Question

The dominant second trophic level in a lake ecosystem consists of

• A. The biotic components are almost similar
• B. The abiotic components are almost similar
• C. Primary and secondary consumers are similar
• D. Both biotic and abiotic components are different

Answer 1

The correct option is A The biotic components are almost similar

In a food chain of the lake ecosystem, the producers are phytoplanktons and the consumers which directly depend on phytoplanktons for food are called primary consumers. These primary consumers in a lake ecosystem are basically zooplanktons, although it may include some fish that feed on the phytoplanktons. Therefore, the dominant second trophic level in a lake ecosystem consists of zooplanktons.