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Unformatted text preview: Communities Communities of plants, animals, and other organisms may be found in such places as a desert, a salt marsh, or a forest. Within a community , each population of organisms has a habitat and niche. The habitat is the physical place where the organisms live, while the niche is the role that the population plays in the life of the community. The niche is the population's function and position in the ecosystem, and it reflects the population's relationship to other populations. A population's niche is defined by how and when it reproduces, what time of the day and year it is most active, what climatic factors it can withstand, what it eats, and so forth. The competition exclusion principle suggests that two species cannot occupy the same niche in the same place at the same time. Two populations living together in a community in a close and permanent association is...
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This note was uploaded on 11/11/2011 for the course BIO 101 taught by Professor Pesthy during the Fall '07 term at Texas State.
- Fall '07