystem processes both directly and indirectly, through effects on plant species and communities. An improved understanding of direct versus indirect effects of warming on ecosystem processes is needed for robust predictions of the impacts of climate change on terrestrial ecosystem carbon (C) dynamics. To explore potential direct and indirect effects of warming on C dynamics in arctic tundra heath, we established a warming (open top chambers) and dominant plant species ( Empetrum hermaphroditum Hagerup) removal experiment at a high and low elevation site. We measured the individual and interactive effects of warming, dominant species removal and elevation on plant species cover, the normalized difference vegetation index (NDVI), leaf area index (LAI), temperature, soil moisture and instantaneous net ecosystem CO 2 exchange. We hypothesized that ecosystems would be stronger CO 2 sinks at the low elevation site, and that warming and species removal would weaken the CO 2 sink because warming should increase ecosystem respiration (ER) and species removal should reduce gross primary productivity (GPP). Furthermore, we hypothesized that warming and species removal would have the greatest impact on processes at the high elevation where site temperature should be most limiting and dominant species may buffer the overall community to environmental stress more compared to the low elevation site where plants are more likely to compete with the dominant species. The instantaneous CO 2 flux, which reflected a weak CO 2 sink, was similar at both elevations. Neither experimental warming nor dominant species removal significantly changed GPP or instantaneous net ecosystem CO 2 exchange even though species removal significantly reduced ER, NDVI and LAI. Our results show that even the loss of dominant plant species may not result in significant landscape‐scale responses of net ecosystem CO 2 exchange to warming. They also show that NDVI and LAI may be limited in their ability to ... |
author2 |
Niu, Shuli |
format |
Article in Journal/Newspaper |
author |
Sundqvist, Maja K. Sanders, Nathan J. Dorrepaal, Ellen Lindén, Elin Metcalfe, Daniel B. Newman, Gregory S. Olofsson, Johan Wardle, David A. Classen, Aimée T. |
spellingShingle |
Sundqvist, Maja K. Sanders, Nathan J. Dorrepaal, Ellen Lindén, Elin Metcalfe, Daniel B. Newman, Gregory S. Olofsson, Johan Wardle, David A. Classen, Aimée T. Responses of tundra plant community carbon flux to experimental warming, dominant species removal and elevation |
author_facet |
Sundqvist, Maja K. Sanders, Nathan J. Dorrepaal, Ellen Lindén, Elin Metcalfe, Daniel B. Newman, Gregory S. Olofsson, Johan Wardle, David A. Classen, Aimée T. |
author_sort |
Sundqvist, Maja K. |
title |
Responses of tundra plant community carbon flux to experimental warming, dominant species removal and elevation |
title_short |
Responses of tundra plant community carbon flux to experimental warming, dominant species removal and elevation |
title_full |
Responses of tundra plant community carbon flux to experimental warming, dominant species removal and elevation |
title_fullStr |
Responses of tundra plant community carbon flux to experimental warming, dominant species removal and elevation |
title_full_unstemmed |
Responses of tundra plant community carbon flux to experimental warming, dominant species removal and elevation |
title_sort |
responses of tundra plant community carbon flux to experimental warming, dominant species removal and elevation |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/1365-2435.13567 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2435.13567 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13567 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2435.13567 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13567 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Tundra |
genre_facet |
Arctic Climate change Tundra |
op_source |
Functional Ecology volume 34, issue 7, page 1497-1506 ISSN 0269-8463 1365-2435 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/1365-2435.13567 |
container_title |
Functional Ecology |
container_volume |
34 |
container_issue |
7 |
container_start_page |
1497 |
op_container_end_page |
1506 |
_version_ |
1801373193983754240 |