The Invasive Spartina Project is a coordinated regional effort among local, state and federal organizations dedicated to preserving California's extraordinary coastal biological resources through the elimination of introduced species of Spartina. Cordgrasses are highly aggressive invaders that significantly alter both the physical structure and biological composition of our tidal marshes, mudflats and creeks. The control program is the "action arm" of the San Francisco Estuary Invasive Spartina Project, a project of the conservancy. The program uses an Integrated Vegetation Management (IVM) approach to prioritize and implement control efforts.