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|Noun||1.||environmental science - the branch of biology concerned with the relations between organisms and their environment|
biotic community, community - (ecology) a group of interdependent organisms inhabiting the same region and interacting with each other
association - (ecology) a group of organisms (plants and animals) that live together in a certain geographical region and constitute a community with a few dominant species
food chain - (ecology) a community of organisms where each member is eaten in turn by another member
food pyramid - (ecology) a hierarchy of food chains with the principal predator at the top; each level preys on the level below
food cycle, food web - (ecology) a community of organisms where there are several interrelated food chains
ecesis, establishment - (ecology) the process by which a plant or animal becomes established in a new habitat
ecological succession, succession - (ecology) the gradual and orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is established
ecological niche, niche - (ecology) the status of an organism within its environment and community (affecting its survival as a species)
cosmopolitan, widely distributed - growing or occurring in many parts of the world; "a cosmopolitan herb"; "cosmopolitan in distribution"
endemic - native to or confined to a certain region; "the islands have a number of interesting endemic species"