A moderate-size lake in the American Midwest suddenly has succumbed to an algal bloom.What is the likely cause of eutrophication in this lake?
A)increased solar radiation during the summer season
B)the introduction of non-native tertiary consumer fish
C)excessive farm fertilizer runoff during a heavy rainfall
D)accidental introduction of a prolific culture of algae
E)iron dust blowing into the lake from area factories

Question

Quizplus · Accepted Answer

Excessive farm fertilizer runoff during a heavy rainfall can cause eutrophication by introducing high levels of nutrients, especially nitrogen and phosphorus, into the lake. This excess nutrients can accelerate the growth of algae, leading to an algal bloom.

A Moderate-Size Lake in the American Midwest Suddenly Has Succumbed