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Unformatted text preview: 1 IV. Threats to Biodiversity A.Habitat destruction B. Introduced species C. Overexploitation Introduced species (exotics) Species that humans have moved from the native locations to new geographic regions Sometimes - benign Sometimes - disrupt adopted community - invasive Cane Toads ( Bufo marinus ) Native to Americas, introduced into Australia 1935 Control cane beetle, sugar cane pest Was not effective, became pest itself Eats native wildlife, kills its own predators European starling Introduced to Central Park 1890 May out-compete cavity nesting birds for nest- sites Mainly nuisance 2 Argentine ants Are the little ants in your kitchen From Argentina Live anywhere in SoCal that humans add a little water to the environment Displace nearly all of the dozen or so native ant species that would normally occupy this area Zebra mussel Native to Russia; 1st seen in Great lakes in 1988 Probably were introduced in ships’ ballast water in St Lawrence seaway Outcompete native mussels for food...
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This note was uploaded on 12/02/2009 for the course ECON econ taught by Professor For got during the Spring '09 term at UCSD.
- Spring '09
- for got