Population ecology - The study of the number of a particular organism that is found in an area and why that number changes or stays fixed over time.
Population - A group of organisms of a single species living in a particular area at a given time.
Population density - The number of individuals per unit area at a given time.
Range - The geographic limit of its distribution.
*Random Distribution - When individuals are spaced unpredictably (randomly).
*Uniform Distribution - The individuals are evenly spaced in the environment.
*Clumped Distribution - The individuals are clumped usually around some resource.
Population growth - Involves measuring increases/decreases in population size over time.
Immigration - Move into an area
Emigration - Move out of an area
Natality - Birth rate
Mortality - Death rate
Biotic potential - The maximum rate at which a population could increase under ideal conditions.
*Exponential growth - Population growing at its biotic potential. J shaped curve
Environmental resistance - Environmental conditions that limit a species from reproducing at its maximum rate.
Carrying capacity - The largest population size that an environment can support over time.
*Logistic growth - S shaped curve. The population levels off under it's carrying capacity.
*Predator-prey cycles - Offset Cycles. Each controls the others population size.
*Sudden decline or Sudden death - Population growth greatly exceeds the carrying capacity and then there is a crash to 0.
Age structure - Graph of 3 age groups: Pre-reproductive, Reproductive, and Post-reproductive