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13 Cards in this Set
- Front
- Back
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Extirpation |
Local disappearance of species |
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Hot spots |
Species only found in a specific area of the world |
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Darwin’s finches are an example of |
Endemic species |
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Hot spots are |
areas with a lot of endemic species and they should be preserved |
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Keystone species is |
A species that impacts the structure of the community Its abundance is not important Example: Star fish |
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Ecosystem engineer is |
A species that modify the habitat in which they live Ex: humans, beavers |
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What happened to the forest of Costa Rica? and Why? |
The forrest increased in size this is because they have zone reserve (buffer zone) This is on the outside of the park which promotes growth |
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What is the relationship below: Carnivore herbivore Plants |
Bottom up |
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Bottom up networking means |
the main driver of the ecosystem comes from the bottom |
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What happens generally when a new species is introduced into an environment ?N |
They die |
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Extinction Vortex |
Small pop Interbreeding /genetic drift Loss of variability Lower ind. fitness Lower reproduction , higher mortality Small pop |
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Effective pop size equation |
Ne = 4(NmxNf)/(Nm+ Nf) Nf =# of reproducing females Nm= # of reproducing males |
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Effective pop size is |
Breeding potential of a pop at a given time If sex ratio is unbalanced, Effective pop size will be small and genetic drift will be felt |
