The Relationship between Zooplankton Diversity and Environmental Factors in the Coastal Waters of Zhoushan in Autumn

HE Zhou-yang;XU Yong-jiu;YU Cun-gen;Fisheries School of Zhejiang Ocean Univercity;

Zhoushan coastal waters;;zooplankton;;diversity index;;environmental factors

In November (Autumn) 2015 in the coastal waters of Zhoushan and adjacent (29.0°-31.0° N,121.5°-123.0° E),we carried out a comprehensive survey of marine ecosystems,the species composition,quantity distribution,evenness and diversity of zooplankton in the sea area were analyzed by using plankton samples collected from the shallow water,at the same time,the relationship between the quantitative distribu-tion of zooplankton and environmental factors in Zhoushan coastal waters was studied.According to the results,83 species of zooplankton (including planktonic larvae) were identified in the area,including the largest number of species of copepods,a total of 30 species,dominant species of a total of 20 species,which are Microsetella norvegica,Paracalanus parvus,Oithona similis,etc.The abundance of planktonic animal range is 5.19-3 774.54 ind/m~3 in the survey area,its spatial distribution is characterized by high offshore and low nearshore.The average temperature and the average salinity of the whole water layer of the investigation area also showed a relatively high offshore and relatively low coastal trend.In the eastern part of the island of Zhoushan,due to the effect of the Taiwan Warm Current,the temperature and salinity were high,the community structure was complex,and zooplankton diversity index was high.