Ecology Concepts

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Commensalism

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A symbiotic relationship where one organism benefits while the other organism is unaffected.

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Competition

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Two or more organisms using the same limited resources causing some organisms to be unable to access the resources.

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Ecological succession

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Changes in the composition of species found in a community over time.

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Ecosystem

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A community interacting with its environment through a one-way flow of energy and the cycling of materials.

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Ecosystem stability

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The ability of an ecosystem to return to a state of equilibrium following a disturbance.

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Hypothesis

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A tentative and testable statement that must be capable of being supported or not supported by evidence.

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Mutualism

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A symbiotic relationship where both organisms benefit.

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Parasitism

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A symbiotic relationship where one organism benefits while the other organism is harmed.

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Predation

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An ecological relationship where one organism (predator) eats the other organism (prey).

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Trophic level

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Position that organism(s) occupy in a food web, which is defined by its relationship to the primary energy source.