瓯江口夏、秋季浮游动物种类组成及其多样性  

Species composition and diversity of zooplankton in Oujiang River estuary in summer and autumn.

作　　者：高倩[1] 徐兆礼[1] 

机构地区：[1]中国水产科学研究院东海水产研究所农业部海洋与河口渔业重点开放实验室,上海200090

出　　处：《生态学杂志》2009年第10期2048-2055,共8页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(40776047);中央级公益性科研院所基本科研业务费专项资助项目(2008M15)

摘　　要：依据2007年6和9月瓯江口水域两个航次的浮游动物调查资料,研究瓯江口浮游动物种类组成和多样性特征,并探索水团等因素对浮游动物优势种及物种多样性分布的影响。结果表明:调查水域共鉴定出浮游动物76种(不含18种浮游幼体和仔鱼),隶属于7门8纲20目41科,其中桡足类是最主要的优势类群;瓯江口水域浮游动物主要由亚热带种构成;就盐度适应而言,浮游动物种类数以外海种居多,而近海种在浮游动物总丰度中占有明显优势;秋季浮游动物种类数显著高于夏季;秋季的Shannon-Wiener多样性指数(2.89)明显高于夏季(2.23),这与秋季物种数较高有关;夏季水团交汇处的大门岛邻近水域多样性指数最高,秋季该水域多样性指数呈现从河口到外海逐渐增加的趋势。Based on the survey data of two cruises in June and September 2007, the species composition and biodiversity of zooplankton in Oujiang River estuary were studied, with the effects of water mass on them analyzed. A total of 76 species （excluding larvae and juvenile zooplankton, fish eggs, and larval fish） were collected, belonging to 41 families, 20 orders, 8 classes, and 7 phyla. Copepoda was most dominant. In this estuary, most of zooplankton species were subtropical species. The species number of offshore species was more than that of neritic species, but neritic species were numerically predominant. The species number was significantly greater in autumn than in summer, which was responsible for the significant difference of Shannon-Wiener index （H＇） between autumn （2. 89） and summer （2.23）. In summer, the area with the highest biodiversity was located at the waters off Damen Island, where several water masses mixed. The H＇ increased gradually from the estuary to the offshore.

关 键 词：瓯江口 浮游动物 多样性 群落 生态类群 

分 类 号：Q958.8[生物学—动物学]