O wilson 4 httpwwwcolumbiaeduitccercdanoff

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Unformatted text preview: What’s the big deal? European starlings   "On a global basis...the two great destroyers of biodiversity are, first habitat destruc8on and, second, invasion by exo8c species”  ­ E.O. Wilson 4 http://www.columbia.edu/itc/cerc/danoff-burg/invasion_bio/inv_spp_summ/Sturnus_vulgaris.html What’s the big deal?   An increasing rate of accidental introduc8ons, e.g. North America: o  Up to 1985: •  Approx. 5000 invasive species established •  All taxa (animals, plants, microbes) o  From 1985 ­2000: •  6825 intercep8on records of alien insects in wood products in US alone Cumulative record of discoveries of introduced species in the San Francisco estuary 1850–1995 5 Globaliza8on: increasing the risk of introduced species   Increasing introduc8ons due to: o  All forms of travel o  Freight containers o  Encrusted animals/plants on boats o  Diseases, parasites of pets o  Shipping...
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