Drainage Ratio Controls Phytoplankton Abundance in Urban Lakes

Urban lakes located in densely populated regions are highly vulnerable freshwater ecosystems compared to rural areas due intense anthropogenic activities. However, the impacts of intrinsic lake morphometry on water quality urban remain unclear. In present study, 14 and underlying factors associated with such were explored Wuhan City, China. Of these surveyed lakes, 92.9% eutrophic or hypereutrophic; phytoplankton biomass ranged between 3.2 62.0 mg/L was positively correlated drainage ratio values (catchment area/lake area) during bloom season. These results consistent fact that small a large watershed area generally exhibit high levels areal nutrient accumulation rise ratio, supporting growth. There no significant differences diversity among (p > 0.05), remaining stable at low Shannon index 1.9–2.9, which is possibly eutrophication pressure similar local climatic conditions across relatively limited study area. Overall, this will provide valuable foundation for future efforts improve management lakes.