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Concept of Trophic Levels

What is the f...

Question

What is the first trophic level in a lake ecosystem?

A

Benthos

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B

Plankton

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C

Zooplankton

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D

Phytoplankton

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Solution

The correct option is D
Phytoplankton

The first trophic level in any ecosystem is formed by producers. In an aquatic ecosystem like a lake phytoplankton are the producers and hence form the first trophic level. Zooplankton form the second trophic level. Plankton is a common term for all microscopic organisms in the aquatic ecosystem. Benthos or benthic orgnisms lie at the bottom of the lake or water body.

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Concept of Trophic Levels

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