From April to December 2018, zooplankton and water quality were monitored in the Daning water storage reservoir of the South-to-North Water Transfer Project. The dominance of plankton was calculated and dominant speci...From April to December 2018, zooplankton and water quality were monitored in the Daning water storage reservoir of the South-to-North Water Transfer Project. The dominance of plankton was calculated and dominant species of plankton were analyzed. The relationship between dominant species and water environment factors was discussed by canonical correspondence analysis. The results showed that the Daning Water Storage Reservoir identified 12 species of dominant species of phytoplankton in 5 phyla, most of which were common species of freshwater phytoplankton, and there were also eutrophication indicator species, and 10 species of dominant species (genus) of metazoan zooplankton were identified. Four water environment factors affecting dominant species of phytoplankton were screened out, which are chloride, total nitrogen, total phosphorus and nitrate nitrogen respectively. The five water environment factors that affect the dominant species of zooplankton are sulfate, chloride, nitrate nitrogen, water temperature and pH respectively. The temporal distribution of dominant species of plankton in the reservoir is quite different. Diatom and Xanthomonas are mainly affected by the concentration of nitrate in water, while Chlorophyta is mainly affected by chloride and total phosphorus except Scenedesmus obliquus, and Cyanophyta is affected by these four water environment factors. The pH values of Brachionus puledalis, Brachionus angularis, Brachionus plicatilis and Arthropoda are significantly affected by the pH values, while nitrate nitrogen and sulfate are simultaneously affected. Water temperature affects Daphnia magna, Brachionus polycephalus and Brachionus breviscapus, while other metazooplankton are not significantly affected by sulfate, nitrate nitrogen, chloride, water temperature and pH values.展开更多
文摘From April to December 2018, zooplankton and water quality were monitored in the Daning water storage reservoir of the South-to-North Water Transfer Project. The dominance of plankton was calculated and dominant species of plankton were analyzed. The relationship between dominant species and water environment factors was discussed by canonical correspondence analysis. The results showed that the Daning Water Storage Reservoir identified 12 species of dominant species of phytoplankton in 5 phyla, most of which were common species of freshwater phytoplankton, and there were also eutrophication indicator species, and 10 species of dominant species (genus) of metazoan zooplankton were identified. Four water environment factors affecting dominant species of phytoplankton were screened out, which are chloride, total nitrogen, total phosphorus and nitrate nitrogen respectively. The five water environment factors that affect the dominant species of zooplankton are sulfate, chloride, nitrate nitrogen, water temperature and pH respectively. The temporal distribution of dominant species of plankton in the reservoir is quite different. Diatom and Xanthomonas are mainly affected by the concentration of nitrate in water, while Chlorophyta is mainly affected by chloride and total phosphorus except Scenedesmus obliquus, and Cyanophyta is affected by these four water environment factors. The pH values of Brachionus puledalis, Brachionus angularis, Brachionus plicatilis and Arthropoda are significantly affected by the pH values, while nitrate nitrogen and sulfate are simultaneously affected. Water temperature affects Daphnia magna, Brachionus polycephalus and Brachionus breviscapus, while other metazooplankton are not significantly affected by sulfate, nitrate nitrogen, chloride, water temperature and pH values.
