The Biodiversity of Crustacean Zooplankton in Lake Baiyangdian
白洋淀浮游甲壳动物的生物多样性研究

Based on the crustacean zooplankton survey from April to December 2006 in Lake Baiyangdian, 19 Cladocera and 16 Copepoda were recorded, which belong to 9 family and 19 genera. The biodiversity index revealed significant seasonal variation of the crustacean diversity. The dominant Cladocera species in spring, summer and autumn-winter were Moina micrura, Bosmina longirostris, Diaphanosoma leuch, respectively. Cyclopidae strenuus was the dominant Copepoda species in winter-spring while Eucyclopinae macruroides and Thermocyclops tsihokurnsisin summer-autumn. Similarly, species diversity remained high in spring and autumn, but decreased in summer and winter. The highest dividual density was in spring, and the lowest was in winter. According to integrated biological diversity index, water quality of Baiyangdian was mesotrophication.