Dr Bradley - NRC 100 Guest Speaker Dr Bradley September...

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NRC 100 Guest Speaker: Dr. Bradley September 28 th , 2010 Plant Invasions and Climate Change What is an Invasive Species? o Sometimes they invade into areas with no competition they can expand o Non-native o Capable of surviving without direct help from people (naturalized) o Spreading away from sites of initial establishment o Often with negative ecological and economic consequences. Examples of Invasive Species: Burning Bush Asian Longhorn Beetle Oriental Bittersweet Why should we worry about Invasive Species? o ~40 billion dollars per year spent directly Reduced crop and rangeland yield Control costs o Unknown amount of billions of dollars per year indirect costs Increased fires Topsoil loss Water loss o Loss of native species Reduces biodiversity, extinctions Why are Invasive species here? o We brought the invasive species here intentionally. Kudzu (from soil erosion) Water hiazon Python invasion in Florida o Also brought them accidentally. Cheap Grass
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Dr Bradley - NRC 100 Guest Speaker Dr Bradley September...

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