春季南黄海近岸海域浮游动物群落特征

为研究南黄海春季浮游动物群落特征及变化规律，利用2017年4月至6月在南黄海近岸水域获取的WP2型浮游生物网采样品及相关调查资料，分析了浮游动物的种类组成、密度、优势种、生物多样性及其与环境因子的相关性。研究海域共记录浮游动物成体41种（含未定种），浮游幼虫22类。桡足类、水螅水母和浮游幼虫是浮游动物种类数最多的类群。春季，胶东半岛沿岸海域、海州湾毗邻海域和苏北沿岸海域浮游动物群落结构在时间和空间上的动态变化存在明显差异。温度在时间和空间上的不均匀变化是造成上述差异的重要原因。胶东半岛沿岸海域受冷水团影响，浮游动物群落的变化趋势与其他海域存在较大不同。小拟哲水蚤（Paracalanus parvus）是海域最占优势的浮游动物种类，对浮游动物总密度及多样性指数有较大影响。生物多样性分析显示，海州湾毗邻海域浮游动物多样性最高，胶东半岛沿岸海域次之，苏北沿岸海域最低。

Community characteristics of zooplankton in the South Yellow Sea coastal water in spring

In order to study the community characteristics and variation of zooplankton in the coastal water of South Yellow Sea in spring, we analyzed the composition, abundance, dominant species, biodiversity of zooplankton and the correlation between zooplankton and environmental factors based on samples collected by WP2 plankton net in 3 surveys from April to June, 2017. 41 zooplankton taxa and 22 pelagic larvae were identified. Copepods, hydromedusae and pelagic larvae comprised the largest number of species. The variation of zooplankton community in the coastal waters of Jiaodong peninsula, Haizhou bay and the Northern Jiangsu were significantly different in spatial and temporal. The uneven temporal-spatial temperature change was the main reason for the difference. Because of the cold-water mass, the change trend of zooplankton community in the coastal water of Jiaodong peninsula varied remarkablyfrom the other two areas. Paracalanus parvus has a high dominance index in investigated areas, which also had a great impact on the total density and diversity index of zooplankton. The Shannon-Weiner index and k-dominance curve show that the Haizhou bay has the highest zooplankton diversity, followed by the coastal waters of Jiaodong peninsula, and the Northern Jiangsu.