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19 Cards in this Set

  • Front
  • Back
dispersion
The pattern of spacing among individuals
demography
The study of statistics relating to births and deaths in populations.
semelparity
when adults have a single reproductive opportunity to produce large numbers of offspring
iteroparity
when adults produce large numbers of offspring over many years
carrying capacity
maximum population size that can be supported by the available resources, symbolized as K.
logistic growth equation
rmax[(K-N)/K]N
density–dependent selection
K-selection
-centered around producing relatively few offspring that have a good chance of survival.
density–independent selection
r–selection
-a high reproductive rate is the chief determinant of life history.
Density-Dependent Factors
Mostly biological factors:
Competition
Predation
Disease
Density-Independent Factors
Mostly environmental factors
Type 1 survivorship curve
curve where most organisms initially survive
Type 3 survivorship curve
curve where most organisms initially die
population dynamics
The study of how complex interactions between biotic and abiotic factors influence variations in population size.
life table
A table of data summarizing age specific mortality in a population.
survivorship curve
A plot of the number of members of a cohort that are still alive at each age; one way to represent age–specific mortality.
reproductive table
An age–specific summary of the reproductive rates in a population.
metapopulation
A a divided population of a single species. Interactions can occur via immigration/emmigration
age structure
The relative number of individuals of each age in a population.
Allee effect
individuals may have a more difficult time surviving or reproducing if the population size is too small