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Biodiversity (or biological diversity) is the variety of life forms on earth - the different plants, animals and microorganisms, the genes they contain, and the ecosystems of which they form a part. It is not static but constantly changing - increased by genetic change and evolution and reduced by processes such as habitat degradation and extinction.
Tasmania, including all its islands, supports a wide variety of plants and animals including approximately:
(Source: Nature Conservation Branch, Department of Primary Industries, Water and Environment.)
Tasmania's isolation from mainland Australia has supported biodiversity by protecting native species from most of the introduced animal species that have affected the flora and fauna of mainland Australia. However, Tasmania is currently threatened by the potential establishment of the fox.
More information on fox sightings in Tasmania and the potential impact on native animals and birds can be found on the Department of Primary Industries, Water and Environment web site at http://www.dpiwe.tas.gov.au/inter.nsf/WebPages/SJON-52J8U3?open