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Vol.36 No.3
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Distribution of Aucuba japonica in two contrasting geobotanical regions of Japan: An analysis of adaptation mode

Journal of Ecology and Environment / Journal of Ecology and Environment, (P)2287-8327; (E)2288-1220
2013, v.36 no.3, pp.173-181
https://doi.org/10.5141/ecoenv.2013.173
Md. Sohrab Ali (Department of Environment, E-16, Agarga)
Kihachiro Kikuzawa (Ishikawa Prefectural University)
Md., S. A. , & Kihachiro, K. (2013). Distribution of Aucuba japonica in two contrasting geobotanical regions of Japan: An analysis of adaptation mode. Journal of Ecology and Environment, 36(3), 173-181, https://doi.org/10.5141/ecoenv.2013.173
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Abstract

Two varieties of Aucuba japonica differ in ways that can be considered adaptive to differing geo-climatic conditions in their respective distribution ranges. Irrespective of growth stage, the mean leaf size of A. japonica var. japonica was significantly larger than A. japonica var. borealis. Smaller leaf size and ultimately smaller stature of A. japonica var. borealis are an advantage under the higher snow load and lower temperatures in the forests along the East Sea where the variety grows. Snow load also acted as an important driving force for structural modifications of A. japonica var. borealis from cellular level in leaves to the organization of branch extension growth. Global warming by changing snowfall patterns in Japan may lead to range shifts in the two varieties of A. japonica.

keywords
adaptation, Aucuba japonica, ecotypic variation, geo-climate, plant growth attributes, snow effects

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