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Tuesday, January 26 • 2:40pm - 3:00pm
Mapping and Monitoring Distribution of Phragmites Australis and Treatment Effects At Multiple Scales For Management

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AUTHORS: Laura Bourgeau-Chavez*, MTRI; Sarah Endres, MTRI; Eleanor Serocki, MTRI

ABSTRACT: The invasive phenotype of common reed Phragmites australis (Cav.) Trin. ex Steud. has been an acute detriment to coastal Great Lakes wetlands. It often forms dense, tall (up to 5 m) monotypic stands that degrade habitat for birds, amphibians and fish, reduce biodiversity and diminish ecosystem services. Management (herbicide, burning and mowing) to control this aggressive invader has been implemented across the Great Lakes in many small and large efforts with varying success. Mapping of the distribution of this invader and monitoring treatment areas for effects (e.g. standing dead Phragmites stems, regrowth of the invader or restoration of native plants) are needed for effective management and control. Several successful remote sensing classification techniques at scales of 1 to 30 m have been developed for mapping this invader and the effects of treatment. A medium resolution map (mmu 0.5 acres) was created with satellite radar data for entire U.S. Great Lakes coastline from 2010 three season 10 m resolution PALSAR imagery. While this map is useful from a regional stand point, higher resolution imagery is needed for development of comprehensive distribution maps that clearly show outliers, pathways and invasion sources at a fine enough scale to direct treatment applications to attack leading edges. Such maps have been created for Saginaw Bay and the St. Clair River Delta using RapidEye (5 m) and Worldview-2 (1 m) imagery. Mapping and monitoring is critical to cost-effective prioritization and successful long-term control, but it is often not included in control efforts.

Tuesday January 26, 2016 2:40pm - 3:00pm EST
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