金溪水质变化及浮游植物的时空变化研究

AbstractIn this study,the total nitrogen,nitrate nitrogen,ammonia nitrogen,total phosphorus,chlorophyll a and other indicators in jinxi were measured in autumn and winter,andthe water quality was tested.The phytoplankton community structure in jinxi was studied,and the relationship between phytoplankton and environmental factors was analyzed.The results were as follows:the concentration of chlorophyll a in phytoplankton varied from 1.92 to 54.15 g/L.The mean chlorophyll a concentration was 17.82+20.46 g/L in autumn and 8.8945.49 g/L in winter.There were temporal and spatiaI differences in the nutritional status of each site in autumn and winter.PH varies between 6.68 and 8.67,which is slightly alkaline on the whole.A total of 29 genera and 29 species of 6 groups of phytoplankton were identified in autumn and winter,anddiatomophyta,chlorophyta and cyanophyta accounted for a large proportion.The community structure was diatom-green algae type.our dominant species were found:microcystis,cryptomychlorella,cryptomychlorella and chlorella.Chlorophyll a waspositively correlated with abundance,biomass,pH and dissolved oxygen.This study can provide reference for the study of similar water ecological environment.Keywords:Water quality testing;Phytoplankton;Environmental factors;Gold creek