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Population Dynamics

7th Grade Life Science

A group of organisms that are the same species living together in the same area , at the same time. population
Occurs when individuals join a population. immigration
Occurs when individuals leave a population. emigration
The things living organisms need in order to survive in their environment. resources (water, shelter, space, mates)
The maximum number of individuals of one species that the environment can support. carrying capacity
When an environment's ability to take care of living organisms suddenly drops or decreases. population crash
competition when living organisms have to "fight over" the same resources.
Nonliving factors in an environment abiotic
Living factors in an environment biotic
Something in the environment that keeps the living organisms in check so they don't reach carrying capacity. limiting factor
When living organisms work together in order to survive. cooperation