ch05_0495556718_164043

ch05_0495556718_164043 - 3 Species interact with each other...

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Chapter 5 Biodiversity, Species Interactions, and Population Control Summary 1. Two major factors affect the number of species in a community: the latitude in terrestrial communities and pollution in aquatic systems. 2. Species play different roles in a community. Native species sustain the ecosystem in which they are a part. Some nonnative species will crowd out native species. Indicator species alert us to harmful changes in the community. Keystone species play ecological roles in the specific community: they may assist in pollination help regulate populations. Foundation species affect the community’s habitat to benefit other species.
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Unformatted text preview: 3. Species interact with each other in these different ways: interspecific competition, predation, parasitism, mutualism, and commensalism. 4. As environmental conditions change, one species may be replaced by other groups of species. This gradual change in the composition of species in a given area is called ecological succession. 5. A community has three aspects of sustaining itself: its persistence, the ability to resist being altered, its constant population, and its resilience in repairing damage. High biodiversity may give a community some edge in surviving, but we do not know this for certain....
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This note was uploaded on 07/26/2009 for the course BIO 1100 taught by Professor Na during the Spring '09 term at Concordia AB.

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