浙江近岸海域浮游动物的生态分布特征

根据2006年调查数据,研究浙江近岸海域浮游动物的种类组成、数量分布、优势种组成、生物多样性指数等生态指数及其随区域、季节的变化特征。结果表明,在种类组成方面,共有浮游动物164种,其中桡足类,水螅水母类,浮游幼虫类所占比例较高,其区域分布特征为浙江北部>浙江中部>浙江南部>杭州湾;随季节变化明显,总体上呈现夏秋多,春季较少特征。优势种组成和群落结构受水文要素影响明显,在不同的区域、季节都表现出显著的差异。密度和生物量随区域、季节有相同的变化特征,都表现为浙江北部>浙江中部>浙江南部>杭州湾,夏季>秋季>春季海域生物多样性指数的区域变化特征表现为浙江中部>浙江南部>浙江北部>杭州湾;在不同海域生物多样性指数的季节变化特征都表现为秋季>夏季>春季。浙江近岸海域浮游动物物种丰富,群落构成多样化,并且受海流、水团、温度等水文要素影响较显著。

Ecological Distributional Characteristics of Zooplankton in Zhejiang Sea Area Estuary

Based on the date of 2006,the paper study on the species composition,quantitative distribu-tion,dominant species,biodiversity index and their change characteristics with location and season in coastal areas of Zhejiang province.The results showed that including 164 species in totel analyzed area and the cope-poda,hydrozoan,medusa taking higher proportion;Regional distribution pattern of the species composition ranked in: northern Zhejiang > central Zhejiang > southern Zhejiang > Hangzhou bay.Species composition have an obvious change with season,were more in summer and autumn,less in spring.Dominant species and the community structure of zooplankton in coastal areas of Zhejiang province have an obvious change with hy-drological factors,and showed great difference in various regionals and season.Species density and community biomass have same variation characteristics with regionals and season.The sizes order of regional distribution were ranked in: northern Zhejiang > central Zhejiang > southern Zhejiang >Hangzhou bay.Regional distribu-tion pattern of biodivercity index of the four studied area ranked in central Zhejiang >southern Zhejiang>north-ern Zhejiang >Hangzhou bay.Their temporal ditribution showed great maximum in autumn,secondary maxi-mum in summer and minimum in spring.We can conclued that the value of community species diversity expo-nential is high,the community has a complex structure and abundant species in coastal areas of Zhejiang province,and they also were influenced significently by the hydrological factors,including,water mass,current,temperature and so on.