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JDR Vol.3 No.3 pp. 206-215
(2008)
doi: 10.20965/jdr.2008.p0206

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Decreasing Processes and Conservation of Floodplain Species

Kazuya Ashizawa, Hisako Okada, and Noboru Kuramoto

School of Agriculture, Meiji University, 1-1-1 Higasi-mita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan

Received:
December 12, 2007
Accepted:
May 22, 2008
Published:
June 1, 2008
Creative Commons License
Keywords:
Aster kantoensis, floodplain, flood, habitat, seedling
Abstract
Japanese rivers flow rapidly, and flooding impacts significantly on floodplains, which consist of multiple habitats containing different species. Aster kantoensis Kitam., endemic to a narrow area of midstream cobble floodplains, is decreasing dramatically. Flooding effects on the A. kantoensis population are essentially negative in maintaining the population, but effects are partially positive in terms of reproduction. Large-scale flooding, for example, creates the spaces in the edge of cobble that are safe sites for seedling growth. Since A. kantoensis evolved on cobble floodplains, the flood impact in the past was not always negative. The fact that the number of A. kantoensis has dramatically decreased recently makes recovery from floods difficult. A project is now planned to restore cobble floodplains and their endemic species.
Cite this article as:
K. Ashizawa, H. Okada, and N. Kuramoto, “Decreasing Processes and Conservation of Floodplain Species,” J. Disaster Res., Vol.3 No.3, pp. 206-215, 2008.
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