Ecophysiological differences among Leymus mollis populations across a subarctic dune system caused by environmental, not genetic, factors
International audience Plant species that persist during succession, from the colonization to the stabilization stages, face major environmental changes. Such changes are believed to have significant effects on species performance. In subarctic coastal dune systems, Leymus mollis colonizes the embry...
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fttriple:oai:gotriple.eu:10670/1.4am83m 2023-05-15T16:35:28+02:00 Ecophysiological differences among Leymus mollis populations across a subarctic dune system caused by environmental, not genetic, factors Imbert, Eric Houle, G. Centre d'Etudes Nordiques et Département de Biologie Université Laval Québec (ULaval) Département de Biologie Québec Institut de Biologie Intégrative et des Systèmes Québec (IBIS)-Université Laval Québec (ULaval) 2000-01-01 https://doi.org/10.1111/j.1469-8137.2000.00724.x https://hal.archives-ouvertes.fr/halsde-00343608 en eng HAL CCSD Wiley halsde-00343608 doi:10.1111/j.1469-8137.2000.00724.x 10670/1.4am83m https://hal.archives-ouvertes.fr/halsde-00343608 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0028-646X EISSN: 1469-8137 New Phytologist New Phytologist, Wiley, 2000, 147 (3), pp.601 - 608. ⟨10.1111/j.1469-8137.2000.00724.x⟩ coastal dune ecophysiology environmental plasticity Leymus mollis primary succession subarctic Quebec envir socio Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2000 fttriple https://doi.org/10.1111/j.1469-8137.2000.00724.x 2023-01-22T18:02:38Z International audience Plant species that persist during succession, from the colonization to the stabilization stages, face major environmental changes. Such changes are believed to have significant effects on species performance. In subarctic coastal dune systems, Leymus mollis colonizes the embryo dunes, on the upper limit of the beach. It reaches its maximum density on the foredune, but also grows on older, stabilized ridges. This paper reports on the phenotypic variations of some ecophysiological traits associated with the persistence of L. mollis on a dune system on the east coast of Hudson Bay (northern Quebec). Leymus mollis ramets tend to have a lower net carbon assimilation rate and water use efficiency, and a higher substomatal CO2 concentration on the stabilized dune than on the foredune. However, these physiological differences cannot be explained by differences in leaf morphology or nitrogen content. Under controlled conditions, ecophysiological differences observed in the field disappear, suggesting that these are not genetic but determined by environmental changes along the foredune-stabilized dune gradient. We propose that higher net carbon assimilation rate on the foredune might be related to higher sink strength in relation to the growth-stimulating effect of sand burial. Article in Journal/Newspaper Hudson Bay Subarctic Unknown Hudson Hudson Bay |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
coastal dune ecophysiology environmental plasticity Leymus mollis primary succession subarctic Quebec envir socio |
spellingShingle |
coastal dune ecophysiology environmental plasticity Leymus mollis primary succession subarctic Quebec envir socio Imbert, Eric Houle, G. Ecophysiological differences among Leymus mollis populations across a subarctic dune system caused by environmental, not genetic, factors |
topic_facet |
coastal dune ecophysiology environmental plasticity Leymus mollis primary succession subarctic Quebec envir socio |
description |
International audience Plant species that persist during succession, from the colonization to the stabilization stages, face major environmental changes. Such changes are believed to have significant effects on species performance. In subarctic coastal dune systems, Leymus mollis colonizes the embryo dunes, on the upper limit of the beach. It reaches its maximum density on the foredune, but also grows on older, stabilized ridges. This paper reports on the phenotypic variations of some ecophysiological traits associated with the persistence of L. mollis on a dune system on the east coast of Hudson Bay (northern Quebec). Leymus mollis ramets tend to have a lower net carbon assimilation rate and water use efficiency, and a higher substomatal CO2 concentration on the stabilized dune than on the foredune. However, these physiological differences cannot be explained by differences in leaf morphology or nitrogen content. Under controlled conditions, ecophysiological differences observed in the field disappear, suggesting that these are not genetic but determined by environmental changes along the foredune-stabilized dune gradient. We propose that higher net carbon assimilation rate on the foredune might be related to higher sink strength in relation to the growth-stimulating effect of sand burial. |
author2 |
Centre d'Etudes Nordiques et Département de Biologie Université Laval Québec (ULaval) Département de Biologie Québec Institut de Biologie Intégrative et des Systèmes Québec (IBIS)-Université Laval Québec (ULaval) |
format |
Article in Journal/Newspaper |
author |
Imbert, Eric Houle, G. |
author_facet |
Imbert, Eric Houle, G. |
author_sort |
Imbert, Eric |
title |
Ecophysiological differences among Leymus mollis populations across a subarctic dune system caused by environmental, not genetic, factors |
title_short |
Ecophysiological differences among Leymus mollis populations across a subarctic dune system caused by environmental, not genetic, factors |
title_full |
Ecophysiological differences among Leymus mollis populations across a subarctic dune system caused by environmental, not genetic, factors |
title_fullStr |
Ecophysiological differences among Leymus mollis populations across a subarctic dune system caused by environmental, not genetic, factors |
title_full_unstemmed |
Ecophysiological differences among Leymus mollis populations across a subarctic dune system caused by environmental, not genetic, factors |
title_sort |
ecophysiological differences among leymus mollis populations across a subarctic dune system caused by environmental, not genetic, factors |
publisher |
HAL CCSD |
publishDate |
2000 |
url |
https://doi.org/10.1111/j.1469-8137.2000.00724.x https://hal.archives-ouvertes.fr/halsde-00343608 |
geographic |
Hudson Hudson Bay |
geographic_facet |
Hudson Hudson Bay |
genre |
Hudson Bay Subarctic |
genre_facet |
Hudson Bay Subarctic |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0028-646X EISSN: 1469-8137 New Phytologist New Phytologist, Wiley, 2000, 147 (3), pp.601 - 608. ⟨10.1111/j.1469-8137.2000.00724.x⟩ |
op_relation |
halsde-00343608 doi:10.1111/j.1469-8137.2000.00724.x 10670/1.4am83m https://hal.archives-ouvertes.fr/halsde-00343608 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1111/j.1469-8137.2000.00724.x |
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1766025695331352576 |