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Question
What is the difference between the food habits of organisms belonging to the first and the third trophic levels? Give one example each of the organisms belonging to these two trophic levels.
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Solution
First trophic level:
- The organisms at the first trophic level in a food chain are always producers.
- They are autotrophs, they make their own food.
- For example, plants are producers.
Third trophic level
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The organisms at the third trophic level in a food chain are secondary consumers.
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They cannot prepare their own food.
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They are either carnivores or omnivores.
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They feed on herbivorous animals or primary consumers.
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For example, frogs; feed on insects.
First trophic level:
- The organisms at the first trophic level in a food chain are always producers.
- They are autotrophs, they make their own food.
- For example, plants are producers.
Third trophic level
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The organisms at the third trophic level in a food chain are secondary consumers.
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They cannot prepare their own food.
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They are either carnivores or omnivores.
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They feed on herbivorous animals or primary consumers.
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For example, frogs; feed on insects.
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