摘要
根据2000年秋季和2001年春季对黄、东海大面调查中浮游生物大网(孔径500μm)采集的浮游动物样品,运用多元分析方法对陆架区内的浮游动物组成、分布、群落进行了研究。结果表明,春、秋两季陆架区浮游动物均可划分为5个群落:i黄海沿岸群落;ii黄海中部群落;iii黄、东海交汇水混合群落;iv东海近岸混合水群落;v东海外陆架高温高盐群落。各群落的种类组成及地理分布存在一定的季节差异。
The Yellow Sea （YS） and the East China Sea （ECS） are typical mid-latitude marginal seas of the northwest Pacific Ocean, and contain the highly productive shelf ecosystems. It＇s important to learn their zooplankton species distributions and community structures in these areas. In autumn 2000 and spring 2001, two cruises were carried out by R/V “Beidou” and covered extensively most of the continental shelf area of YS and ECS. Zooplankton samples were collected by means of an 80 cm diameter plankton net with mesh size of 500 μm, from 77 stations in spring and 71 stations in autumn. After being collected, all samples were preserved in 5% neutral formalin seawater solution, identified and counted under the dissecting microscope in the lab. Number of species was converted into abundance as individuals per square meter （ind/m^2） for each station. Based on the data of these cruises, zooplankton species composition and community classifications were analyzed using multivariate analyses, such as cluster analysis and metric multidimensional sealing analysis. Prior to numerical analyses, the species occurring in less than 2 stations were neglected, and original abundance was transformed by log10（x＋1） to scale down the scores of abundant species. Cluster analyses were performed using Ward＇s minimum variance method. Stations were grouped according to the Bray-Curtis similarity matrix calculated based on species abundance compositions of each station. Based on the same dissimilarity matrix, stations were plotted on 2-dimensional maps by metric multidimensional scaling （MDS） methods to verify the cluster analyses. Based on the results, total 210 species with occurrence 〉2 were identified. There were 112 common species to occur in both of seasons. The most common species in autumn were Sagitta nagae, Calanus sinicus and Sagitta enjqata, Euchaeta concinna; in spring were C. sinicus, Sagitta crassa, S. nagae, Paracalanus parvus and Euphausia pacifica, they all occurred in more than 75% stations investigated. In autumn, the average abundance was 6018ind/m^2, and the most abundant species were C. sinicus, S. nagae and Paracalanus aculeatus. In spring, the average abundance was 9271 ind/m^2, and the most abundant species was C. sinicus, which accounted for 87% of total abundance. Cluster and MDS analysis showed in the ECS and YS, five communities can be distinguished： （i） Yellow Sea Neritic Community with representative species of Labidocera euchaeta, Centropages mcmurrichi; （ii） the Yellow Sea Central Community with representative species of Themisto gracilipes; （iii） the Yellow Sea and East China Sea Mixed Water Community; （iv） the East China Sea Inshore Mixed Water Community （v） the East China Sea Shelf Mixed Water Community with representative species Rhincalanus cornutus and Pterosagitta draco. Communities classification results were similar with previous works in general, except the （iii） and （iv） communities. The two communities were both composed of species belonging to diverse ecotypes and located in the zone where various waters meet. According to Chen （1985）, they cannot be defined to be a strictly independent community owing to their indistinct habitants eeotypes. But in terms of their representative species compositions, （iii） community were dominant with temperate species and （iv） community had more wide-distributed warm species. It would be useful to distinguish these two groups from each other for facilitate the study of the seasonal variations on zooplankton composition and water masses configuration.
出处
《生态学报》
CAS
CSCD
北大核心
2005年第7期1531-1540,共10页
Acta Ecologica Sinica
基金
国家重点基础研究发展资助项目(G1999043707)
国家自然科学基金重大研究资助项目(30490233)
黄海水产研究所博士后基金资助项目~~
关键词
浮游动物
群落
多元分析
东海
黄海
zooplankton
community
multivariate analysis
East China Sea, Yellow Sea
