physical or nonliving factor in an ecosystem

living factors in an ecosystem.

the total amount of living tissue within a given trophic level

the part of the Earth that supports life; includes the atmosphere, land and water

each step in a food chain or food web

relationhip in which 2 species live closely together

Symbiotic relationship in which one organisms lives on or inside another organism and harms it

symbiotic relationship in which both species benefit from the relationship

symbiotic relationship in which one organism benefits and the other is neither helped nor harmed

Succession that occurs in an area in which no trace of a previous community in present; no soil

type of successsion that occurs in an area that was only partially destroyed by disturabnces; there is soil

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