HSIモデルを用いたハルリンドウ(Gentiana thunbergii)の遺伝的多様性保全のための環境要因評価

概要

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In order to develop sustainable environmental management and conservation initiatives in the Toki-Shonai River basin, we assessed the influence of variety habitat variables to contribute to the number of individuals and the genetic diversity of Gentiana thunbergii, an indicator species of Satoyama in Japan. We then constructed two Habitat Suitability Indexes (HSI) to assess plant growth; the Population HSI model which measured plant density in quadrats (1 m^2) and the Genetic diversity HSI model to assess genetic diversity inferred from DNA polymorphisms of intergenic region between the tRNA^<ser>(UGA)〜ribosomal protein S4 in chloroplast DNA. Based on these HSI models, it appeared that the contribution of environmental factors toward the number of individuals differed from factors affecting genetic diversity. Based on these findings, it seems that when the topography of a natural habitat is subjected to extensive disturbance, such as during the development of land for housing, genetic diversity does not recover even if vegetation does. Conversely, habitat alteration such as forest succession that did not affect habitat topography, did not appear to decrease genetic diversity.
環境アセスメント学会の論文
2010-02-25