Abstract: The community structure of crustacean zooplanktons in three lakes (Junshan, Qingshan and Yaohu) in Nanchang, Jiangxi Province was investigated from March to August 2016. The results showed that 14 species of crustacean zooplanktons were identified in the three lakes, eight species out of which belonging to Cladocera and six species belonging to Copepoda. The density of crustacean zooplankton in Lake Junshan, Lake Qingshan and Lake Yaohu ranged 0.8-24.9, 0.3-18.7, and 5.9-47.9 ind·L^-1, respectively. The density of crustacean zooplanktons in Lake Yaohu was significantly higher than that in Lake Junshan (P=0.003) and Lake Qingshan (P<0.001). The eutrophic species,Diaphanosoma sp.,Moina micrura, and Bosminasp., were the dominant ones in the three lakes in summer, whereasDaphnia galeatawas the dominantspecies in Lake Junshan in spring. Results from redundancy analysis showed that water temperature, chlorophylla, and pH determined the community structure of crustacean zooplanktons in the three lakes. In addition, the community structure of crustacean zooplanktons in Lake Qingshan and Lake Yaohu located on the outskirts of the city were closely related to nitrogen and phosphorus concentrations.

Key words: forest management, growth, mortality, broadleaved-Korean pine mixed forest., neighborhood competition