Biological Invasions: Economic and Environmental Costs of by David Pimentel Ph.D.

By David Pimentel Ph.D.

Organic Invasions assembles targeted info on parts of the invasive-species challenge from six continents. This quantity reconfirms the various and unpredictable roles that non-native species suppose as they invade new ecosystems: destruction of important vegetation and forests, significant damages to ecosystems resulting in lack of biodiversity, soil erosion, and water loss. furthermore, it covers the effect of affliction organisms on human overall healthiness and cattle. info is equipped on how the non-native species invade new ecosystems and the following environmental results of those invading species. anywhere attainable, estimates at the fiscal affects of the invading species are integrated.

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Additional resources for Biological Invasions: Economic and Environmental Costs of Alien Plant,Animal,and Microbe Species

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Research sometimes occurs only when the impacts of aliens have been recognized and even quantified. Future research and management should be aimed equally at those species only recently introduced or naturalized, before their negative or positive effects are expressed fully. Increased collation of knowledge of such species worldwide would help to identify any species not yet present in Australia on which quarantine and research should focus. After all, about the only generalization presently tenable is that if the alien has a negative impact elsewhere, it will most probably have a similarly negative effect if introduced to Australia.

The distribution and abundance of many species of birds and other animals will be seriously affected if rabbits cause a long-term decline in tree and shrub populations in the rangelands. Rabbits occur on 48 Australian islands, and their environmental impacts there can be catastrophic. Rabbits introduced onto Phillip Island caused the extinction of an endemic parrot (Nestor productus) and two endemic plants and severely reduced other vegetation. Since the eradication of rabbits on Phillip Island in 1986, the vegetation has shown considerable recovery.

A. , Perth, 1956. 40. , Poisonous Plants of Australia, Angus and Robertson, Sydney, 1974. 41. , Effects of Hypericum perforatum (St. John’s wort) on animal health and production, Pl. Prot. , 12, 91–92, 1997. 42. , Government Printer, Wellington, 1977. 50 © 2002 by CRC Press LLC 25 26 Biological Invasions Abstract At least 80 species of non-indigenous vertebrates have established wild populations in Australia, and more than 30 of these species have become pests. Direct short-term economic losses caused by these species amount to at least $420 million per year, mainly in lost agricultural production.

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