"Ecosystem", "Is all the living and nonliving things in an area and their interactions." "Population", "Is all the members of a species living in a certain area." "Community", "Is all the different organisms that live and interact in an area." "Niche", "Is the way an organism interacts with living and nonliving parts of its ecosystem." "Symbiosis", "Is the close association of members of different species that live together." "Succession", "Is the gradual replacement of one community by another over time."
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