A group of individuals of a single species living in the same general area.
The number of individuals per unit area or volume.
Mark - Recapture Method
Trapping animals then releasing them into the wild to mix and to see population by observing the amount mark/unmarked are caught.
The influx of new individuals from other areas.
The movement of individuals out of a population.
The pattern of spacing among individuals within the boundaries of the population.
The study of the vital statistics of populations and how they change over time.
Age - specific summaries of the survival pattern of a population. (ex. Death Rates)
The traits that affect an organism's schedule of reproduction and survival (from birth through reproduction to death).
Zero Population Growth
When the per capita birth and death rates are equal (r=0).
Exponential Population Growth
When members of a population all have access to abundant food and are free to reproduce at their physiological capacity.
Symbolizes as k, the maximum population size that a particular environment can support. Not fixed but can vary over space and time, with abundance of limiting resources.
Logistic Population Growth
The per capita rate of increase declines as carrying capacity is reached.
K - Selected Populations
Selection of life history traits that are sensitive to population density (density dependent selection).
R - Selected Populations
Selection of life history traits that maximizes reproductive success in uncrowded environments (low densities) called (density independent selection).
Density - Independent Factor
A birthrate or death rate that does not change with population density.
Density Dependent Factor
A death rate that rises as population density rises, as is a birth rate that falls with rising density.
The relative number of individuals of each age.
Summarizes the aggregate land and water area appropriated by each nation to produce all the resources it consumes and to absorb all the waste it generates. (arable land, pasture, forest, ocean, built-up land, fossil energy land).