The length of food chains
The energy which plants capture from the sun during photosynthesis may end up in the tissues of a hawk via a bird the hawk has eaten, the insects eaten by the bird, and the plant on which the insects fed. The plant-insect-bird-hawk system is called a food chain, and each stage a trophic level. More generally, the trophic levels are called producers (plants), herbivores or primary consumers (the insects), carnivores or secondary consumers (the bird) and top-carnivores or tertiary consumers (the hawk).
KeywordsTrophic Level Food Chain Return Time Lower Trophic Level Insectivorous Bird
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