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Eutrophication is a form of water pollution. It occurs when excessive fertilizers run  into lakes and rivers. It encourages the growth of algae.
It blocks light from reaching the water. It prevents aquatic plants photosynthesizing . So this blocks oxygen in Water to animals.

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1. Species diversity decreases and the dominant biota changes

2. Plant and animal biomass increase

3. Turbidity increases

4. Rate of sedimentation increases, shortening the lifespan of the lake

5. Anoxic conditions may develop

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Eutrophication can have serious effects, like algal blooms that block light from getting into the water and harm the plants and animals that need it. If there's enough overgrowth of algae, it can prevent oxygen from getting into the water, making it hypoxic and creating a dead zone where no organisms can survive.

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the process by , which the surrounding  watershed enriches bodies of water with nutrients that simulate excessive plant growth is eutrophication. although eutrophication is a natural process , it can be sped up with addition of nutrients, such as fertilizers that contain nitrogen and phosphorus . other major sources of nutrients that concentrate in lakes are animal wastes and phosphate detergents.

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LINA AL MARRI    -                             the causes of eutrophication

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LINA AL MARRI    -                             the causes of eutrophication

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natural run-off of nutrients from the soil and the weathering of rocks

run-off of inorganic fertiliser (containing nitrates and phosphates)

run-off of manure from farms (containing nitrates, phosphates and ammonia)

run-off from erosion (following mining, construction work or poor land use)

discharge of detergents (containing phosphates)

discharge of partially treated or untreated sewage (containing nitrates and phosphates)

EFFECTS OF EUTROPHICATION:

increase in plant and animal biomass

increase in growth of rooted plants, e.g. reeds

increase in turbidity (cloudiness) of water

increase in rate of sedimentation

development of anoxic conditions (low oxygen levels)

decrease in species diversity

change in dominant biota (e.g. carp replace trout and blue-green algae replace normal algae) and an

increase in the frequency of algal blooms.

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richness of nutrients in a lake or other body of water.

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1. Species diversity decreases and the dominant biota changes

2. Plant and animal biomass increase

3. Turbidity increases

4. Rate of sedimentation increases, shortening the lifespan of the lake

5. Anoxic conditions may develop

Because of the high concentration of organisms in a eutrophic system, there is often a lot of competition for resources and predator pressure. This high degree of competition and the sometimes-high chemical or physical stress make high the struggle for survival in eutrophic systems. As a result the diversity of organisms is lower in eutrophic than in oligotrophic systems.

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Eutrophication can have serious, long-term effects. The most notable effect of eutrophication is algal blooms. When a bloom occurs, the stream, river, lake or ocean becomes covered with algae, which is usually bright green. In addition to looking pretty ugly, it also blocks light from reaching the water. This prevents the aquatic plants from photosynthesizing, a process which provides oxygen in the water to animals that need it, like fish and crabs.

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like algal blooms that block light from getting into the water and harm the plants and animals that need it. If there's enough overgrowth of algae, it can prevent oxygen from getting into the water, making it hypoxic and creating a dead zone where no organisms can survive.

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-diversity of species decreases
-biomass of plants and animals increase
-turbidity increases
-lifespan of lake decreases
-anoxic conditions may develop

# data[].attributes.body
Eutrophication can have serious effects, like algal blooms that block light from getting into the water and harm the plants and animals that need it. If there's enough overgrowth of algae, it can prevent oxygen from getting into the water, making it hypoxic and creating a dead zone where no organisms can survive.