立山におけるチョウノスケソウの個葉特性 中緯度高山帯と寒帯・亜寒帯ツンドラとの比較
We examined leaf traits(i.e. leaf size and shape, leaf dry mass per area(LMA)and leaf nitrogen concentra-tion(LNC))of mountain avens(Dryas octopetala L.)growing at the southernmost extent of its geographical range (mid-latitude alpine), in Tateyama Mts., central Japan. We then compared leaf traits a...
Main Authors: | , , |
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Format: | Article in Journal/Newspaper |
Language: | Japanese |
Published: |
植物地理・分類学会 = The Society for the Study of Phytogeography and Taxonomy
2003
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Subjects: | |
Online Access: | http://hdl.handle.net/2297/48524 https://kanazawa-u.repo.nii.ac.jp/?action=repository_uri&item_id=12905 https://kanazawa-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=12905&item_no=1&attribute_id=26&file_no=1 |
Summary: | We examined leaf traits(i.e. leaf size and shape, leaf dry mass per area(LMA)and leaf nitrogen concentra-tion(LNC))of mountain avens(Dryas octopetala L.)growing at the southernmost extent of its geographical range (mid-latitude alpine), in Tateyama Mts., central Japan. We then compared leaf traits among a mid-latitude al-pine population(D. octopetala L. var. asiatica(Nakai)Nakai)and high-latitude subarctic and arctic populations (D. octopetala L. var. octopetala), using data-set of four different populations already reported by Kudo et al.(2001). A mid-latitude population(Tateyama)had a rotunda-shaped lamina with larger leaf area, while a high-latitude arctic population(Ny-Alesund in Svalbard)showed an elliptical lamina with smaller leaf area. LMA was remarkably lower but LNC was greatly higher in a mid-latitude population than in subarctic(northern Sweden) and high arctic populations. When all data(mean values in each population)were pooled, a negative relationship between LMA and LNC was detected significantly among populations(r= -0.93, P = 0.02). We discussed these geographical variations in leaf traits from mid-latitude alpine to high arctic tundra in relation to climate vari-ables and water availability. |
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