宁波海岛潮阎带生态学研究──Ⅰ．种类组成与分布

Studies on ecology of intertidal zone around Ningbo islands.──Ⅰ. species composition and distribution

本文研究了宁波海岛潮间带的生物种类组成与分布规律。生物种类以软体动物（１１３种）、甲壳动物（６５种）、多毛类（３６种）及藻类（３０种）为主。生物区系性质以广温广布种和亚热带种为主。不同底质潮间带中生物种类数不同，泥沙滩多于岩礁多于沙滩。岩礁潮间带生物种类数的水平分布为由近岸向外海增加。泥沙质潮间带生物种类数的水平分布为由北部向南部增加。沙质潮间带的生物种类数极其稀少。垂直分布与潮汐和底质有关。

The results of the survey to intertidal zone of Ningbo Islands during April-May 1990 and September-November 1990 are presented. 281 benthic species are identified, there are 30species of algae, 36 species of polychaetes, 113 species of molluscs and 65 species of crustaceans. As a faunal nature, the eurytherous-eurytopic species and subtropical species predominate over the others. The horizontal distribution of species number is larger on muddy shore (178 species) than that on rocky shore (95 species) and sandy shore (12 species). The characteristics of the composition of species are mainly related to environmental factors. such as sediments form and tidal flow. The vertical distribution of biological species are also discussed.