Lecture 11: Intraspecific competition

Intraspecific competition

Competition between members of the same species

Density dependence

Regulation of population growth by the size of the population

If k=100 and N=110, the population should

Decrease

Overshoot

Population grows beyond carrying capacity

Die off

Substantial decline in population density

Scramble competition

Limited resources are shared equally

Contest competition

Some individuals claim more than their fair share of a limited resource, others get less

Exploitation competition

Competing individuals do not interact directly with one another

Interference competition

Competing individuals directly interact

Allee effect

Reduction in reproduction or survival at low population sizes

Density independence

Population growth rates do not depend on population size. Natural disaster, Temperature or precipitation

An eagle population near carrying capacity grows slowly. This is an example of

Direct density dependence