赤水河河源段浮游生物群落特征OA

In order to investigate the phytoplankton diversity in the headwater section of the Chishui River,the phytoplankton and zooplankton resources in the investigated section were surveyed in March,June,September and December 2023 in quarterly intervals.A total of 210 species of phytoplankton and 61 species of zooplankton were collected in this survey.The phytoplankton had the highest number of species in the phylum Diatom,with an average density of 0.91×106 cells·L-1 and an average biomass of 0.95 mg·L-1,and the zooplankton had the highest number of species in the phylum Protozoa,with an average density of 6.19 cells·L-1 and an average biomass of 0.01 mg·L-1.Based on the biodiversity indices of the phytoplankton and the zooplankton,we judge that this surveyed area is in the state of mild or moderate pollution.Based on the results,it is concluded that the biodiversity of plankton(including phytoplankton and zooplankton)in the headwater section of the Chishui River is relatively rich.The one-year monitoring data of aquatic biological resources and the analysis can scientifically assess the aquatic ecological status of the headwaters of the Chishui River from the perspective of plankton,and provide basic data and theoretical references for the protection and management of the area.