基于生态位理论的浮游动物时空群落分布特征及测度

Spatial and temporal community distribution characteristics of theand data measurement of zooplankton based on niche theory

通过对长江口及其邻近水域理化参数的分析表明,缺氧区与邻近海域浮游动物群落结构存在差异。长江口及其海域主要受长江、钱塘江、台湾暖流及江浙沿海水系的影响。且水体中硝酸盐、磷酸盐和硅酸盐从近岸到大陆架外层普遍呈下降趋势。夏季溶解氧浓度最低,长江口下游在夏季形成低氧带。由此,浮游动物的优势种具有明显的季节性演替,且得到浮游动物数量和生物量存在显著的时空变化。

The physicochemical parameters of changjiang Estuary and its adjacent waters were analyzed in this paper,and the results showed that there were differences in zooplankton community structure between the anoxic area and the adjacent waters.The Yangtze Estuary and its sea areas are mainly affected by the Yangtze River,Qiantang River,Taiwan Warm current and The Coastal water systems of Jiangsu and Zhejiang.And the nitrate,phosphate and silicate in the water from the near shore to the outer continental shelf generally show a downward trend.The concentration of dissolved oxygen is the lowest in summer,and the lower reaches of Yangtze Estuary form hypoxia zone in summer.Thus,the dominant species of zooplankton had obvious seasonal succession,and there were significant spatiotemporal changes in zooplankton quantity and biomass.