南麂列岛海洋自然保护区潮间带软体动物生态研究

Ecological Study on mollusca of the intertidal zone in Nanji Archipalego Marine Nature Reserve

本研究结果表明，共鉴定出软体动物１４３种，其中１８种为该区域首次记录。根据种类相似性指数，将其分成５个生态群落：即开敞岩礁群落，隐蔽岩礁群落，巨砾群落，泥滩群落，沙滩群落。文中对各群落的种类组成、数量分布、季节变化及多样性指数等作了分析；同时对影响软体动物生态分布的潮汐、波浪、底质类型和生物因子等作了探讨。

species of mollusca were obtained from the intertidal zone of Nanji Archipalego Marine Nature Reserve during May 1992 tO March 1993, of which 18 species are newly recorded in this area. According to the distribution of faunae, mollusca of Nanji Archipalego belongs to the ChinaJapan subfauna of the Indian-Western Pacific biogeographic region.Five ecological groups were distinguished using species similarity indices, i. e. sandy beach community, mud flat community, giant rock community, shettered rocky shore community and exposed rocky shore community. Species composition, diversity, biomass and individual numbers changing with seasonal variations and influenced by environmental parameters were analyzed. Habitat form, sea currents and wave action are the key factors for determining community ecosystem and the fauna characters.