Plankton Community Structure and Water Quality Evaluation in Tunliu Reservoir
In order to better understand the characteristics of plankton community structure and water ecological environment in Tunliu Reservoir,a comprehensive survey of plankton and water quality physicochemical factors was carried out in Tunliu Reservoir in January and June 2022.During the investigation period,a total of 8 phyla and 91 genera of phytoplankton were detected.The diversity index and evenness index in January were 2.671 and 0.43,and the diversity index and evenness index in June were 2.157 and 0.35.A total of 4 categories and 50 genera of planktonic animals were detected.Rotifers were the most genera and copepods were the least.The results of plankton diversity assessment showed that Tunliu Reservoir belonged to the medium pollution type between mesotrophic and eutrophic during the survey period.The comprehensive nutrition index method was used to evaluate and analyze the water quality.The results showed that the comprehensive water quality of each sampling point did not meet the target requirements of class Ⅱ water in functional areas,and the water quality in June was worse than that in January.The comprehensive nutrition index method was used to evaluate and analyze the water quality.The evaluation results of single factor water quality index method showed that the main pollutant index factors were total nitrogen and ammonium nitrogen,followed by total phosphorus and chemical oxygen consumption.This study revealed the plankton community structure of Tunliu Reservoir,evaluated its water quality,analyzed and identified the main physicochemical factors affecting water quality,and provided theoretical reference for improving water environment and developing ecological fishery in Tunliu Reservoir.
PlanktonCommunity structureDiversity analysisMark index method(MIM)Water quality assessment
NETL
NSTL
万方数据
