生物化工专题数据库-----海洋生物

 

[篇名]

三峡工程蓄水前后秋季长江口鱼类浮游生物群落结构的动态变化初探

[著者]

单秀娟;武云飞

[机构]

中国科学院海洋研究所海洋生态与环境重点实验室，山东 青岛 266071; 中国海洋大学水产养殖教育部重点实验室，山东 青岛 266003

[中文关键词]

三峡工程; 长江口; 鱼类浮游生物; 群落结构; 时空变化

[外文关键词]

Three-Gorges Dam; Changjiang River Estuary; ichtyoplankton; community structure; temporal-spatial patterns

[分类号]

S931.5

[刊名]

中国海洋大学学报

[出版时间]

2005年6月

[来源]

 VOL35,NO.6._936—940

[中文摘要]

对长江口及其邻近海域2002年秋季与2003年秋季鱼类浮游生物的调查资料进行比较,分析三峡工程蓄水前后秋季长江口鱼类浮游生物群落结构特征变化。结果发现,蓄水后鱼类浮游生物种类和数量比蓄水前有所增加,群落结构和时空分布特征发生了明显的改变,一些分布在黄渤海的种类如方氏云等开始在东海出现,并且部分鱼类的生殖时间上也发生了改变。利用相对重要性指数(IRI)对长江口鱼类浮游生物进行优势度检验,其优势种成分也发生了很大的变化,虽仍是以小型种类为主,但原占绝对优势的日本优势度开始逐渐下降,成为常见种,而康氏小公鱼的数量急剧上升。阐明了长江口鱼类资源的补充及群落结构和多样性变化规律及其与环境的关系,为动态监测三峡工程对河口生态环境的影响提供科学依据。

[外文摘要]

An analysis was made of the data obtained in comprehensive surveys on the fisheries ecology and oceanography in the Changjiang River estuary.Eleven species of ichthyoplankton were recorded with 35 eggs and 29 larvae in November,2002,while 14 species were recorded with 24 eggs and 85 larvae in November,2003,which showed the species and quantities of ichthyoplankton in 2003 were more than those in 2002, and the ichthyoplankton community structure and its spatiotemporal dynamics were notably changed.The specie...