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Phragmites australis maps and change, Delta National Wildlife Refuge, Louisiana (2011, 2013, 2016)


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Dugas, J.L., SooHoo, W.M., Enwright, N.M., and Couvillion, B.R., 2018, Phragmites australis maps and change, Delta National Wildlife Refuge, Louisiana (2011, 2013, 2016): U.S. Geological Survey data release,


This U.S. Geological Survey Data Release includes maps of Phragmites australis coverage within the Delta National Wildlife Refuge (NWR), located on the eastern half of the Mississippi River Delta in south Louisiana, for 2011, 2013 and 2016. While the objective of this mapping effort was to map the presence of P. australis, the map also includes coverage of water and non-P.australis land areas (e.g., non-P. australis emergent marsh with scrub/shrub, developed, etc.) and water (e.g., open water, submerged aquatic vegetation, floating aquatic vegetation, and nonpersistent wetlands). This data release also includes maps that show spatial change in P. australis coverage between mapping efforts. This specific dataset is a map of P. australis [...]


Point of Contact :
Brady Couvillion
Originator :
Jason Dugas, William M Soohoo, Nicholas M Enwright, Brady Couvillion
Metadata Contact :
Jason Dugas
USGS Mission Area :
SDC Data Owner :
Wetland and Aquatic Research Center
Distributor :
U.S. Geological Survey - ScienceBase

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“Phragmites australis maps and change, Delta National Wildlife Refuge, Lousiana”
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Original FGDC Metadata

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Coastal wetlands are dynamic ecosystems due to their position at the land-sea interface. Storms, waves, tides, currents, and relative sea-level rise are powerful forces that influence wetland coverage and condition. Coastal wetlands provide numerous valuable ecosystem goods and services including providing fish and wildlife habitat, wave attenuation, reduction in effects of storm surge, carbon sequestration, and recreation. Thus, coastal managers are keenly interested in monitoring the status of coastal wetlands over time. Recently, coastal managers have noted extensive dieback of P. australis in the Mississippi River Delta, particularly between 2015 and 2017. During this same period, coastal managers have also noted evidence of Phragmites scale (also known as Roseau cane mealy bug), an invasive species from Asia, in P. australis in this Mississippi River Delta. Researchers from Louisiana State University have begun to research the scale as it could be one factor contributing to this dieback. In response, the U.S. Geological Survey, Wetland and Aquatic Research Survey has partnered with the U.S. Fish and Wildlife Service to produce detailed of P. australis and other general land cover (non-P. australis land and water) maps for 2011, 2013, and 2016 and assess spatial change in coverage between mapping efforts. This dataset will serve as these valuable snapshots to study recent and future changes of these critical wetlands.

Additional Information


Type Scheme Key
DOI doi:10.5066/F7K936RG

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