Study on the Characteristics of Phytoplankton Community and Eutrophication Status in the Lake Ulansuhai
The Lake Ulansuhai is the largest lake wetland in the Yellow River Basin and an important natural hydroecology bar-rier.In order to figure out the structure of phytoplankton community,the eutrophication status of water body and the influence of environmental factors in the Lake Ulansuhai,three sampling sites were set up in July and September 2022 to investigate and monitor the phytoplankton and water environment indexes,and to analyze the lake eutrophication status and the environmental fac-tors.The results show:(1)A total of 108 species(genera)of phytoplankton belonging to 8 phyla were identified in these two in-vestigations.Chlorophyta and Bacillariophyta were the dominant species.A total of 7 dominant species were screened,and the ad-vantages of Cyanobacteria were obvious,among which Pseudoanabaena and C.annulata were the absolute dominant species.(2)The average Shannon-Wiener diversity index was 2.15,and the water pollution degree in the center of the lake was higher than that in the south and north of the lake.(3)The lake eutrophication status was mild to moderate eutrophication.(4)The phytoplankton abundance is affected by conductivity,total phosphorus and dissolved oxygen.It is recommended to strengthen the monitoring of to-tal phosphorus and take targeted measures to further improve the hydroecological status of the Lake Ulansuhai.The study could provide references for the hydroecological protection and management of the Lake Ulansuhai.
the Lake Ulansuhaiphytoplanktonlake eutrophication statuscorrelation analysishydroecologywater environment
万方数据
维普
