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Copepod Abundance and Species Composition of Tanshui River Estuary and Adjacent Waters

並列摘要


Tanshui River is the most important river of northern Taiwan, but has been polluted by industrial discharge and domestic sewage. In order to build up the baseline information of natural resource for management and protection of the estuarine ecosystem, we studied copepods, the dominant taxonomical group of the zooplankton, from the estuary and adjacent offshore waters in August, October, November 1996 and January 1997. In total, 62 species belonging to 27 genera and 17 families in Calanoida, Cyclopoida, Harpacticoida and Poecilostomatoida were identified. We found that the abundance of copepods in the estuary was lower than that in the offshore waters. This phenomenon may due to the out-flowing of polluted water from the Tanshui River. The species composition was found to be affected by environmental condition. The change of dominant species among the four sampling months exhibits a temporal variation of the copepod assemblages in this area. General pattern of production and peculiarity of local copepod fauna among various studies are discussed.

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