著者

伊奈 博彦 倉本 宣

出版者

社団法人日本造園学会

雑誌

ランドスケープ研究 : 日本造園学会誌 : journal of the Japanese Institute of Landscape Architecture (ISSN:13408984)

巻号頁・発行日

vol.66, no.5, pp.627-630, 2003-03-31

被引用文献数

9 4

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We investigated ten environment factors of habitat conditions of Lefua echigonia (Endangered Species) in small irrigation streams of Yato during an irrigation period and a non-irrigation period in 2002. Study area was three Yatos in Zushi-onoji Historical Environmental Conservation Area, Tokyo. Then the relationship between the existence of this species and the environmental factors at each period was analyzed. As the result, it was indicated that during the irrigation term, affective factors to the habitat of this species were physical environmental factors, substrate type and the presence of paddy fields on sides of stream. During the non-irrigation term, chemical environmental factors, substrate type and water velocity affected the habitat. Therefore, it was suggested that conservation measures should be different at each period.