Why are nutrients from fertilizer harmful to aquatic ecosystems? They cause an increase in fish populations. The increase in algae population reduces oxygen in the water. They can infect plants, which causes animals and humans to become sick. Fish and other organisms grow too large and can no longer live in the ecosystem.

Answers

Answer 1

Answer: The nutrients from fertilizers are harmful to aquatic ecosystems because they increase the algae population which reduces oxygen in the water. This phenomena is called an algae bloom and results in the loss of oxygen in the water. With the subsequent decline in oxygen within the water animal life is often hurt and many species can be killed. This phenomena of algae blooms and harm of the aquatic system can occur both in fresh and saltwater environments.

Answer 2

Answer:

Nutrients from fertilizers, such as nitrogen and phosphorus, can be harmful to aquatic ecosystems primarily because they promote excessive growth of algae and aquatic plants. Hence option b "The increase in algae population reduces oxygen in the water" is correct.

This excessive growth is known as eutrophication. The process unfolds as follows:

Nutrient Input: Fertilizers with nitrogen and phosphorus are often utilized in residential and agricultural settings. These nutrients may be introduced into surrounding water bodies by runoff from these locations.

Algal Blooms: Nutrients function as fertilisers for algae and aquatic plants, causing algal blooms. Algal blooms are therefore created as a result of the fast growth in the population of algae. These blooms can completely cover the water's surface, turning it green or murky.

Oxygen Depletion: The process of decomposition consumes oxygen when the algae and aquatic plants die and degrade. An higher need for oxygen results from the large amount of organic material from the deceased organisms. As a result, the amount of dissolved oxygen in the water may decrease.

To know more about eutrophication:

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