Comprehensive analysis and evaluation of habitat quality of Songjiang perch resource reserve in Jinghai Bay
Jinghai Bay Songjiang Perch Conservation Area have high economic and ecological values.Grasping the quality of its ecological environment is of a great significance.Based on the monitoring da-ta of nutrients,heavy metals and other environmental factors in 2017,2019 and 2020,and by using the comprehensive quality index method,we comprehensively evaluated the ecological environment quality of the sea area.The main factors affecting the water quality of the investigated sea area were analyzed through principal component analysis.The eutrophication and pollution of heavy metal were also evalu-ated.The results showed that the surface seawater quality is at a state of light pollution in 2017 and 2019;the surface seawater quality is permitting in 2020 with the value ranges from 0.80 to 1.73.The results of principal component analysis showed that COD,DIN,Cu,Cd and Zn(＞0.9)are the main environmental factors affecting the water quality of Jinghai Bay nature reserve.The organic pollution index varied between 4.68 and 12.59,indicating that the bay is severely polluted.The eutrophication level of Jinghai Bay in 2017 was at an eutrophication state.The bay was at the potential eutrophication state with nitrogen limitation in 2019 and 2020.We should actively reduce the organic pollution and eu-trophication of Jinghai Bay Reserve in future,pay attention to the heavy metals,and actively take the prevention measures.
Jinghai Baycomprehensive quality evaluationeutrophicationPrincipal component analy-sisheavy metal pollution evaluation
NETL
NSTL
万方数据
