Research on Phytoplankton Community Structure of Major Reservoirs during the Dry Season in Hainan
In order to understand the characteristics of phytoplankton communities in major reservoirs of Hainan during the dry season,a total of 11 phytoplankton samples were obtained in Songtao Reservoir,Daguangba Reservoir and Niululing Reservoir in April 2022.Results showed that 69 species(genera)of phytoplankton belonging to 7 phylum were identified in Songtao Reservoir,the dominant species were mainly composed of Coelastrum microporum.A total of 75 species(genera)belonging to 7 phylum were identified in Daguangba Reservoir,dominant species were consisted of Fragilaria crotonensis.93 species(genera)of phytoplankton belonging to 6 phylum were identified in Niululing Reservoir,and dominant species were mainly composed of Anabaena spiroides.In addition,phytoplankton abundance range of Songtao,Daguangba and Niuling reservoirs were 7.5×105 cells/L~7.7×105 cells/L,6.9×105 cells/L~8.3×105 cells/L,7.5×105 cells/L~1.8×106 cells/L respectively,and with obvious differences among the stations of reservoirs..In general,the phytoplankton uniformity index of three reservoirs were slightly lower,while the biodiversity index and richness index were generally higher,the biological species in the reservoir areas were also rich,and quality of hydroecology was clean with out.signs of pollution.