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9 Cards in this Set
- Front
- Back
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levels of biodiversity
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1-genetic diversity
2-species diversity 3-ecosystem div |
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Conservation Unit:
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-population w/in it's hab
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Metapopulation
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an assemblage of populations that are potentially interconnected by dispersal. (core pop w/ satellite pop's)
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Causes of local extinction:
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1-Demographic stochasticity (randomness in order of births and deaths>>for small pop's only)
2-genetic stochasticity (loss of genetic div. by drift & inbreeding>>small pop's) 3-environmental stochasticity (catastrophes>>not pop size dependent) |
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Escape in time strategies
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strategy that orgs use to evade known events (ie salmon leave the river before it runs dry)
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migration barriers
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roads, dams, urbanization
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Riparian forest buffers
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area around rivers protected from development
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threats to salmon survival:
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-hab loss
-hatcheries and fish farms -harvest -Introduced species |
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intermediate disturbance hypothesis
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made by Connell. after a dist, an intermediate time period later will have the greatest life, then competiotion will kick in to drive it down again.
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