Stratégie de tolérance au vent chez Salix uva-ursi , une espèce de la toundra du Nouveau-Québec (Canada)
Salix uva-ursi Pursh is a prostrate shrub typical of windy arctic–alpine tundra sites of eastern North America. According to Grime's thesis, plants living in growth-limiting conditions should satisfy the following criteria: (1) limited growth rate, (2) extended individual longevity, (3) reduced...
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1988
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Online Access: | http://dx.doi.org/10.1139/b88-045 http://www.nrcresearchpress.com/doi/pdf/10.1139/b88-045 |
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crcansciencepubl:10.1139/b88-045 2023-12-17T10:26:19+01:00 Stratégie de tolérance au vent chez Salix uva-ursi , une espèce de la toundra du Nouveau-Québec (Canada) Bélisle, Luc Maillette, Lucie 1988 http://dx.doi.org/10.1139/b88-045 http://www.nrcresearchpress.com/doi/pdf/10.1139/b88-045 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 66, issue 2, page 272-279 ISSN 0008-4026 Plant Science journal-article 1988 crcansciencepubl https://doi.org/10.1139/b88-045 2023-11-19T13:39:02Z Salix uva-ursi Pursh is a prostrate shrub typical of windy arctic–alpine tundra sites of eastern North America. According to Grime's thesis, plants living in growth-limiting conditions should satisfy the following criteria: (1) limited growth rate, (2) extended individual longevity, (3) reduced allocation to reproduction, (4) infrequent reproduction, (5) regeneration by vegetative multiplication or seedling bank rather man seed bank, (6) reduced plasticity, and (7) persistent leaves. Salix uva-ursi displays a few of these criteria (1, 2, 4) and is capable of layering (5). However, contrary to Grime's conditions (3, 6, and 5, respectively), allocation of annual biomass to reproduction is considerable, structure is variable, depending on wind exposure, and a seedling bank is absent and regeneration depends in part on a large number of small, wind-dispersed seeds. Thus S. uva-ursi takes advantage of wind, which is usually a limiting factor, to reach the few favorable microhabitats of an otherwise inhospitable environment. Finally, the leaves of S. uva-ursi die each fall (contrary to 7) but remain attached to the plant for several years. This may increase the boundary layer in winter and allow for protection against snow erosion. Salix uva-ursi dominates sites with very high levels of stress but its biology is not always consistent with Grime's predictions of the stress tolerance strategy. Article in Journal/Newspaper Arctic toundra Tundra Canadian Science Publishing (via Crossref) Arctic Canada Canadian Journal of Botany 66 2 272 279 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Plant Science |
spellingShingle |
Plant Science Bélisle, Luc Maillette, Lucie Stratégie de tolérance au vent chez Salix uva-ursi , une espèce de la toundra du Nouveau-Québec (Canada) |
topic_facet |
Plant Science |
description |
Salix uva-ursi Pursh is a prostrate shrub typical of windy arctic–alpine tundra sites of eastern North America. According to Grime's thesis, plants living in growth-limiting conditions should satisfy the following criteria: (1) limited growth rate, (2) extended individual longevity, (3) reduced allocation to reproduction, (4) infrequent reproduction, (5) regeneration by vegetative multiplication or seedling bank rather man seed bank, (6) reduced plasticity, and (7) persistent leaves. Salix uva-ursi displays a few of these criteria (1, 2, 4) and is capable of layering (5). However, contrary to Grime's conditions (3, 6, and 5, respectively), allocation of annual biomass to reproduction is considerable, structure is variable, depending on wind exposure, and a seedling bank is absent and regeneration depends in part on a large number of small, wind-dispersed seeds. Thus S. uva-ursi takes advantage of wind, which is usually a limiting factor, to reach the few favorable microhabitats of an otherwise inhospitable environment. Finally, the leaves of S. uva-ursi die each fall (contrary to 7) but remain attached to the plant for several years. This may increase the boundary layer in winter and allow for protection against snow erosion. Salix uva-ursi dominates sites with very high levels of stress but its biology is not always consistent with Grime's predictions of the stress tolerance strategy. |
format |
Article in Journal/Newspaper |
author |
Bélisle, Luc Maillette, Lucie |
author_facet |
Bélisle, Luc Maillette, Lucie |
author_sort |
Bélisle, Luc |
title |
Stratégie de tolérance au vent chez Salix uva-ursi , une espèce de la toundra du Nouveau-Québec (Canada) |
title_short |
Stratégie de tolérance au vent chez Salix uva-ursi , une espèce de la toundra du Nouveau-Québec (Canada) |
title_full |
Stratégie de tolérance au vent chez Salix uva-ursi , une espèce de la toundra du Nouveau-Québec (Canada) |
title_fullStr |
Stratégie de tolérance au vent chez Salix uva-ursi , une espèce de la toundra du Nouveau-Québec (Canada) |
title_full_unstemmed |
Stratégie de tolérance au vent chez Salix uva-ursi , une espèce de la toundra du Nouveau-Québec (Canada) |
title_sort |
stratégie de tolérance au vent chez salix uva-ursi , une espèce de la toundra du nouveau-québec (canada) |
publisher |
Canadian Science Publishing |
publishDate |
1988 |
url |
http://dx.doi.org/10.1139/b88-045 http://www.nrcresearchpress.com/doi/pdf/10.1139/b88-045 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic toundra Tundra |
genre_facet |
Arctic toundra Tundra |
op_source |
Canadian Journal of Botany volume 66, issue 2, page 272-279 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b88-045 |
container_title |
Canadian Journal of Botany |
container_volume |
66 |
container_issue |
2 |
container_start_page |
272 |
op_container_end_page |
279 |
_version_ |
1785578033335238656 |