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27 Cards in this Set

  • Front
  • Back

age structure

relative number of individuals in a cohort or a population

allee effect

example of positive feedback. growth rates increase with population size

carrying capacity

population stabalizes at a certain size of particular place where it lives


individuals clustered together in response too uneven distribution of resources


study of statistics that illustrates the changing structure of populations, quantitative study of populations


number of organisms in area divided by amount of area

density dependent factors

depend on population size

density independent factors

natural disasters, affect regardless of size


random, uniform, or clumped


relations of organisms to one another and their physical surrondings


environmental protection

exponential growth

when resources in a habitat are unlimted the population in that habitat will grow in a geometric fashion


number of offspring produced in a standard time

generation time

average interval between the birth of an individual and the birth of its offspring

growth rate

measures how populations change in size

growth shape

how the population shapes up to look like

intrinsic growth rate

birth rate-death rate, maximum rate at which a population will grow under ideal conditions


limits own growth by own actions

logistic growth

s-shaped curve of population, common model for population


network of distinct populations that interact with one another by exchanging individuals


the proportion of indivudals that started an interval alive but died at the end of it

phenotypic plasticity

individual adaptation, change phenotype in response to environemt

population ecology

dynamics of species interactions and how they interact with the environment

population growth

increase in number of individuals in a population


collection of organisms


the adaptation of form or behavior of an organism to changed conditions

uniform spacing

population is spaced uniformly