象山港、三门湾潮间带生态学研究──Ⅰ．种类组成与分布

Studies on intertidal zone ecology of the benthic fauna in Xiangshan Harbor and Sanmen Bay──Ⅰ. species composition and distribution

象山港和三门湾地处浙江沿岸带中部，这两个半封闭型港湾的软相潮间带底栖动物种类组成均以广温广布性种占多数，其次为亚热带性种。种类的分布与盐度、潮流流速、悬沙含量以及港湾屏蔽程度等环境因子有关。象山港种类多于三门湾，同一港湾种类呈现湾底多于湾中多于湾口的特点。

Situated on the middle coast of the Zhejiang Province, Xiangshan Harbor and Sanmen Bay belong to semi-enclosed harbors. As a nature of the species composition, the eurythermous species predominate absolutely over the others, and subtropical species come second in the soft-bottom of intertidal zone. The distribution of benthic species is related to salinity, tide flow speed, suspended sand quantity and sheltered degree of the harbor. The benthic species in the harbors increases gradually from the harbor mouth to bottom. The benthic species of Xiangshan Harbor are more than those of Sanmen Bay.