Neighbour identity modifies effects of elevated temperature on plant performance in the High Arctic
Abstract Competition among plants in extreme environments such as the High Arctic has often been described as unimportant, or even nonexistent; environmental factors are thought to overrule any negative plant–plant interactions. However, few studies have actually addressed this question experimental...
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crwiley:10.1111/j.1365-2486.2004.00830.x 2024-06-23T07:49:38+00:00 Neighbour identity modifies effects of elevated temperature on plant performance in the High Arctic Dormann, Carsten F. Van Der Wal, René Woodin, Sarah J. 2004 http://dx.doi.org/10.1111/j.1365-2486.2004.00830.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2004.00830.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2004.00830.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 10, issue 9, page 1587-1598 ISSN 1354-1013 1365-2486 journal-article 2004 crwiley https://doi.org/10.1111/j.1365-2486.2004.00830.x 2024-06-04T06:41:29Z Abstract Competition among plants in extreme environments such as the High Arctic has often been described as unimportant, or even nonexistent; environmental factors are thought to overrule any negative plant–plant interactions. However, few studies have actually addressed this question experimentally in the Arctic, and those that did found only little evidence for competition. Such species interactions will presumably become more important in the future, as Global Climate Change takes effect on terrestrial ecosystems. We investigated plant–plant interactions in the High Arctic, following the growth of Luzula confusa and Salix polaris in pure and mixed stands, and under elevated‐temperature treatment over 2 years. To understand the mechanisms of competition, a parallel experiment was undertaken in phytotrons, manipulating competition, temperature and nutrient availability. Our findings indicate that competition is acting in the natural vegetation, and that climatic warming will alter the balance of interactions in favour of the dwarf shrub S. polaris . The phytotron experiment suggested that the mechanism is a higher responsiveness of Salix to nutrient availability, which increased under warming in the field. While Luzula showed a positive response to higher temperature in the lab, its performance in mixed stands in the field was actually reduced by warming, indicating a competitive repression of growth by Salix . The growth of Salix was also reduced by the presence of Luzula , but it was still able to profit from warming. Our findings suggest that climatic warming will result in greater shrub dominance of High Arctic tundra, but we also conjecture that grazing could reverse the situation to a graminoid‐dominated tundra. These two divergent scenarios would have different implications for ecosystem feedbacks to climatic change. Article in Journal/Newspaper Arctic Climate change Luzula confusa Salix polaris Tundra Wiley Online Library Arctic Global Change Biology 10 9 1587 1598 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Competition among plants in extreme environments such as the High Arctic has often been described as unimportant, or even nonexistent; environmental factors are thought to overrule any negative plant–plant interactions. However, few studies have actually addressed this question experimentally in the Arctic, and those that did found only little evidence for competition. Such species interactions will presumably become more important in the future, as Global Climate Change takes effect on terrestrial ecosystems. We investigated plant–plant interactions in the High Arctic, following the growth of Luzula confusa and Salix polaris in pure and mixed stands, and under elevated‐temperature treatment over 2 years. To understand the mechanisms of competition, a parallel experiment was undertaken in phytotrons, manipulating competition, temperature and nutrient availability. Our findings indicate that competition is acting in the natural vegetation, and that climatic warming will alter the balance of interactions in favour of the dwarf shrub S. polaris . The phytotron experiment suggested that the mechanism is a higher responsiveness of Salix to nutrient availability, which increased under warming in the field. While Luzula showed a positive response to higher temperature in the lab, its performance in mixed stands in the field was actually reduced by warming, indicating a competitive repression of growth by Salix . The growth of Salix was also reduced by the presence of Luzula , but it was still able to profit from warming. Our findings suggest that climatic warming will result in greater shrub dominance of High Arctic tundra, but we also conjecture that grazing could reverse the situation to a graminoid‐dominated tundra. These two divergent scenarios would have different implications for ecosystem feedbacks to climatic change. |
format |
Article in Journal/Newspaper |
author |
Dormann, Carsten F. Van Der Wal, René Woodin, Sarah J. |
spellingShingle |
Dormann, Carsten F. Van Der Wal, René Woodin, Sarah J. Neighbour identity modifies effects of elevated temperature on plant performance in the High Arctic |
author_facet |
Dormann, Carsten F. Van Der Wal, René Woodin, Sarah J. |
author_sort |
Dormann, Carsten F. |
title |
Neighbour identity modifies effects of elevated temperature on plant performance in the High Arctic |
title_short |
Neighbour identity modifies effects of elevated temperature on plant performance in the High Arctic |
title_full |
Neighbour identity modifies effects of elevated temperature on plant performance in the High Arctic |
title_fullStr |
Neighbour identity modifies effects of elevated temperature on plant performance in the High Arctic |
title_full_unstemmed |
Neighbour identity modifies effects of elevated temperature on plant performance in the High Arctic |
title_sort |
neighbour identity modifies effects of elevated temperature on plant performance in the high arctic |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1111/j.1365-2486.2004.00830.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2004.00830.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2004.00830.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Luzula confusa Salix polaris Tundra |
genre_facet |
Arctic Climate change Luzula confusa Salix polaris Tundra |
op_source |
Global Change Biology volume 10, issue 9, page 1587-1598 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2486.2004.00830.x |
container_title |
Global Change Biology |
container_volume |
10 |
container_issue |
9 |
container_start_page |
1587 |
op_container_end_page |
1598 |
_version_ |
1802640162571681792 |