During which season would an ecologist expect a temperate lake to demonstrate overturns?

Question

Quizplus · Accepted Answer

In a temperate lake, the overturn occurs twice a year - in the spring and fall. In the spring, the surface waters warm up and become more buoyant, leading to stratification of the lake. In the fall, the water cools down, becoming denser and sinking to the bottom, leading to a turnover that mixes the deeper waters with the surface waters.

During Which Season Would an Ecologist Expect a Temperate Lake