Effects of lengthened growing season and soil warming on the phenology and physiology of Polygonum bistorta
Summary The phenological and physiological responses of arctic tundra plant species are key to predicting their survival in a warmer climate. One of the consequences of a warmer climate in the Arctic will be a longer growing season. We examined the effects of lengthened growing season and soil warmi...
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crwiley:10.1046/j.1365-2486.2000.00316.x 2024-09-30T14:30:40+00:00 Effects of lengthened growing season and soil warming on the phenology and physiology of Polygonum bistorta Starr, G.R.egory Oberbauer, Steven F. Pop, E.R.I.C. W. 2000 http://dx.doi.org/10.1046/j.1365-2486.2000.00316.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2486.2000.00316.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2486.2000.00316.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 6, issue 3, page 357-369 ISSN 1354-1013 1365-2486 journal-article 2000 crwiley https://doi.org/10.1046/j.1365-2486.2000.00316.x 2024-09-03T04:26:23Z Summary The phenological and physiological responses of arctic tundra plant species are key to predicting their survival in a warmer climate. One of the consequences of a warmer climate in the Arctic will be a longer growing season. We examined the effects of lengthened growing season and soil warming on the widely distributed forb, Polygonum bistorta L. Three treatments were established near Toolik Lake, Alaska in 1995 and 1996: extended season, extended season with soil warming, and an unmanipulated control. The season was extended by removing the snow load in the spring and keeping the treatments free of snow in the autumn. The spring snow removal extended the snow‐free period over that of controls by 8 d in 1995 and 24 d in 1996. As a result, the number of accumulated soil thaw days and consequently the depth of soil thaw increased on the treatment plots. Polygonum bistorta responded to the treatments by becoming active earlier and senescing earlier, resulting in a growth period of similar duration to that of the controls. Leaf size and leaf number were unaffected by the treatments, as were leaf photosynthetic assimilation rates and nutrient concentrations. The results indicate that internal constraints limit the response of this species to lengthened growing season, suggesting that it is a determinant or periodic species. With climate warming, this periodic growth will put P. bistorta at a competitive disadvantage relative to plants that can respond to lengthened growing season. Article in Journal/Newspaper Arctic Tundra Alaska Wiley Online Library Arctic Global Change Biology 6 3 357 369 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Summary The phenological and physiological responses of arctic tundra plant species are key to predicting their survival in a warmer climate. One of the consequences of a warmer climate in the Arctic will be a longer growing season. We examined the effects of lengthened growing season and soil warming on the widely distributed forb, Polygonum bistorta L. Three treatments were established near Toolik Lake, Alaska in 1995 and 1996: extended season, extended season with soil warming, and an unmanipulated control. The season was extended by removing the snow load in the spring and keeping the treatments free of snow in the autumn. The spring snow removal extended the snow‐free period over that of controls by 8 d in 1995 and 24 d in 1996. As a result, the number of accumulated soil thaw days and consequently the depth of soil thaw increased on the treatment plots. Polygonum bistorta responded to the treatments by becoming active earlier and senescing earlier, resulting in a growth period of similar duration to that of the controls. Leaf size and leaf number were unaffected by the treatments, as were leaf photosynthetic assimilation rates and nutrient concentrations. The results indicate that internal constraints limit the response of this species to lengthened growing season, suggesting that it is a determinant or periodic species. With climate warming, this periodic growth will put P. bistorta at a competitive disadvantage relative to plants that can respond to lengthened growing season. |
format |
Article in Journal/Newspaper |
author |
Starr, G.R.egory Oberbauer, Steven F. Pop, E.R.I.C. W. |
spellingShingle |
Starr, G.R.egory Oberbauer, Steven F. Pop, E.R.I.C. W. Effects of lengthened growing season and soil warming on the phenology and physiology of Polygonum bistorta |
author_facet |
Starr, G.R.egory Oberbauer, Steven F. Pop, E.R.I.C. W. |
author_sort |
Starr, G.R.egory |
title |
Effects of lengthened growing season and soil warming on the phenology and physiology of Polygonum bistorta |
title_short |
Effects of lengthened growing season and soil warming on the phenology and physiology of Polygonum bistorta |
title_full |
Effects of lengthened growing season and soil warming on the phenology and physiology of Polygonum bistorta |
title_fullStr |
Effects of lengthened growing season and soil warming on the phenology and physiology of Polygonum bistorta |
title_full_unstemmed |
Effects of lengthened growing season and soil warming on the phenology and physiology of Polygonum bistorta |
title_sort |
effects of lengthened growing season and soil warming on the phenology and physiology of polygonum bistorta |
publisher |
Wiley |
publishDate |
2000 |
url |
http://dx.doi.org/10.1046/j.1365-2486.2000.00316.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2486.2000.00316.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2486.2000.00316.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra Alaska |
genre_facet |
Arctic Tundra Alaska |
op_source |
Global Change Biology volume 6, issue 3, page 357-369 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-2486.2000.00316.x |
container_title |
Global Change Biology |
container_volume |
6 |
container_issue |
3 |
container_start_page |
357 |
op_container_end_page |
369 |
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1811635512201445376 |