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Ecosystems

7.10ABC Organisms, Environments, and Ecosystems

TermDefinition
ECOSYSTEM System consisting of all of the interactions that occur between the abiotic & biotic factors within an environment; "eco-" = earth
BIOME 1 of the world’s major communities, classified according to the predominant vegetation; characterized by adaptation of organisms to that particular environment.
HABITAT Place where an organism naturally lives & grows.
MICROHABITAT Very small, specialized habitat, such as the space under a rock; "micro-" = small
POPULATION Group of organisms of the same species located within the same geographical location.
BIODIVERSITY Number of different species of plants & animals in an area.
ECOLOGICAL SUCESSION Change in types of species present in a community over time, such as after a disturbance.
CLIMAX COMMUNITY 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 Individual animal, plant, or single-celled life form.
BIOTIC FACTOR Living or once living part of an organism's habitat; "bio-" = life
ABIOTIC FACTOR Non-living parts of an ecosystem such as soil, climate & rainfall; "a-"= not or without
TERRESTRIAL BIOME Large geographic land areas with similar climates & ecosystems; "terra-" = earth
AQUATIC BIOME Various water (fresh & salt) systems that make up distinct communities; "aqua-" = water
PRIMARY SUCCESSION 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.
ENVIRONMENT The surroundings or conditions in which a person, animal, or plant lives or operates.
COMMUNITY All the different populations that live together in an area.
INTERDEPENDENCE The dependence of two or more living things on each other.
TROPHIC LEVEL Each step in a food chain, food web, or energy pyramid.
ADAPTATION Inherited characteristic that increases an organism's chance of survival.
PIONEER SPECIES First species to populate an area during ecological succession.
LIMITING FACTOR An environmental factor that prevents a population from increasing.
DISTURBANCE An event, such as storm, fire, flood, drought, overgrazing or human activity, that changes a community and alters resource availability.
INVASIVE SPECIES Species that enter new ecosystems and multiply, harming native species and their habitats.
EQUILIBRIUM A state in which opposing forces or influences are balanced.
Created by: trauberk
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