Crawling Out of the Pipe: The hazardous waste that makes more of itself

Bioinvasion, the spread of non-native "exotic" species, may be the least visible and least predictable of all the major dimensions of ecological decline. It is also one of the most dangerous, because exotics often create pressures for which there is no local evolutionary precedent: native species simply may not be adapted to live with the invaders. The result, increasingly, is widespread suppression of natives and sometimes extincti0n. As a threat to global biological diversity, bioinvasion may now be surpassed by only the the broadest category of environmental decline, habitat loss.
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