A resource for people and their environment
A new tool to view sea-level rise simulations is available
Migratory birds nesting habitats could be affected by sea-level rise. Credit: Leopoldo Miranda / USFWS
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As the globe warms and polar ice caps melt, sea levels rise, causing the flooding of coastal marshes, important for wintering mallard ducks, and eroding coastal beaches, vital as refueling stops for migrating song birds.
To plan for sea-level rise, the National Wildlife Refuge System uses various models to understand how advancing seas will affect coastal marshes, tidal flats, beaches and swamps. Among these models, the workhorse is SLAMM – Sea Level Affecting Marshes Model – which has been used extensively since 2006. Similar to a weather forecast, SLAMM is a useful tool to forecast habitat transformations as sea levels rises.
Visit our SLAMM-view page to find out more, and see how sea-level rise will affect your community.
Scientists Discover Intersex Fish More Widespread
Smallmouth bass. Illustration by Timothy Knepp, USFWS.
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Annapolis, Maryland - A recent study of intersex abnormalities in fish conducted by researchers from the U.S. Fish and Wildlife Service and the U.S. Geological Survey in the Potomac River watershed showed that at least 82 percent of male smallmouth bass and in 23 percent of the largemouth bass had immature female germ cells (oocytes) in their reproductive organs.
This condition, a type of intersex, is a disturbance in the fish’s hormonal system and is an indicator of exposure to estrogens or chemicals that mimic the activity of natural hormones. Several other abnormalities were also noted, some affecting female bass.
“At the moment we don’t know the ecological implications of this condition and it could potentially affect the reproductive capability of important sport fish species in the watershed,” said Leopoldo Miranda, Supervisor of the U.S. Fish and Wildlife Service’s Chesapeake Bay Field Office.
For more information . .
New Report Shows Annual Loss of 59,000 Acres of Wetlands in Coastal Watersheds
While the nation as a whole gained wetlands from 1998 to 2004, a new report by the U.S. Fish and Wildlife Service and the National Oceanic and Atmospheric Administration documents a continuing loss of vital wetlands in coastal watersheds of the eastern United States.
The new report, Status and Trends of Wetlands in the Coastal Watersheds of the Eastern United States, shows an annual loss of 59,000 acres of wetlands in coastal watersheds of the Atlantic, Gulf of Mexico, and Great Lakes from 1998 to 2004.
Coastal wetlands are the nurseries for important commercial and recreational fish and are vital to many threatened and endangered species. They also provide natural protection for coastal areas from the most damaging effects of hurricanes and storm surges.
Through programs like Partners for Fish and Wildlife and the Coastal program, the Chesapeake Bay Field Office is restoring a variety of coastal habitats. One such project, restored 450 acres of salt marsh by plugging mosquito grid ditches at E.A.Vaughn Wildlife Management Area (WMA), located in Worcester County in the Maryland Coastal Bays region.
Read more about this exciting project . . .
The Department of Interior Supports Native Oyster Restoration
UPDATE! 4/4/09
Crassostrea ariakensis.
Photo by Julie Slacum, USFWS
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The decrease in the native Eastern oyster (Crassostrea virginica) in the Chesapeake Bay can be attributed to three major factors: over-harvesting, disease, and habitat loss. Due to the decrease in native oysters, the states of Maryland and Virginia proposed the introduction of a non-native species of oyster (Crassostrea ariakensis) into the Chesapeake Bay.
In response to this proposal, the U.S. Congress directed the U.S. Army Corps of Engineers to prepare a Programmatic Environmental Impact Statement (PEIS). A series of alternatives to this introduction were proposed ranging from taking no action at all, to introducing the non-native oysters and discontinuing native oyster restoration.
The Department of the Interior has reviewed the Draft Programmatic Environmental Impact Statement (DPEIS) for Oyster Restoration in the Chesapeake Bay, Including the Use of a Native and/or Non-native Oysters and provided the following summary comments:
The Department remains concerned that if the preferred alternative in the final EIS includes the use non-native Suminoe oyster it is unlikely that the goal to restore the ecological and economic function of the Native oyster could be achieved. In addition, use of non-native Suminoe oyster alternatives will permanently interfere with restoration efforts using the native Eastern Oyster.
The Department believes that the best strategies for restoring the function of native Eastern oysters are to use a combination of native Eastern oyster alternatives identified in the PEIS. This combination includes expanding oyster restoration using native Eastern oysters, expanding native Eastern oyster cultivation in aquaculture in both Virginia and Maryland, and expansion of native Eastern oyster sanctuaries, coupled with greater enforcement of sustainable harvest limits.
A PDF copy of the letter is available here.
CBFO's Field Supervisor responds to the Washington Post article "Oyster Decision Could Alter the Bay" (2/15/09).
Restoring the Resources
 Credit: USFWS |
Along the Mispillion River in Kent County, Delaware, an eroded, degraded marsh has been transformed into vital habitat for local wildlife. The 56-acre private site consists of one of the river’s original meanders and associated wetland with more than 2,000 feet of river frontage. On October 2, representatives from the public-private partnership that made the project possible gathered to celebrate its success with a tour of the site.
This restoration, which was completed in June, is a Natural Resource Damage Assessment and Restoration (NRDAR) project for the DuPont Newport Superfund Site located in Wilmington, Delaware. The Trustees, Delaware Department of Natural Resources and Environmental Control (DNREC), National Oceanic and Atmospheric Administration (NOAA), and the U.S. Fish and Wildlife Service (US FWS), were authorized to recover damages to trust resources associated with a release of a hazardous waste at the NewPort site. Read more . . .
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