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Ecosystems

7.10ABC Organisms, Environments, and Ecosystems

TermDefinition
Ecosystem A system consisting of all of the interactions that occur between the abiotic and biotic factors within an environment.
Biome One of the world’s major communities, classified according to the predominant vegetation and characterized by adaptation of organisms to that particular environment.
Habitat A place where an organism naturally lives and grows.
Microhabitat A very small, specialized habitat, such as the space under a rock.
Population A group of organisms of the same species located within the same geographical location.
Biodiversity The number of different species of plants and animals in an area.
Succession (Ecological Succession) A change in types of species present in a community over time, such as after a disturbance.
Climax Community A relatively stable state of succession, or the end product of succession.
Sustainable Capable of maintaining the current community at a steady level without exhausting natural resources or causing severe ecological damage.
Organism An individual animal, plant, or single-celled life form.
Biotic Factor A living or once living part of an organism's habitat.
Abiotic Factor The non-living parts of an ecosystem such as soil, climate and rainfall.
Terrestrial Biome Large geographic land areas with similar climates and ecosystems.
Aquatic Biome Various aquatic systems that make up distinct communities.
Primary Succession An ecological succession that begins in an area where no biotic community previously existed.
Secondary Succession Succession on a site where an existing community has been disrupted.