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8 June, 22:51

Which organism belongs to more than one trophic level

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  1. 8 June, 23:45
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    Example 1:

    Human being (Man) is an omnivore, i. e. its feeds on both plants and animals.

    When man feeds on plant, he becomes a herbivore (occupying the Second Trophic level).

    When he eat animals (meat), he becomes a carnivore thus occupying higher tropic level in the food chain.

    Example 2:

    Consider the following three food chains:

    First Chain: Grass (T1) → Grasshopper (T2) → Lizard (T3) → Hawk (T4)

    Second Chain: Grass (T1) → Grasshopper (T2) → Hawk (T3)

    Third Chain: Grass (T1) → Grasshopper (T2) → Frog (T3) → Snake (T4) → Hawk (T5)

    In the First food chain, Hawk occupies the Fourth Trophic level, i. e. it is a Secondary carnivore.

    In the Second food chain, Hawk occupies the Third Trophic level, i. e. it is a Primary Carnivore.

    In the Third food chain, Hawk occupies the Fifth trophic level, i. e. it is a Top-level carnivore.

    Thus, Humans (Man) and Hawk occupies more than one trophic level in the ecosystem.
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