Populations and Ecosystems Vocabulary

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Abiotic Factor

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A non-living feature of an ecosystem (rock, water, sun, etc.)

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Biodiversity

Back

The variety of life in the world or in a particular ecosystem or habitat

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Biotic Factor

Back

A living feature of an ecosystem (plants, animals, leaves, etc.)

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Density-Dependent Factor

Back

The tendency for the death rate in a population to increase, or the birth or growth rate to decrease, as the density of the population increases

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Density-Independent Factor

Back

The tendency for the death, birth, or growth rate in a population neither to rise nor fall as the density increases

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Population

Back

A group of individuals of one species in an area

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Coexistence

Back

The living together of two organisms or species in the same habitat without trying to eliminate the other

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Commensalism

Back

An association between two organisms in which one benefits and the other derives neither benefit nor harm.

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Competition

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An interaction between organisms or species for resources (food, shelter, etc.)

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Mutualism

Back

A relationship between two species of organisms that both benefit from the relationship