Jenny Ericson Michael Lusk 2011 <p><span class="searchTerm0">I</span><span class="searchTerm0">nvasive</span> species pose a significant <span class="searchTerm0">challenge</span> to the National Wildlife Refuge System and have been identified as the single most important threat to habitat <span class="searchTerm0">management</span> on refuges. At present, it is estimated that over 2 million acres of refuge lands are invaded by invasive <span class="searchTerm0">plants</span>. The current and potential costs of controlling <span class="searchTerm0">invasive plants</span>, as well as monitoring and restoring refuge lands, are significant both financially and ecologically. Budgetary expenditures for invasive species projects in FY 2009 totaled $18.4 million. A number of strategies are used to confront this threat and have resulted in success on a variety of levels. The Refuge System utilizes key partnerships, <span class="searchTerm0">invasive</span> species strike teams, and a dedicated cadre of volunteers to implement projects that incorporate mechanical, chemical and biological control methods.</p> application/pdf 10.1021/bk-2011-1073.ch007 en American Chemical Society Invasive Plant Management in the United States National Wildlife Refuge chapter