Changes of Aquatic Ecosystem Status in Chaohu Lake Catchment
Based on the survey of biological resources in Chaohu lake catchment,this study analyzed the changes of biological environment in water quality,phytoplankton,algae,benthic animals and large aquatic plants in 2013 and 2023.The results showed that the whole water quality of Chaohu river catchment has improved obviously after ten years of implementation of the lake treatment project,and the improvement of water quality of Nanfei river and Shiwuli river is the most obvious.The density of cyanophyta decreased from 33.33%to 2.76%,and the density of diatomata and chrysophyta increased from 11.43%and 0.83%to 26.62%and 1.76%,respectively.The diversity of benthic animals increased,and the density of pollution-tolerant species decreased.The diversity index of organic diatoms showed an increasing trend in general,and the dominant groups were still Bivalvina,Acervina and Monocervina.The composition of dominant species in large aquatic plant community displayed a small change.This study provides data support for the scientific evaluation of ecological restoration effect of landscape engineering and the formulation of ecological restoration plan.
Chaohu lake catchmentAquatic ecosystemChangeDiversity
NETL
NSTL
万方数据
