Multiple Choice
In which aquatic zone are insects most likely found?
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48. Ecology
Introduction to Aquatic Biomes
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What is the importance of turnover in temperate lakes?
A
It causes a permanent stratification of water layers.
B
It increases the salinity of the lake water.
C
It prevents the formation of ice on the lake surface.
D
It helps distribute nutrients and oxygen throughout the lake.
Verified step by step guidance1
Understand the concept of turnover in temperate lakes: Turnover refers to the mixing of water layers in a lake, typically occurring in spring and autumn. This process is driven by changes in temperature and density of the water.
Recognize the role of temperature: In temperate lakes, the surface water warms up during the summer and cools down during the autumn. As the surface water cools, it becomes denser and sinks, causing the mixing of water layers.
Identify the effects of turnover: The mixing of water layers during turnover helps distribute nutrients and oxygen throughout the lake. This is crucial for maintaining the health of aquatic ecosystems, as it supports the growth of organisms and prevents the depletion of oxygen in deeper layers.
Consider the incorrect options: Permanent stratification, increased salinity, and prevention of ice formation are not effects of turnover. Stratification is typically broken during turnover, salinity is not affected, and ice formation is influenced by temperature rather than turnover.
Conclude with the correct answer: Turnover is important because it helps distribute nutrients and oxygen throughout the lake, supporting aquatic life and maintaining ecological balance.
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