We describe the relationships between summer average total phosphorus (TP) and the biomass of six major phytoplankton taxonomic groups from 91 north temperate lakes. Both regression and a locally weighted smoothing (LOWESS) analyses show that all groups increase with TP but over different nutrient ranges. At nutrient extremes, i.e. very low and high levels of TP, the few taxonomic groups that d...

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 hypereutro...

Based on monthly mass balances on 7–8 yr of data from 16 shallow (mean depth: 1–10 m), eutrophic, unstratified, or only temporarily stratified Danish lakes, we developed a simple empirical model relating the seasonal variation in lake total phosphorus (TP) concentrations to external loading, accumulated phosphorus in the sediment, hydraulic retention time, and water temperature. The aim was to ...

We studied nutrient uptake in relation to water chemistry, stream hydrodynamics, and ecosystem metabolism in two eutrophic lowland streams located near Berlin, Germany. Ambient nutrient uptake rates ranged from 0.180 to 12.880 g NO3-N m22 d21, from 0.035 to 0.517 g NH4-N m22 d21, and from 0.017 to 0.750 g PO4-P m22 d21. Temporal and spatial variability in nutrient uptake rates within single str...