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Ch. 3 Communities

Community Ecology

TermDefinition
communities a group of interacting population that occupy the same area at the same time
tolerance the ability of any organism to survive when subjected to abiotic factors or biotic factors
limiting factor any abiotic or biotic factor that restricts the numbers, reproduction, or distribution of organisms
range of tolerance for any environmental factor, there is an upper limit and lower limit that defines the condition in which an organism can survive
ecological succession a change in an ecosystem that happens when one community replaces another as a result of changing abiotic and biotic factors
primary succession establishment of a community in as area of exposed rock that does not have any topsoil
cause of primary succession volcanic eruption followed by a large lava flow
secondary succession the orderly and predictable change that takes place after a community of organisms has been removed but the soil has remained intact.
causes of secondary succession flooding, tornado, hurricane, fire
climax community the stable, mature community that results when there is little change in the composition of species
pioneer species first organisms to appear after primary succession, form on bare rock and secrete acids to break down the rock, forming soils
examples of pioneer species (2) lichens, moss
Created by: rajeckit