This includes a variety of different species, genetic variability among individuals within each species and a variety of ecosystems. These effects can be reflected by change in the productivity and structure of the population and community. See also acute toxicity. Humans are considered part of the system, not separate from it. The process of nutrient enrichment that causes high productivity and biomass in an aquatic ecosystem.
Eutrophication is a natural process.
Cultural eutrophication is the result of increased nutrient loading to a water body due to human activity. Oxygen depletion is a common problem in the hypolimnion of eutrophic lakes. Can also include support from municipalities and the private sectors, and highlights the action plan. These are used by the IJC to recommend new Areas of Concern and to determine if existing AOCs have been sufficiently cleaned up. If the input of a compound is higher than the output of the same compound it is an indication that the compound is accumulating in the system.