Spatial distribution of phytoplankton in Lake Yangcheng during spring/summer and its relationship with environmental factors
The primary objective was to establish the seasonal and spatial distributions of environmental parameters and their relationships with phytoplankton biomass(measured as chlorophyll a concentration,chl a)in Lake Yangcheng.Samples were collected during spring(March)and summer(August)in 2015,covering the west,middle and east of the lake.The result showed that environmental parameters and phytoplankton community structure varied significantly at seasonal scale(all P values<0.05).The significant difference in community structure was also observed between the west and east in summer(P=0.024).Regarding chl a,no significant difference was observed among the three parts in spring,although the mean value was relatively high in the west.However,in summer,the chl a was significantly higher in the east than that in the west.Stepwise linear regression analysis showed that nitrite and dissolved oxygen were the major parameters that affect chl a in spring,and the key parameters for chl a became conductivity,orthophosphate,and water temperature in summer.Comparison with the data in spring from 1994 and 2009,total nitrogen and permanganate index both increased in 2009 and decreased in 2015,and chl a in 2015 was also lower than that in 2009.However,total phosphorus increased from 1994 to 2015.Local manager should pay more attention to the monitoring of phytoplankton in the eastern part,especially in summer,as well as phosphorus of Lake Yangcheng.
Lake Yangchengphytoplanktonseasonal variationspatial distributioninfluencing factors
万方数据
维普
