春季东海区近海浮游动物群落结构及其影响因子

研究了 2 0 0 3年春季东海区 (2 7°0 0′～ 34°0 0′N)禁渔线附近近海浮游动物群落结构及其影响因子。根据各站位浮游动物种类组成和丰度 ,用聚类分析法可将该海域的浮游动物分为 5个群落。群落Ⅰ的优势种为 :中华哲水蚤、强额拟哲水蚤、尖额唇角水蚤和强壮箭虫 ;群落Ⅱ的优势种为 :中华哲水蚤、小哲水蚤和小拟哲水蚤 ;群落Ⅲ的优势种为 :中华哲水蚤、亚强真哲水蚤、普通波水蚤 ;群落Ⅳ的优势种为 :中华哲水蚤和五角水母 ;群落Ⅴ的优势种为 :孔雀唇角水蚤、丹氏纺缍水蚤、中华哲水蚤和刺尾纺缍水蚤。另外 ,在春季影响该海域浮游动物分布的主要非生物因子的可集中体现在纬度因子方面。

Preliminary study on the zooplankton community structure and its influential factors in the offshore waters of the East China Sea in spring

The zooplankton quantitative distribution was studied from 33 vertical trawl zooplankton survey around the prohibited fishing line in the offshore waters of the East China Sea (27°00′～34°00′N) in spring, 2003. On the basis of the species composition and abundance, the zooplankton was identified with the cluster analysis to 5 communities: communityⅠwhich dominated by Calanus sinicus,Paracalanus crassirostris, Labidocera acuta and Sagitta crassa; community Ⅱ by Calanus sinicus, Nannocalanus minor and Paracalanus parvus; community Ⅲ by Calanus sinicus, Eucalanus subcrassus and Undinula vulgaris; community Ⅳ by Calanus sinicus and Muggiaea atlantica; community Ⅴ by Labidocera pavo, Acartia danae, Calanus sinicus and Acartia spinicauda. The abiotic factors, which influence the zooplankton distribution and abundance in the surveyed sea area, can be attributed to the latitude in spring.