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Written by Jeanne Roberts
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Thursday, 19 June 2008 |
Call them what you will, alien invaders, invasive species, or just aliens, these ecological-niche invaders are increasingly present in ecosystems on land and in water, and increasingly difficult to eradicate because they always seem to thrive, even when displaced, and frequently feed on - or otherwise eradicate - native populations.
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Last Updated ( Monday, 23 June 2008 )
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