Thorough mixing of oxygen and nutrients within lakes in temperate regions occurs in
A) winter and summer.
B) winter and spring.
C) spring and summer.
D) spring and autumn.
E) summer and autumn.

Question

Quizplus · Accepted Answer

Thorough mixing of oxygen and nutrients within lakes in temperate regions occurs in spring and autumn when the surface waters cool and become denser, causing them to sink and mix with deeper waters. This process, known as turnover or stratification, is important for the health of the lake ecosystem as it brings oxygen and nutrients to the lower depths where they are needed by aquatic organisms.

Thorough Mixing of Oxygen and Nutrients Within Lakes in Temperate