Conservation Bio Main Points 10-03-2007

Conservation Bio Main Points 10-03-2007 - Conservation Bio...

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Conservation Bio Main Points 10-03-07 Invasive Species and Genetically Modified Organisms (Chapter 9) What is an invasive species? o Species in an environment in which they did not evolve and have no enemies to stop their spread and reproduction o Aka aliens, exotics, non-natives Causes o Human movement: Bring lots of junk with them o Horticulture and agriculture o Accidental: Ballasts of ships, up to 150,000 tons of water, off coast of Oregon one ship found with 367 species of marine organisms native to Japan were found o To curb the ballast problems ships are required to dump and change ballast 320 km offshore o Biological control: Introduce species to control pests The threat o 5,000 exotic plants and 5,000 exotic animals and microbe species in U.S. Each year invasive species cost the US economy over $130 billion o 50% of all agricultural weeds are non native to the U.S., as are 40% of agricultural and forestry pests o 42% of endangered species are threatened by invasive species
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This note was uploaded on 04/17/2008 for the course E&EB 115 taught by Professor Jeffreypowellmartawells during the Fall '07 term at Yale.

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Conservation Bio Main Points 10-03-2007 - Conservation Bio...

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