Community structure of zooplankton and water quality assessment of Jialing River in Sichuan

For understanding the water quality state of Jialing River in Sichuan, the community structure characteristics of zooplankton were investigated in both dry and rainy seasons. By Shannon-wiener diversity index, Margalef richness index and Pielou evenness index and the combination of dominant species in the indicator species in the section was discussed. Results show that The zooplankton in this section consist of 4 classes, 9 orders, 21 families, 30 genera, 62 species, belonging to Protozoa, Pseudocoeloma and Arthropoda respectively. The average number is 2854.4 ind/ L, the average biomass is 2.331 mg/ L. Evaluation results determine the water quality in Sichuan of Jialing River belong to β-mesosaprobic. It was suggested that the further work departments should be carried out to strengthen the necessary consolidate management and ecological repair.