Ecology

Ecology is the study of how living organisms interach with each other. Ecologists may study only oart of an ecosystem, for example how a pride of lions in an African Savannah interact with each other and with their environment. They may study how agriculture affects the ecosystem where it is done.

An ecosystem is a ccommunity of animals, plants etc together with non living stuff that affects these organisms. An ecosystem can be as large as the whole Earth or as small as a puddle. Ecosystems include autotrophs, that is living organisms that derive energy from non-living sources. Mostly autrothps are photosynthetic plants that get energy from sunlight but some ecosystems in dark caves or by hydrothermal vents get energy from chemical reactions.

References and external links

 * Ecology
 * Ecosystems