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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. [ 1 ] [ 2 ] Eutrophication may occur naturally or as a result of human actions.
Nutrient pollution, a form of water pollution, refers to contamination by excessive inputs of nutrients.It is a primary cause of eutrophication of surface waters (lakes, rivers and coastal waters), in which excess nutrients, usually nitrogen or phosphorus, stimulate algal growth. [1]
Carlson's index was proposed by Robert Carlson in his 1977 seminal paper, "A trophic state index for lakes". [3] It is one of the more commonly used trophic indices and is the trophic index used by the United States Environmental Protection Agency. [2]
The opposite effect is known as eutrophication or nutrient pollution. [6] Both depletion and eutrophication lead to shifts in biodiversity and species abundance (usually a decline). [7] The effects are bidirectional in that a shift in species composition in a habitat may also lead to shift in the nutrient composition. [8]
The process of the oversupply of nutrients leading to algae growth and oxygen depletion is called eutrophication. Algal and bacterial blooms have persistently contributed to mass extinctions driven by global warming in the geologic past, such as during the end-Permian extinction driven by Siberian Traps volcanism and the biotic recovery ...
Lake 226 was specifically studied over a four-year period, from 1973–1977 to test eutrophication. [5] Lake 226 itself is a 16.2 ha double basin lake located on highly metamorphosed granite known as Precambrian granite. [6] The depth of the lake was measured in 1994 to be 14.7 m for the northeast basin and 11.6 m for the southeast basin. [7]
The Environmental Working Group gives products such as Easy-Off a failing grade because of the harsh ingredients. Try this instead: Apply a paste made with baking soda and water, then let it sit ...
1-in-100 flood – a flood with 1 in 100 chance of occurring in any given year (used as a safety requirement for the construction industry.); 20/30/10 standard - 20 mg/L Biochemical Oxygen Demand (BOD), 30 mg/L Suspended Solids (SS), 10 units of E. coli: the water quality standard for greywater use in toilets, laundry and surface irrigation.
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