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Definition
| The number of individuals per unit area or volume. |
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Definition
| The pattern of spacing among individuals within the boundaries of a population. |
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Definition
| A sampling technique used to estimate the size of animal populations. |
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Definition
| The influx of new individuals into a population from other areas. |
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Definition
| The movement of individuals out of a population. |
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Definition
| A behavior in which an animal defends a bounded physical space against encroachment by other individuals, usually of its own species. |
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Term
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Definition
| The study of changes over time in the vital statistics of populations, especially birth rates and death rates. |
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Definition
| An age-specific summary of the survival pattern of a population. |
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Term
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Definition
| A group of individuals of the same age in a population. |
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Definition
| 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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Term
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Definition
| An age-specific summary of the reproductive rates in a population. |
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Term
| Exponential Population Growth |
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Definition
| 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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Term
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Definition
| The maximum population size that can be supported by the available resources, symbolized as K. |
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Term
| Logistic Population Growth |
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Definition
| Population growth that levels off as population size approaches carrying capacity. |
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Term
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Definition
| The traits that affect an organism's schedule of reproduction and survival. |
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Term
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Definition
| Selection for life history traits that are sensitive to population density; also called density-dependent selection. |
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Term
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Definition
| Selection for life history traits that maximize reproductive success in uncrowded environments; also called density-independent selection. |
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Term
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Definition
| Referring to any characteristic that is not affected by population density. |
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Term
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Definition
| Referring to any characteristic that varies with population density. |
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Term
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Definition
| The study of how complex interactions between biotic and abiotic factors influence variations in population size. |
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Term
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Definition
| A group of spatially separated populations of one species that interact through immigration and emigration. |
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Term
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Definition
| In a stable population, a shift from high birth and death rates to low birth and death rates. |
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Term
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Definition
| The relative number of individuals of each age in a population. |
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Term
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Definition
| The aggregate land and water area required by a person, city, or nation to produce all of the resources it consumes and to absorb all of the wastes it generates. |
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