Ecosystem and Ecological Concepts

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Ecosystem

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A community of organisms and their abiotic environment

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Biotic factors

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Living parts of an ecosystem

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Abiotic factors

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Nonliving parts of an ecosystem

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Limiting factors

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Environmental factors that restrict population growth

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Population

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A group of individuals that belong to the same species and live in the same area

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Autotroph/Producer

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An organism that makes its own food through photosynthesis.

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Heterotroph/Consumer

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Organisms that must eat other organisms for energy

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Decomposers

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Organisms that break down the dead remains of other organisms

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Energy pyramid

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Shows the amount of energy that moves from one feeding level to another in a food web

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10% rule of energy transfer

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When energy is passed in an ecosystem from one trophic level to the next, only ten percent of the energy will be passed on