Gender variation of Dryas octopetala along snowmelt and latitudinal gradients in the Subarctic and the High Arctic
We describe variations of floral traits of Dryas octopetala L. along a snowmelt gradient within and among three sites : 1) the Subarctic Latnjajaure in northernmost Sweden, 2) the High Arctic Longyearbyen and 3) Ny-Alesund, Svalbard in Norway, also High Arctic. Dryas octopetala had two types of flow...
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Department of Biosphere Science, Faculty of Science,Toyama University/Graduate School of Environmental Earth Science, Hokkaido University/Department of Biosphere Science, Faculty of Science,Toyama University
1999
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ftnipr:oai:nipr.repo.nii.ac.jp:00006134 2023-05-15T14:36:02+02:00 Gender variation of Dryas octopetala along snowmelt and latitudinal gradients in the Subarctic and the High Arctic Wada,Naoya Kudo,Gaku Kojima,Satoru 1999-02 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6134 http://id.nii.ac.jp/1291/00006134/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6134&item_no=1&attribute_id=18&file_no=1 en eng Department of Biosphere Science, Faculty of Science,Toyama University/Graduate School of Environmental Earth Science, Hokkaido University/Department of Biosphere Science, Faculty of Science,Toyama University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6134 http://id.nii.ac.jp/1291/00006134/ AA11327019 Polar bioscience, 12, 87-99(1999-02) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6134&item_no=1&attribute_id=18&file_no=1 Arctic Dryas octopetala femaleness sex allocation snowmelt Departmental Bulletin Paper P(論文) 1999 ftnipr 2023-03-04T20:18:29Z We describe variations of floral traits of Dryas octopetala L. along a snowmelt gradient within and among three sites : 1) the Subarctic Latnjajaure in northernmost Sweden, 2) the High Arctic Longyearbyen and 3) Ny-Alesund, Svalbard in Norway, also High Arctic. Dryas octopetala had two types of flowers, hermaphrodite flowers and male flowers, lacking any gynoecium. The frequency of male flowers was higher in late snow-melt habitats (i. e. late flowering populations) both at Latnjajaure and Ny-Alesund. Male flowers were significantly lighter in dry weight than hermaphrodite flowers; the difference was larger in the High Arctic than in the Subarctic, suggesting a higher resource limitation in male flowers in the High Arctic. Flower weight also varied among the three sites, and showed a significant difference along the latitudinal gradient both in hermaphrodite and male flowers. In the hermaphrodite flowers, the gynoecium dry weight differed among the three sites, being significantly heavier at Latnjajaure than at Longyearbyen and Ny-Alesund. As a result, the "femaleness" (gynoecium weight/androecium+gynoecium weight) showed significantly higher values at Latnjajaure than at Longyearbyen and Ny-Alesund. Thus, the floral allocation to female function in D. octopetala decreases with an increase in latitude from the Subarctic to the High Arctic. Gender variation of flowers is a size-dependent phenomenon; a positive correlation between flower size and femaleness was observed within each site. Report Arctic Dryas octopetala Longyearbyen Polar bioscience Subarctic Svalbard National Institute of Polar Research Repository, Japan Arctic Latnjajaure ENVELOPE(18.485,18.485,68.359,68.359) Longyearbyen Norway Svalbard |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
Arctic Dryas octopetala femaleness sex allocation snowmelt |
spellingShingle |
Arctic Dryas octopetala femaleness sex allocation snowmelt Wada,Naoya Kudo,Gaku Kojima,Satoru Gender variation of Dryas octopetala along snowmelt and latitudinal gradients in the Subarctic and the High Arctic |
topic_facet |
Arctic Dryas octopetala femaleness sex allocation snowmelt |
description |
We describe variations of floral traits of Dryas octopetala L. along a snowmelt gradient within and among three sites : 1) the Subarctic Latnjajaure in northernmost Sweden, 2) the High Arctic Longyearbyen and 3) Ny-Alesund, Svalbard in Norway, also High Arctic. Dryas octopetala had two types of flowers, hermaphrodite flowers and male flowers, lacking any gynoecium. The frequency of male flowers was higher in late snow-melt habitats (i. e. late flowering populations) both at Latnjajaure and Ny-Alesund. Male flowers were significantly lighter in dry weight than hermaphrodite flowers; the difference was larger in the High Arctic than in the Subarctic, suggesting a higher resource limitation in male flowers in the High Arctic. Flower weight also varied among the three sites, and showed a significant difference along the latitudinal gradient both in hermaphrodite and male flowers. In the hermaphrodite flowers, the gynoecium dry weight differed among the three sites, being significantly heavier at Latnjajaure than at Longyearbyen and Ny-Alesund. As a result, the "femaleness" (gynoecium weight/androecium+gynoecium weight) showed significantly higher values at Latnjajaure than at Longyearbyen and Ny-Alesund. Thus, the floral allocation to female function in D. octopetala decreases with an increase in latitude from the Subarctic to the High Arctic. Gender variation of flowers is a size-dependent phenomenon; a positive correlation between flower size and femaleness was observed within each site. |
format |
Report |
author |
Wada,Naoya Kudo,Gaku Kojima,Satoru |
author_facet |
Wada,Naoya Kudo,Gaku Kojima,Satoru |
author_sort |
Wada,Naoya |
title |
Gender variation of Dryas octopetala along snowmelt and latitudinal gradients in the Subarctic and the High Arctic |
title_short |
Gender variation of Dryas octopetala along snowmelt and latitudinal gradients in the Subarctic and the High Arctic |
title_full |
Gender variation of Dryas octopetala along snowmelt and latitudinal gradients in the Subarctic and the High Arctic |
title_fullStr |
Gender variation of Dryas octopetala along snowmelt and latitudinal gradients in the Subarctic and the High Arctic |
title_full_unstemmed |
Gender variation of Dryas octopetala along snowmelt and latitudinal gradients in the Subarctic and the High Arctic |
title_sort |
gender variation of dryas octopetala along snowmelt and latitudinal gradients in the subarctic and the high arctic |
publisher |
Department of Biosphere Science, Faculty of Science,Toyama University/Graduate School of Environmental Earth Science, Hokkaido University/Department of Biosphere Science, Faculty of Science,Toyama University |
publishDate |
1999 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6134 http://id.nii.ac.jp/1291/00006134/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6134&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(18.485,18.485,68.359,68.359) |
geographic |
Arctic Latnjajaure Longyearbyen Norway Svalbard |
geographic_facet |
Arctic Latnjajaure Longyearbyen Norway Svalbard |
genre |
Arctic Dryas octopetala Longyearbyen Polar bioscience Subarctic Svalbard |
genre_facet |
Arctic Dryas octopetala Longyearbyen Polar bioscience Subarctic Svalbard |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6134 http://id.nii.ac.jp/1291/00006134/ AA11327019 Polar bioscience, 12, 87-99(1999-02) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6134&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766308746027335680 |