Community Structure of Zooplankton and Water Quality Assessment of Jialing River in Nan Chong

For understanding the water quality state of Jialing River in Nan Chong, 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 a total of 45 species were collected and identified, the kinds of zooplankton are mainly composed of Protozoa, 53% of the total, 9 species of Rotifer, 7 species of Cladocera, 5 species of Copepoda. The average number is 2740.5 ind/ L, the average biomass is 2.2654 mg/ L. Evaluation results determine the water quality in Nanchong city of Jialing River belong to the moderate pollution. It was suggested that the further work departments should be carried out to strengthen the necessary consolidate management and ecological repair.