Most food chains have only 4-5 trophic levels because only about 20% of energy is transferred at each level, and the remaining energy is insufficient to support a large enough breeding population at higher levels.
Majoritatea lanțurilor trofice au doar 4-5 niveluri deoarece doar aproximativ 20% din energia este transferată la fiecare nivel, iar energia rămasă este insuficientă pentru a susține o populație reproductivă suficient de mare la nivelurile superioare.
| Front | why do most food chains only have 4/5 trophic levels? |
|---|---|
| Back | the proportion of energy transferred at each trophic level is small (20%) insufficient energy available to support a large enough breeding population at trophic levels higher than these |
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