Key Definitions

Definitions for Populations and Ecosystems

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  • Created by: Frankie
  • Created on: 14-06-12 13:53

Ecology

 Relations of organisms to one another and to their physical surroundings.

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Habitat

Geographical area occupied by an ecosystem

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Population

All the members of one species in a habitat/particular habitat

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Community

All organisms in a particular habitat

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Ecosystem

An ecological community together with its environment, functioning as a unit in a given area

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Environment

All the factors in a habitat which affect an organism (conditions of the habitat)

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Biotic

Living organisms

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Abiotic

Non-living chemical and physical factors in the environment

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Niche

The way an organism fits in to the environment/ the job of the organism

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Trophic Level

Energy level in a food chain

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Species

A grup of individuals capable of breeding and which produce fertile offspring

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Producer

Organism that produces its own energy

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Consumer

Consumes another organism to get energy

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Herbivore

An animal that feeds on plants

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Carnivore

An animal that eats meat

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Omnivore

An organism that feeds on both plants and animals

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Decomposer

An organism that decomposes organic material

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Autotroph

Capable of self-nourishment by producing its own energy form inorganic materials

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Heterotroph

An organism that cannot synthesis its own food or energy so consumes other organisms

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Saprotroph

An organism that feeds on or derives nourishment from decaying organic matter

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