Term
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Definition
| group of organisms of the same species that live in the same area and interbreed |
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Term
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Definition
| of a population, the number of individuals in each of several age categories |
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Definition
| statistics that describe a population |
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Term
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Definition
| method of estimating population size of mobile animals by marking individuals, releasing them, then checking the proportion of marks among individuals recaptured at a later time |
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Term
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Definition
| method of estimating population of organisms that do not move by making counts in small plots, and extrapolating from this to the number in the larger area |
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Definition
| number of individuals per unit area |
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Term
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Definition
| describes whether individuals are clumped, uniformly dispersed, or randomly dispersed in an area |
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Term
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Definition
| total number of individuals in a population |
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Term
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Definition
| of a population, all individuals who are reproductive age or younger |
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Term
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Definition
| maximum number of individuals of a species that an environment can sustain |
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Term
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Definition
| factor that limits population growth and has a greater effect in dense populations than less dense ones. |
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Term
| density-independent factor |
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Definition
| factor that limits population growth and arises regardless of population density |
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Term
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Definition
| a necessary resource, the depletion of which halts population growth |
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Term
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Definition
| density-dependent limiting factors cause population growth to show as population size increases |
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Term
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Definition
| group of individuals born during the same time interval. |
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Definition
| species adapted to a stable environment, where population size is often near carrying capacity. |
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Term
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Definition
| a set of traits related to growth, survival, and reproduction such as age-specific mortality, life span, age at first reproduction, and number of breeding events |
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Term
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Definition
| species adapted to an environment that changes rapidly and unpredictably, so population size is often far below carrying capacity |
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Term
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Definition
| graph showing the decline in numbers of a cohort over time. |
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Term
| demographic transition model |
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Definition
| model describing changes in birth and death rates that occur as a region becomes industrialized |
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Term
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Definition
| area of earth's surface required to sustainably support a particular level of development and consumption |
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Term
| replacement fertility rate |
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Definition
| fertility rate at which each woman has, on average, one daughter who survives to reproductive age. |
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Term
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Definition
| average number of children the woman of a population bear over the course of a lifetime |
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