溶存酸素環境の変化に伴うマクロベントス群集の構造と機能の変化予測手法

概要

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In Mikawa Bay, central Japan, where hypoxia is observed annually, water temperature and oxygen concentrations near the bottom were measured continuously for about two months during the summers of 1997 and 1998 Samples of macrobenthos were also collected at weekly intervals. In order to analyze the factors causing temporal variation in the macrobenthic community, a new index called the "cumulative relative sensitivity index of mortality by hypoxia" ("czox") was proposed by the authors. The czox index is calculated from water temperature and oxygen concentration data. This study examined the relationship between the czox index and the biomass of dominant species, water purification and biodiversity of the macrobenthos. Relationships between czox and these parameters were examined using regression analyses, etc. These analyses represented well previous knowledge about relationships between the environment and macrobenthic community. This suggests that it is possible to predict changes in the macrobenthic community structure and function when oxygen concentrations change with human activities such as environmental habitat restoration.
日本水産工学会の論文
2004-06-07