2014年黄骅港海域浮游动物群落结构季节变化及其影响因素研究

为了解黄骅港海域浮游动物群落结构的季节变化特征及其与环境因子的相关关系,分别于2014年2月(冬季)、5月(春季)、8月(夏季)和11月(秋季)对该海域进行4个航次的浮游动物和环境因子调查,采用优势度指数、物种多样性和聚类分析等方法分析该海域浮游动物的群落结构特征及其季节变化,采用冗余分析探究引起浮游动物群落结构变动的...

Seasonal variation of zooplankton community structure and its influencing factors in waters adjacent to the Huanghua port, Bohai in 2014

To understand the temporal and spatial variation characteristics of zooplankton community structure as well as its relationship with environmental factors in waters adjacent to the Huanghua port, four surveys including 15 stations in February (winter), May (spring) and August (summer) and 12 stations in November (autumn) were carried out, respectively, in 2014. The dominant index (Y), species diversity and cluster analysis were used to analyze the characteristics of zooplankton community structure and its seasonal changes, while redundancy analysis (RDA) was used to analyze the environmental factors, which caused the changes of zooplankton community structure. These results showed: a total of 10 categories and 64 species of zooplankton were identified, including 8 categories and 41 species in spring, 7 categories and 35 species in summer, 8 categories and 23 species in autumn and 5 categories and 12 species in winter, respectively. Additionally, Cnidaria and Copepoda were the dominant groups among these species. Meanwhile, the zooplankton community presented seasonal succession phenomenon, including the only dominant species of Noctiluca in autumn but various species of zooplankton coexisting in other three seasons. The species diversity indexes of zooplankton in four seasons showed a trend of summer > spring > autumn > winter, which was slightly different from the number of dominant species in each season. Cluster analysis showed that zooplankton community structure could be significantly divided into four groups, which was closely related to the seasonal division, at 35% similarity level. The results of RDA analysis showed that different responded differently to environmental factors including temperature, salinity and nutrients, which were the main factors causing the seasonal changes of zooplankton community. Moreover, the dissolved oxygen and phosphate in winter, nitrogen and phosphorus in spring, temperature, salinity, nitrogen as well as phosphorus in summer and autumn were also the factors that influence the zooplankton community in certain season.