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20 Cards in this Set
- Front
- Back
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population dynamics |
factors influencing the expansion, decline, or maintenanceof populations |
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numerical responses |
changes in the density of predatorpopulations in response to increased prey density |
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spates |
a sudden flood in a river, especially one caused by heavy rains or melting snow |
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drift |
downstream movementof stream organisms |
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colonization cycle |
dynamic view of stream populations in which upstream anddownstream dispersal, as well as reproduction, have majorinfluences on stream populations |
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subpopulations |
part of a larger population |
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metapopulation |
A group of subpopulations living on such patchesconnected by exchange of individuals among patches |
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life tables |
list boththe survivorship and the deaths, or mortality, in populations |
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cohort |
A group born during the same time period |
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static life table |
individuals in sample are born at differenttimes, involves a snapshot of survivalwithin a population during a short interval of time |
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age distribution |
proportionof individuals of different ages within a population |
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survivorship curve |
shows patterns of life anddeath within a population |
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type I survivorship curve |
A relativelyhigh rate of survival among young and middle-agedindividuals followed by a high rate of mortality among theaged |
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type II survivorship curve |
Constantrates of survival throughout life produce the straight-linepattern of survival |
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type IIIsurvivorship curve |
a period of extremelyhigh rates of mortality among the young is followed by a relativelyhigh rate of survival |
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fecundityschedule |
tabulation of birthrates forfemales of different ages in a population |
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birthrate |
the number of young born per female in aperiod of time |
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stableage distribution |
the proportion of individuals in each of the age classesis constant |
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geometric rate of increase |
the ratio of the population size at twopoints in time |
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clutch size |
the numberof eggs produced by a nesting female |
