Eutrophication
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Eutrophication is a general term describing a process in which nutrients accumulate in a body of water, resulting in an increased growth of organisms that may deplete the oxygen in the water; i.e. the
Eutrophication can cause harmful algal blooms like this one in a river near Chengdu, China.
An example in Tennessee of how soil from fertilized fields can turn into runoff after a storm, creating a flux of nutrients that flow into local bodies of water such as lakes and creeks
The eutrophication of Mono Lake, which is a cyanobacteria-rich soda lake
Eutrophication is apparent as increased turbidity in the northern part of the Caspian Sea, imaged from orbit.
Trophic state index
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The Trophic State Index is a classification system designed to rate water bodies based on the amount of biological productivity they sustain. Although the term "trophic index" is commonly applied to l
Lake George, New York, an oligotrophic lake
Lake Kurtkowiec, an oligotrophic lake in the Tatra Mountains of southern Poland
Aerial view of Slapton Sands and northern part of Ley geograph.org.uk 1434412