In a lake ecosystem, the primary consumers are ________.

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SSC CGL 2022 Tier-I Official Paper (Held On : 08 Dec 2022 Shift 2)
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  1. zooplankton
  2. phytoplankton
  3. bacteria
  4. fishes

Answer (Detailed Solution Below)

Option 1 : zooplankton
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Detailed Solution

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The correct answer is zooplankton.

Key Points

  • Although there may be some fish that consume phytoplanktons, the main consumers in a lake environment are zooplanktons. Zooplankton is thus the dominant second trophic level in a lake environment.
  • The majority of zooplankton species are tiny, microscopic organisms. a single-celled protist that primarily consumes bacteria, for instance. Nonetheless, some zooplankton species can grow fairly large such as jellyfish, arrow worms, etc.
  • They are the main consumers because they consume producers like phytoplankton, which are then consumed by small fish (secondary consumers).

Additional Information

  •  Food Chain
    • A food chain demonstrates the relationship of feeding between several creatures in a specific habitat or ecosystem.
    • The energy flow from the sun to producers, from producers to consumers, and from consumers to decomposers like fungi is demonstrated by a food chain.
    • They also demonstrate how animals rely on other living things for nourishment.

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