山地河川における人間活動がアマゴの生息密度改変を介して底生動物に及ぼす間接的影響  [in Japanese] INDIRECT EFFECTS OF HUMAN ACTIVITIES ON STREAM INVERTEBRATES BY ALTERING SALMONID FISH DENSITY IN MOUNTAIN STREAMS.  [in Japanese]

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Abstract

The construction of erosion control dams and the alteration of riparian forest are known to have strong influences on the density of salmonid fish that dominate in mountain streams. Our objective was to elucidate the indirect effect of the dam construction and riparian alteration on stream invertebrates through the alteration of salmonid fish (<i>Oncorhynchus masou ishikawae</i>) density. The densities of two dominant invertebrate species, Baetis <i>yoshinensis</i> and Baetis <i>thermicus</i>, were low at study sites with high O. <i>masou</i> density. In conclusion, our study suggested that human activities indirectly affect stream invertebrates via changing fish abundance in mountain streams.

Journal

  • Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 68(4), I_691-I_696, 2012

    Japan Society of Civil Engineers

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