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19 Cards in this Set
- Front
- Back
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dispersion
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The pattern of spacing among individuals
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demography
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The study of statistics relating to births and deaths in populations.
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semelparity
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when adults have a single reproductive opportunity to produce large numbers of offspring
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iteroparity
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when adults produce large numbers of offspring over many years
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carrying capacity
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maximum population size that can be supported by the available resources, symbolized as K.
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logistic growth equation
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rmax[(K-N)/K]N
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density–dependent selection
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K-selection
-centered around producing relatively few offspring that have a good chance of survival. |
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density–independent selection
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r–selection
-a high reproductive rate is the chief determinant of life history. |
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Density-Dependent Factors
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Mostly biological factors:
Competition Predation Disease |
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Density-Independent Factors
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Mostly environmental factors
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Type 1 survivorship curve
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curve where most organisms initially survive
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Type 3 survivorship curve
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curve where most organisms initially die
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population dynamics
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The study of how complex interactions between biotic and abiotic factors influence variations in population size.
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life table
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A table of data summarizing age specific mortality in a population.
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survivorship curve
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A plot of the number of members of a cohort that are still alive at each age; one way to represent age–specific mortality.
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reproductive table
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An age–specific summary of the reproductive rates in a population.
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metapopulation
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A a divided population of a single species. Interactions can occur via immigration/emmigration
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age structure
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The relative number of individuals of each age in a population.
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Allee effect
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individuals may have a more difficult time surviving or reproducing if the population size is too small
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