Ecology

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Ecosystem

- a self contained, interacting communtiy of organisms and the environment which they live and interact in.

Community

all organisms of all different species living in a particular habitat

Population -

a group of organisms of the same species living in the same place at the same time

Habitat -

place in which an organism lives

Niche -

An organism's role in the ecosystem

Producer -

obtains food from inorganic sources from photosynthesis

- autotrophic organism

Consumer

obtains food in organic form directly or indirctly

- heterotrophic organism

Trophic level - the level in a food chain at which an oranism feeds

Nitrogen

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