The following information was distributed by Tom Dahl, Senior Scientist, Wetlands Status and Trends, U.S. Fish and Wildlife Service.
The report, Status and Trends of Wetlands in the Coastal Watersheds of the Conterminous United States 2004 to 2009, was released on November 21, 2013 by the U.S. Fish and Wildlife Service and the National Oceanic and Atmospheric Administration. This study tracked wetland changes in the coastal watersheds of the Pacific, Atlantic, and Gulf of Mexico as well as the Great Lakes. It concludes that more than 80,000 acres of coastal wetlands are being lost on average each year, up from 60,000 acres lost per year during the previous study from 1998-2004.
Notable wetland losses were recorded along the Gulf Coast (257,150 acres). The Atlantic Coast lost 111,960 acres and the Pacific Coast 5,220 acres. The watersheds of the Great Lakes region experienced a net gain in wetland area of an estimated 13,610 acres.
In some coastal watersheds, rising ocean levels are encroaching into wetlands from the seaward side, while development from the landward side prevents wetlands from being able to migrate inland. This dual threat squeezes wetlands into an ever smaller and more fragile coastal fringe.
The full report is available for viewing or download at: http://www.fws.gov/wetlands/