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13 Cards in this Set
- Front
- Back
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Biogeography |
The study of the biological distribution of a species and the reason for their pattern of distribution |
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Island |
An isolated habitat completely separated from others of its kind can be considered as an island |
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Equilibrium theory of island biogeography |
The theory proposes that the number of species on any island is determined by a balance between the rate of immigration and the rate of extinction |
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Island features |
When an island is nearly empty the extinction rate is low as few species are available to be extinct As number of species on an island increases the immigration rate decreases |
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Island features |
When an island is nearly empty the extinction rate is low as few species are available to be extinct As number of species on an island increases the immigration rate decreases |
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Effects on immigration and extinction rates |
Size and distance from mainland |
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Island features |
When an island is nearly empty the extinction rate is low as few species are available to be extinct As number of species on an island increases the immigration rate decreases |
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Effects on immigration and extinction rates |
Size and distance from mainland |
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Effect of size |
The lower rate of extinction on larger islands results in a higher equilibrium number of species as compared to smaller islands |
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Island features |
When an island is nearly empty the extinction rate is low as few species are available to be extinct As number of species on an island increases the immigration rate decreases |
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Effects on immigration and extinction rates |
Size and distance from mainland |
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Effect of size |
The lower rate of extinction on larger islands results in a higher equilibrium number of species as compared to smaller islands |
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Effect of distance |
For two islands of equal size an island close to mainland generally has higher immigration rate than the one farther away |
