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Question
Second most important trophic level in a lake is
Second most important trophic level in a lake is
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Solution
The correct option is A Zooplankton
A lake ecosystem is an aquatic food chain. It consists of different trophic levels. The first trophic level is phytoplankton. They produce their own food. Zooplankton are primary consumers in aquatic food chains. They feed upon phytoplankton. They are present in the second trophic level. Hence, second most important trophic level in a lake is zooplankton. Small fishes feed upon zooplankton. They are present in the third trophic level. Similarly, big fishes and other bigger aquatic animals are present in the fourth trophic level which feed upon small fishes.Thus, the correct answer is 'Zooplankton.
A lake ecosystem is an aquatic food chain. It consists of different trophic levels. The first trophic level is phytoplankton. They produce their own food. Zooplankton are primary consumers in aquatic food chains. They feed upon phytoplankton. They are present in the second trophic level. Hence, second most important trophic level in a lake is zooplankton. Small fishes feed upon zooplankton. They are present in the third trophic level. Similarly, big fishes and other bigger aquatic animals are present in the fourth trophic level which feed upon small fishes.
Thus, the correct answer is 'Zooplankton.
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