Plaquemines Parish has a map that charts the areas closed to fishing, crabbing, and oystering along the Louisiana Coast. The State of Louisiana has a site that lists the oil sightings day by day. These are the places where oil has invaded the marshes.
The U.S. Fish and Wildlife Service noted on May 29 that booms were protecting the Delta National Wildlife Refuge. Even so the refuge, where anglers come for freshwater fish close in the fresh marshes to the Mississippi and salt water fish in the brackish marshes close to the Gulf of Mexico, was closed to fishing. Where oil has gotten into the Delta refuge and the Pass a Loutre state wildlife management area, it kills the vegetation, the soil erodes, and the refuge turns to open water. This is an area where the refuges have been working to build land by creating crevasses, breaks in the ridges along the bayous that allow Mississippi water to flow through and deposit sediment in open water, building more land.
On June 17th tar patties were found on Fifi Island, where kids planted vegetation to restore the island in 2006. Fifi has a unique role on the Louisiana coast: it protects Grand Isle from storm surges coming in from Barataria Bay to the north.
The skeletons of live oak trees line the ridge of Grand Bayou, which may protect the marshes along the Mississippi from the oil invasion.
Oil was found on June 24 as far north as Lake Hermitage, where the Louisiana DNR approved a plan to build new marshes in 2007.