Question

What effect can fertilizer runoff have on an aquatic ecosystem?

Answer 1

Fertilizer runoff has a negative impact on water supplies by an increased of plant growth leading to a decrease in fish populations. Excess algae growth results in oxygen depletion which leads to an increase in the amount of nitrate-nitrogen in drinking water and a decrease in fish populations.

Step-by-step explanation:

Answer 2

increased plant growth leading to a decrease in fish populations.

Explanation: I just did the test..