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Ch 33b
Exam 4: Community Ecology
| Question | Answer |
|---|---|
| consists of all the various populations at a locale and the structure that results | community |
| One way to measure a community is to look at species diversity which consists of: | richness; evenness |
| richness | the number of species |
| evenness | the equal distribution of individuals among the species |
| An organism’s ______ is where it lives in the community (forest floor, swift river, or ocean’s edge) | habitat |
| the role an organism plays in the community including habitat and interactions with other species | ecological niche |
| Niche includes..., but we can only study a few at a time | many environmental factors |
| Examples of environmental factors | Food requirements, nesting requirements and effects of abiotic factors like temperature and humidity |
| the conditions an organism can occupy when not interfered with by other organisms | fundamental niche |
| the conditions an organism actually occupies (smaller) | realized niche |
| Barnacle Chthamalus – intertidal area | (fundamental niche) |
| Upper tidal | (realized niche) |
| Individuals try to use the same resource that is limited | competition |
| two species can not occupy exactly the same niche at the same time | competitive exclusion principle |
| competitive exclusion principle example | two Paramecium species |
Created by:
chelsea_2010
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