The largest population that an environment can support at any given time.
The evolution of two or more species that is due to mutual influence.
A relationship between two organisms in which one organism benefits and the other is unaffected.
The exclusion of one species by another due to competition.
The largest ecological niche where an organism or species can live
A species that is critical to the functioning of the ecosystem in which it lives because it affects the survival and abundance of many other species in its community.
A relationship between two species in which both species benefit.
The unique position occupied by a species. Both in terms of its physical use of its habitat and its function within an ecological community.
A relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harmed.
A group of organisms of the same species that live together in one place at one time and interbreed.
An interaction between two organisms in which one organism, the predator, kills and feeds on the other organism, the prey.
The movement of individuals into a population.
The movement of individuals out of a population.
Occurs when numbers increase by a certain factor in each successive time period.
Occurs when a population starts with a minimum number of individuals and reaches a maximum depending on the carrying capacity of the habitat.
The actual niche that a species occupies in a community as a result of competition
A relationship in which two different organisms live in close association with each other.
Animals eating plants.
Variable affected by the number of organisms present in a given area.
Variable that affects a population regardless of the population density.