| Impact ID | 7159 |
| Impact Type | Environmental Water Quality |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Stratiotes aloides exerted a negative influence upon contiguous populations of phytoplankton in Sweden and in Poland. A considerable decline in planktonic chlorophyll was accompanied by decreases in electrolytic conductivity, carbonate alkalinity and contents of calcium, potassium and sodium. Competition for essential nutrients together with changes in the ionic composition of the water seem to be a likely explanation for the decline in phytoplankton. |
| Reference | 42137 |
| Cost | |
| Location | Lake Ravalen, Sweden and Lake Warnolty, Poland |