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14 Cards in this Set
- Front
- Back
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Population ecology
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the study of groups density, distribution, ages, and size influenced by the environment
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Population
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a group of same species and area
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What are the 3 types of dispersion?
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clumped
uniform random |
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Demography
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study of statistics of population and how they change over time.
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Life table
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summary of ages of a population
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Population growth is projected by______ and ___________ rates
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Birth and death rates
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what is the population growth rate if r (growth rate is max) and n (population) and k (carrying capacity)
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rN(K-N)/K
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Semelparity reproduction
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reproduce once then die
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iteroparity reproduction
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Repeated reproduction
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What causes density dependent population regulation
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Competition for resources
toxic wastes predation intrinsic factors Territoriality disease |
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Predator and prey populations fluctuation in what shape over time?
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sine wave
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what is the estimated carrying capacity for humans on earth?
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10-15 billion
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K-Selection
r-selection |
K-Selection=selects traits that favor high density popul.
r-selection= selects for maximum reproductive success and is independent of density |
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allee effect
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hard to survive in smaller populations
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