Evaluation of Relationship Between Biological Safety and Benthic Macroinvertebrate Assemblages in the Sakawa River System, Japan

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概要

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• The objective of this study was to assess the biological safety and river health in an actual river and to clarify their relationship. In this study, "biological safety" meant safety level of contaminants in river water to aquatic creatures, which was evaluated by performing various bioassays. "River health" meant conditions of water quality and biodiversity from a viewpoint of benthic macroinvertebrate assemblages, which was desired by humans. At nine sites on the Sakawa River system (Japan), biological safety was evaluated as a toxicity score and bio-safety rank (BSR) using an algae growth inhibition test, a daphnia immobilization test, and a larval medaka assay. According to the result, the biological safety was found to be completely different among the sampling sites and the test species. River health was evaluated according to the Ministry of the Environment (MOE) of Japan water quality and biodiversity (taxa number) at the nine sites. According to the result, the number of taxa were found to be completely different among the sites. The results of the bioassays and macroinvertebrate collections were compared and indicated that the number of taxa and BSR described similar behavior when going downstream, although no clear correlation was found between BSR and MOE-water quality class. Therefore, biodiversity tended to deteriorate as the intensity of toxicity became more severe.

• Japan Society on Water Environmentの論文

著者

• Urano Kohei

  Graduate School Of Environment And Information Sciences Yokohama National University

• URANO Kohei

  Graduate School of Environment and Information Sciences, Yokohama National University, Japan

• KUBO Takashi

  Joint Research Center, Nagasaki University, Japan

• YUSA Natsumi

  Graduate School of Environment and Information Sciences, Yokohama National University, Japan

• KAMEYA Takashi

  Graduate School of Environment and Information Sciences, Yokohama National University, Japan

• WEI Dongbin

  Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, PR China

• KISUNO Akira

  Graduate School of Environment and Information Sciences, Yokohama National University, Japan

関連論文

• Production of Trichloromethylphenol from Organo-phosphorus Pesticide Fenitrothion by Chlorination
• Mutagenicity Characteristics of 255 Environmental Chemicals
• River Environment Evaluation Using Biodiversity Information of Benthic Organisms
• Evaluation of Relationship Between Biological Safety and Benthic Macroinvertebrate Assemblages in the Sakawa River System, Japan

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