Question

what is eutrophication ? why it is harmful? whre it is found more

Answer 1

Hey..!!!
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Eutrophication (from Greek eutrophos, "well-nourished"), or hypertrophication, is when a body of water becomes overly enriched with minerals and nutrients that induce excessive growth of plants and algae.

This process may result in oxygen depletion of the water body. One example is the "bloom" or great increase of phytoplankton in a water body as a response to increased levels of nutrients. Eutrophication is almost always induced by the discharge of nitrate or phosphate-containing detergents, fertilizers.or sewageinto an aquatic system.

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Harmful effect of Eutorophication:-

Many ecological effects can arise from stimulating primary production, but there are three particularly troubling ecological impacts: decreased biodiversity, changes in species composition and dominance, and toxicity effects.

<> Increased biomass of phytoplankton

<> Toxic or inedible phytoplankton species

<> Increases in blooms of gelatinous zooplankton

<>Increased biomass of benthic and epiphyticalgae

<> Changes in macrophyte species composition and biomass

<> Decreases in water transparency (increased turbidity)

<> Colour, smell, and water treatment problems

<> Dissolved oxygen depletion

<> Increased incidences of fish kills

<> Loss of desirable fish species

<> Reductions in harvestable fish and shellfish

<>Decreases in perceived aesthetic value of the water body.

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Eutrophication. A major problem with the use of fertilisers occurs when they're washed off the land by rainwater into rivers and lakes. The resulting increase of nitrate or phosphate in the water encourages algae growth, which forms a bloom over the water surface.

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Answer 2

Answer:

Hey mate here is your answer.

Explanation:

Eutrophication is the process in which a water body becomes overly enriched with nutrients, leading to plentiful growth of simple plant life. The excessive growth (or bloom) of algae and plankton in a water body are indicators of this process. Eutrophication is considered to be a serious environmental concern since it often results in the deterioration of water quality and the depletion of dissolved oxygen in water bodies. Eutrophic waters can eventually become “dead zones” that are incapable of supporting life.

Some other important effects of this process are listed below.

Phytoplanktons grow much faster in such situations. These phytoplankton species are toxic and are inedible.

Gelatinous zooplankton blooms fast in these waters.

Increased biomass of epiphytic and benthic algae can be observed in eutrophic waters.

Significant changes arise in the species composition of macrophytes and the biomass.

The water loses its transparency and develops a bad smell and colour. The treatment of this water becomes difficult.

Depletion of dissolved oxygen in the water body.

Frequent fish kill incidents occur and many desirable fish species are removed from the water body.

The populations of shellfish and harvestable fish are lowered.

The aesthetic value of the water body diminishes significantly.