Ecology Terms set 3 of 3

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Symbiosis

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A close and often long-term interaction between two different biological species.

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Mutualism

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A type of symbiosis where both species benefit from the interaction.

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Commensalism

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A type of symbiosis where one species benefits while the other is neither helped nor harmed.

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Parasite

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An organism that lives on or in a host organism and gets its food at the expense of its host.

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Host

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An organism that harbors a parasite, providing nourishment and shelter.

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Biodiversity

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

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Niche

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The role or function of an organism or species within an ecosystem, including its use of resources and relationships with other species.

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Food Chain

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A linear sequence of organisms through which nutrients and energy pass as one organism eats another.

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Food Web

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A complex network of interlinked food chains in an ecosystem.

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Energy Pyramid

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A graphical representation of the energy flow in a community, showing the amount of energy at each trophic level.