Study on Characteristics of Phytoplankton Community and its Influencing Factors in the Early Stage of an Artificial Lake
To investigate the early phytoplankton and the potential risks of eutrophication in an artificial lake,13 sampling points were set up in the lake area on October 30,2022.The phytoplankton community characteristics and their driving factors were analyzed using canonical correspondence analysis.The results showed that a total of 73 species of phytoplankton were identified,belonging to 8 phyla,33 families,and 58 genera.The diatom and green algae phyla had the most species,with 25 and 26 species respectively.In terms of cell density,the cyanobacteria,cryptophyta,and green algae were dominant(ranging from 7.7×10 5～6.7×10 6 cells/L,1.7×10 5～3.7×10 6 cells/L,0.5×10 5～3.2×10 6 cells/L,respectively),while in terms of biomass,the cryptophyta and diatom phyla were dominant(ranging from 0.92 to 5.52 mg/L and 0.42 to 1.39 mg/L,respectively).The dominant species were Merismopedia sp.and Leptolyngbya sp.from cyanobacteria,Melosira sp.from diatoms,Coelastrum sp.from green algae,and Chroomonas acuta and Cryptomonas sp.from cryptophyta.There were significant differences in community composition,cell density,and biomass among different sampling points.Canonical correspondence analysis indicated that turbidity(NTU),total organic carbon(TOC),dissolved oxygen(DO),and pH were significant environmental factors affecting the distribution characteristics of phytoplankton.
NETL
NSTL
万方数据
