In food chain energy is transferred between trophic levels However this transfer of energy fro...........

Environment and Ecology Concept of Ecosystems

In food chain, energy is transferred between trophic levels. However this transfer of energy from one trophic level to another is inefficient.

Choose incorrect statements about energy transfer:

Energy is dissipated as heat as organism carries cellular respiration.

Some organic molecules can’t be digested and leave body as faces.

Some organism in trophic level die without being eaten.

This “loss of energy” is low in mammals and birds.

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Explanation:

A )Energy available after the transfer (i.e. Available to smelt) = 1250 kJ m-2 year-1 Energy available before the transfer (i.e. Available to small aquatic animal) = 6 300 kJ m-2 year-1
Percentage = (1250 ÷ 6300) x 100 = 19.84%
b) Energy available after the transfer (i.e. Available to humans) = 50kJ m-2 year-1
Energy available before the transfer (i.e. Available to trout) = 250kJ m-2 year-1
Percentage = (50 ÷ 250) x 100 = 20%
c) Energy available after the transfer (i.e. Available to humans) = 50kJ m-2 year-1
Energy available before the transfer (i.e. Available to algae) = 42000kJ m-2 year-1
Percentage = (50 ÷ 42000) x 100 = 0.12%
Energy available before the transfer (i.e. Available to small aquatic animal) = 6 300 kJ m-2 year-1
Percentage = (1250 ÷ 6300) x 100 = 19.84%
b) Energy available after the transfer (i.e. Available to humans) = 50kJ m-2 year-1
Energy available before the transfer (i.e. Available to trout) = 250kJ m-2 year-1
Percentage = (50 ÷ 250) x 100 = 20%
c)Energy available after the transfer (i.e. Available to humans) = 50kJ m-2 year-1
Energy available before the transfer (i.e. Available to algae) = 42000kJ m-2 year-1
Percentage = (50 ÷ 42000) x 100 = 0.12%