Interactions of Living Things Vocabulary
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ecology
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The study of how living things interact with each other and their environment
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abiotic factor
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a nonliving part of an ecosystem
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biotic factor
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all the living things in an ecosystem
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population
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a group of organisms of the same species populating a given area
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community
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(ecology) a group of interdependent organisms inhabiting the same region and interacting with each other
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ecosystem
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All the organisms in a given area as well as the abiotic factors with which they interact; a community and its physical environment.
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biosphere
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part of Earth in which life exists including land, water, and air or atmosphere.
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population density
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number of individuals per unit of area
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limiting factor
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anything that restricts the number of individuals in a population
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symbiosis
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any close relationship between species, including mutualism, commensalism, and parasitism.
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niche
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organism's role, or job, in its habitat
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habitat
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the type of environment in which an organism or group normally lives or occurs
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food chain
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(ecology) a community of organisms where each member is eaten in turn by another member
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food web
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(ecology) a community of organisms where there are several interrelated food chains
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water cycle
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the continuous movement of water between Earth's surface and the air, changing from liquid to gas to liquid
