Relationship between Plankton Community Structure and Environmental Factors in Ecological Culture Ponds of Black Carp Mylopharyngodon piceus-Silver Carp Hypophthalmichthys molitrix and Bighead Carp Aristichthys nobilis
GONG Jinling, LI Xuemei, HE Yongfeng, YANG Deguo, ZHU Yongjiu
Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture and Rural Affairs, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
Abstract：In order to study the relationship between plankton community structure and environmental factors in the ecological culture ponds of black carp Mylopharyngodon piceus-silver carp Hypophthalmichthys molitrix and bighead carp Aristichthys nobilis from April to October 2015, the plankton and physicochemical properties of water quality were monitored in three black carp culture ponds. The results showed that a total of 112 species of phytoplankton were detected in ecological culture ponds, including Chlorophyta (47), Euglenophyta (30) and Bacillariophyta (17) being the dominant taxonomy. The dominant species were Cyclotella comta, Chlorella vulgaris and Scenedesmus armatus. The average density and biomass of phytoplankton were 3.24×107 ind./L and 32.10 mg/L. A total of 96 species of zooplankton were detected, including 42 protozoa, 40 rotifers, 9 branchopods and 5 copepods. The dominant species were Anuraeopsis fissa, Polyarthra trigla Ehrenberg and Trichocerca pusilla, with average zooplankton density and biomass of 6.08×104 ind./L and 5.20 mg/L. The diversity index of phytoplankton and zooplankton in different months were Shannon-Wiener′s diversity index (1.8—2.5 and 2.9—4.5), species richness index (2.5—4.9 and 1.2—4.1), and species evenness index (0.51—0.69 and 1.5—2.8). In addition, the relationship between plankton community and physicochemical factors in water was discussed through Pearson correlation analysis and redundancy analysis (RDA). It was found that pH, water temperature (T), transparency (SD) and dissolved oxygen (DO) were the main environmental factors affecting the plankton community structure in the ecological culture ponds of black carp, silver carp and bighead carp. Therefore, in actual production, the composition and quantity of plankton community structure in aquaculture water can be controlled by regulating water quality, so as to improve aquaculture yield. Meanwhile, water quality management should be strengthened in the weather of high temperature and hypoxia.
龚进玲, 李学梅, 何勇凤, 杨德国, 朱永久. 青鱼—鲢、鳙生态池塘浮游生物群落结构特征及其与环境因子的关系[J]. 水产科学, 2022, 41(4): 517-526.
GONG Jinling, LI Xuemei, HE Yongfeng, YANG Deguo, ZHU Yongjiu. Relationship between Plankton Community Structure and Environmental Factors in Ecological Culture Ponds of Black Carp Mylopharyngodon piceus-Silver Carp Hypophthalmichthys molitrix and Bighead Carp Aristichthys nobilis. 水产科学, 2022, 41(4): 517-526.
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2022, Vol. 41 
