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27 Cards in this Set
- Front
- Back
age structure |
relative number of individuals in a cohort or a population
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allee effect |
example of positive feedback. growth rates increase with population size
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carrying capacity |
population stabalizes at a certain size of particular place where it lives
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clumped |
individuals clustered together in response too uneven distribution of resources |
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demography |
study of statistics that illustrates the changing structure of populations, quantitative study of populations |
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density |
number of organisms in area divided by amount of area |
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density dependent factors |
depend on population size
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density independent factors |
natural disasters, affect regardless of size
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distribution |
random, uniform, or clumped
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ecology |
relations of organisms to one another and their physical surrondings |
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environmentalism |
environmental protection |
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exponential growth |
when resources in a habitat are unlimted the population in that habitat will grow in a geometric fashion |
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fecundity |
number of offspring produced in a standard time
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generation time |
average interval between the birth of an individual and the birth of its offspring
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growth rate |
measures how populations change in size |
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growth shape |
how the population shapes up to look like |
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intrinsic growth rate |
birth rate-death rate, maximum rate at which a population will grow under ideal conditions |
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limitation |
limits own growth by own actions |
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logistic growth |
s-shaped curve of population, common model for population |
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metapopulation |
network of distinct populations that interact with one another by exchanging individuals
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mortality |
the proportion of indivudals that started an interval alive but died at the end of it
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phenotypic plasticity |
individual adaptation, change phenotype in response to environemt |
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population ecology |
dynamics of species interactions and how they interact with the environment |
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population growth |
increase in number of individuals in a population |
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populations |
collection of organisms |
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regulation |
the adaptation of form or behavior of an organism to changed conditions |
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uniform spacing |
population is spaced uniformly |