中国水产科学2017，Vol.24Issue(5)：922-930,9.DOI:10.3724/SP.J.1118.2017.17076
黄河口及其邻近水域浮游动物群落结构特征及其季节变化
Characteristics of zooplankton community structure and its seasonal variation in the Yellow River estuary and its adjacent waters
摘要
Abstract
Zooplankton species play a crucial role in the pelagic food chain of coastal ecosystems and may reflect changes to marine environments.Therefore,community structure and seasonal variation in zooplankton assemblages are important for understanding ecosystem structure.In recent decades,anthropogenic activities have caused considerable changes to the environment of the Yellow River estuary and its adjacent waters.To ascertain how the present environment has influenced seasonal changes in zooplankton community structure,data on species composition,abundance,dominant species,and species diversity were collected during August 2013-May 2014 in the Yellow River estuary and its adjacent waters.Dominant species were selected based on a dominance(Y)greater than 0.02.Between-season species fluctuations were described using seasonal replacement rate(A).Species diversity in zooplankton communities were measured with the following indices:Margalef species richness(D),Shannon-Wiener diversity(H'),Pielou evenness (J'),and K-dominance curves.We identified 30 zooplankton species with 13 types of pelagic larvae,representing six phyla:Protozoa (one species),Chaetognatha (one species),Urochordata (one species),Ctenophora (one species),Coelenterata (eight species),and Crustacea (18 species).Seasonal replacement rates were 64.1％ (summer to autumn),71.4％ (autumn to winter),41.2％ (winter to spring),and 70.6％ (spring to summer),revealing obvious seasonality in species composition.Average zooplankton abundance was (2115.64±4143.70) ind/m3.Excluding Noctiluca scintillans,the average was (95.93±116.27) ind/m3,with Arthropoda accounting for 71.43％.Abundance was highest in spring (May),followed by winter (February),autumn (October),and finally,summer (August).Sagitta crassa and Copepoda such as Acartia bipinnata and Paracalanus parvus were the main dominant species,whereas N.scintillans was highly dominant in spring,exhibiting large blooms.All four species diversity indices were consistent in seasonal variation,being larger in summer and autumn than in winter and spring.Overall,zooplankton community structure was characterized by seasonal fluctuation.Copepoda and pelagic larvae were the dominant groups,with profound effect on variation in abundance and species diversity.Compared to previous research,zooplankton species composition and dominant species did not change significantly in the Yellow River estuary and its adjacent waters.The big blooms of N.scintillans were at least partially due to water organic pollution.Consequently,its increasing dominance underscores serious water eutrophication in the Yellow River estuary.关键词
黄河口/浮游动物/种类组成/优势种/种类多样性Key words
Yellow River estuary/zooplankton/species composition/dominant species/species diversity分类
农业科技引用本文复制引用
刘晓慧,徐宾铎,张崇良,薛莹,任一平,纪毓鹏..黄河口及其邻近水域浮游动物群落结构特征及其季节变化[J].中国水产科学,2017,24(5):922-930,9.基金项目
公益性行业(农业)科研专项经费项目(201303050). （农业）
