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Invasive Species in Washington

Non-native invasive plant and animal species cause significant economic impact to property owners, farmers and ranchers, people involved in aquaculture and fisheries, and others as a result of reduced yields and the cost of control/eradication efforts. There are also tremendous environmental impacts. Invasive species have been identified as a threat to more than 25% of the state’s plant species that are of conservation concern. Aquatic nuisance species have been identified as the second leading threat to diversity within Puget Sound. 

Repeated from the 2007 State of Washington Natural Heritage Plan

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