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Definition of Indicator species

Indicator species Definition from Science & Technology Dictionaries & Glossaries
Description: A species whose status provides information on the overall condition of the ecosystem and of other species in that ecosystem. They reflect the quality and changes in environmental conditions as well as aspects of community composition.
Source: Global Biodiversity Assessment GBA
© European Communities, 1995-2004
Indicator species Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
An indicator species is any biological species that defines a trait or of the environment. For an example, a species may delineate an ecoregion or indicate an environmental condition such as a disease outbreak, pollution, species competition or climate change. Indicator species can be among the most sensitive species in a region, and sometimes act as an early warning to monitoring biologists.

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Indicator species Definition from Society & Culture Dictionaries & Glossaries
Environmental Engineering (English ver.)
(Environmental) Any organism that by its presence or absence, its frequency, or its vigor indicates a particular property of its surrounding environment. A species whose presence is a sign that certain environmental conditions exist. Also see Management Indicator Species.