A comparison between a mid-latitude alpine (D. octopetala var. asiatica) and arctic and subarctic tundra (D. octopetala var. octopetala)
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Accession number;03A0574997
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| Title;A comparison between a mid-latitude alpine (D. octopetala var. asiatica) and arctic and subarctic tundra (D. octopetala var. octopetala) |
| Author;
WADA NAOYA
(Toyama Univ., Fac. of Sci.)
NAKAI YUMI
(Toyama Univ., Fac. of Sci.)
KUDO GAKU
(Hokkaido Univ., Graduate School of Environmental Earth Sci., JPN)
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Journal Title;Journal of Phytogeography and Taxonomy
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Journal Code:Y0534A
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ISSN:0388-6212
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VOL.51;NO.1;PAGE.49-57(2003)
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| Figure&Table&Reference;FIG.3, TBL.4, REF.25 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;We examined leaf traits (i.e. leaf size and shape,leaf dry mass per area (LMA) and leaf nitrogen concentration (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 alpine 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-.ANGS.lesund 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 variables and water availability. (author abst.) |
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