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14 Cards in this Set
- Front
- Back
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density dependent
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Limiting factors that have an increasing affect as the population increases
ex: diseases, intraspecific competition |
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Density independent
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limiting factors that affect population regardless of their size
ex: hurricanes, drought |
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Growth rate
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difference between birth rate and death rate
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Fertility Rate
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the number of children a female will reproduce during her reproductive years
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Geographic Distribution
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The movement of humans from one population to another
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habitat
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where an organism lives
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Niche
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an organisms occupation " what it does"
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Autotrophs
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Transform energy from nonliving substances into organic substances (plants)
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chemoautotrophs
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get energy from chemicals and geothermal energy
ex: salt, sulfide, hydrogen |
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Parasitism
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The host gains form the interaction but the prey loses
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Mutualism
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both organisms gain from the interaction
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Commensalism
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One organism gain and the other is not affected by the interaction
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species richness
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the total number of different species that occupy a community
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Species evenness
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the number of organisms found in each species
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