Turnover of water in temperate lakes during the spring and fall is caused by which of the following?
A) warm, less dense water layered at the top
B) cold, more dense water layered at the bottom
C) a distinct thermocline between less dense, warm water and cold, dense water
D) the changes in the density of water as seasonal temperatures change

Question

Quizplus · Accepted Answer

The turnover of water in temperate lakes during spring and fall is primarily driven by changes in the density of water as seasonal temperatures change. In spring and fall, the temperature of surface water becomes similar to that of the bottom water, reducing the density difference and allowing the water to mix. This process redistributes nutrients and oxygen throughout the lake.

Turnover of Water in Temperate Lakes During the Spring and Fall