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11 Cards in this Set
- Front
- Back
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four characteristics of populations studied by ecologists
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geographic range, density and distribution, growth rate and age structure.
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four major things that affect growth rate
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birth rate, death rate, immigration and emigration
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three phases of logistic growth
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one: exponential growth
two: growth slows down (death rate decreases) three: growth stops (birth and death rate are equal) |
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carrying capacity
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max number of individuals of a particular species in a particular environment that it can support
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limiting factor
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factor that controls growth of a population
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density dependent vs density indepent factors
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dd=number of individuals per unit area, dont affect small.scattered populations as much.
d.id=affect all populations in similar ways, regardless of population size and density |
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five types of density dependent limiting factors
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competition, predatition, herbivory, parasitism and disease, stress from overcrowding
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who influenced Charles Darwin's thinking
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Thomas Malthus
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h
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g
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organ
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group of.tissues
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tissue
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group.of similar
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