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19 Cards in this Set
- Front
- Back
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Population density
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The number of individuals of a species per unit area or volume of the habitat.
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Dispersion
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The pattern of spacing among individuals
within the boundaries of a population. |
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Exponential growth
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Growth of a
population in an ideal, unlimited environment, represented by a J-shaped curve when population size is plotted over time. |
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Logistic growth
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Population
growth that levels off as population size approaches carrying capacity. |
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Limiting factors
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An environmental factor that restricts the number of individuals that can occupy a particular habitat, thus holding population growth in check.
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Growth rate
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birth rate - death rate; rate at which the population grows
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Carrying capacity
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The maximum population
size that can be supported by the available resources, symbolized as K. |
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Density dependant
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Referring to any characteristic
that varies with population density. |
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Density independant
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Referring to any characteristic
that is not affected by population density. |
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Population cycles
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A phenomenon where populations rise and fall over a period of time.
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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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Pyramidal-rapid growth
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More younger people than older people in a population.
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Columnar-stable growth
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Even distribution of ages in a population.
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Diamond-declining
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More middle age people in a population.
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Life history
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The traits that affect an organism’s
schedule of reproduction and survival. |
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Life table
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An age-specific summary of the
survival pattern of 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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Opportunistic life
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The pattern of reproducing when young and producing many offspring that recieve little or no parential care; often short lived, small bodied species.
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Equilibrial life history
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The pattern of reaching sexual maturity slowly and producing few offspring but caring for the young; often seen in long lived, large bodied species.
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