They are ecosystems developed by humans; comprising of domesticated animal and plants used to produce food for mankind.
Humans are often the third or fourth trophic level in natural ecosystems, so recieve little of the energy absorbed from the Sun.
Therefore, agriculture ensures as much as possible of the Sun's availible energy is transferred to humans. This channels more energy directly into the human food chain, so productivity is upped.
Comments
No comments have yet been made