Eutrophication can be caused by a variety of sources, including agricultural runoff, industrial wastewater, and municipal sewage. All of these sources can contribute to the enrichment of a body of water with nutrients, which can lead to eutrophication.

Eutrophication can have a number of negative ecological impacts, including algal blooms, fish kills, and oxygen depletion. Algal blooms can block sunlight from reaching underwater plants, which can lead to a decrease in oxygen levels. Fish kills can occur when oxygen levels become too low for fish to survive. Oxygen depletion can also lead to the release of harmful toxins from sediments.

There are a number of ways to prevent eutrophication, including reducing the use of fertilizers, treating wastewater before it is discharged into waterways, and implementing conservation practices on farms. All of these measures can help to reduce the amount of nutrients that enter waterways, which can help to prevent eutrophication.

Oligotrophication is the process by which nutrients are removed from a body of water. This can occur naturally through processes such as sedimentation and denitrification, or it can be accelerated through human intervention, such as the use of constructed wetlands.

Nitrification is the process by which nitrogen is converted from organic matter into a form that can be used by plants. This process is carried out by bacteria that live in soil and water.

Denitrification is the process by which nitrogen is converted from a form that can be used by plants into a form that cannot be used by plants. This process is carried out by bacteria that live in soil and water.

Assimilation is the process by which plants take up nutrients from the soil or water. This process is essential for plant growth.

Mineralization is the process by which organic matter is broken down into simpler compounds. This process is carried out by bacteria and fungi.

Carbon is not a nutrient that can cause eutrophication. Nitrogen and phosphorus are the primary nutrients that cause eutrophication.

Increased biodiversity is not a consequence of eutrophication. Eutrophication typically leads to a decrease in biodiversity.

Atmospheric deposition is not a source of nitrogen pollution. Agricultural runoff, industrial wastewater, and municipal sewage are all sources of nitrogen pollution.

Natural weathering is not a source of phosphorus pollution. Agricultural runoff, industrial wastewater, and municipal sewage are all sources of phosphorus pollution.

Increasing the use of pesticides is not a method for preventing eutrophication. Reducing the use of fertilizers, treating wastewater before it is discharged into waterways, and implementing conservation practices on farms are all methods for preventing eutrophication.

Increased biodiversity is not a consequence of oxygen depletion. Oxygen depletion typically leads to a decrease in biodiversity.

Introducing exotic species is not a method for restoring a eutrophic lake. Reducing the input of nutrients, dredging the lake, and adding oxygen to the lake are all methods for restoring a eutrophic lake.