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26 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Population Size |
The number of individuals of a specific species occupying a given area at a given time. |
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Population Density |
The number of individuals of the same species that occupy per volume. |
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Population Dispersion |
The general pattern in which individuals are distributed through a specific area. |
Clumped, uniform, random |
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Clumped Dispersion |
The pattern in which individuals in a population are more concentrated in certain parts of habitat. |
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Uniform Dispersion |
Individuals are evenly dispersed throughout the habitat. |
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Random Dispersion |
Individuals are spread throughout a habitat in an unpredictable and patternless manner. |
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Natality |
Number of births per unit of time. |
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Mortality |
Number of deaths per unit of time. |
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Immigration |
Number of individuals that move into an existing population per unit of time. |
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Emigration |
The number of individuals that move away from an existing population per unit of time. |
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Per Capita Growth Rate |
The change in population size relative to the initial size of population per unit of time. |
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Open Population |
A population in which change in size and density is determined by natality, mortality, emigration, and immigration. |
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Closed Populations |
A population in which change in size and density is determined by natality and mortality alone. |
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Exponential Growth |
A pattern of population growth in which the population size increases by a fixed rate per unit of time. |
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Environmental Influence |
Any factor that limits the populations ability to reach its biotic potential when it nears or exceeds the environmental carrying capacity. |
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Logistic Growth |
A model of population growth describing growth that levels off as the size of the population approaches it's carrying capacity. |
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Lag Phase |
Initial stage in which a population's growth rates are slow as a result of a smaller population size. |
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Log Phase |
The stage in which growth rates are very rapid (and steady). |
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Stationary Phase |
The phase at which population rates reach zero, as the population size reaches carrying capacity and stabalizes. |
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Density Dependant Factor |
A factor that influences a population at a particular density. |
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Intraspecific Competition |
Individuals of the same species rely on the same resources for survival. |
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Predation |
An ecological interaction in which a predator kills and consumes a prey. |
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Minimum Viable Population Size |
The smallest number of individuals needed for a population to continue for a certain amount of time. |
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Density Independent Factors |
A factor that has the same influence on a population at any density. |
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K-Selected Organism |
An organism that is adapted to survive at or near the carrying capacity of the environment. |
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R-Selected Organism |
An organism that is adapted to increase population size randomly. |
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