History[edit]
Main article: Dry Tortugas
The first European to see the Dry Tortugas was Juan Ponce de León, who visited on June 21, 1513. Ponce de León caught 160 sea turtles there and subsequently referred to the islands as the "Tortugas" (turtles). They are called Dry owing to the absence of surface fresh water on the island. The archipelago includes a high concentration of historically significant shipwrecks dating from the 17th century to the present.[10] The Dry Tortugas were a significant American naval base from colonial times to the early 20th century, providing a sheltered anchorage and coaling station through the Spanish–American War.[11]
Florida was acquired from Spain by the United States in 1822. The Dry Tortugas were seen as a strategic point for the control of the Florida Straits and the Gulf of Mexico. Work on a lighthouse on Garden Key started in 1825. Planning for a fortification began almost immediately, and construction started in 1847. In 1856 work on a new, more powerful lighthouse on Loggerhead Key was started to replace the Garden Key light.[11]
Work was half complete in 1860. Construction continued into the American Civil War, but eventually stopped, and the fort was used as a military prison. It was here that Dr. Samuel Mudd, who was convicted of aiding John Wilkes Booth—the killer of President Abraham Lincoln—was imprisoned. Mudd later was freed after averting a viral outbreak. This use as a military prison continued until 1874.[11] With the introduction of coal-fueled ships, the Dry Tortugas became a coaling station for U.S. Navy ships.
Fort Jefferson[edit]
Main article: Fort Jefferson, Florida
Fort Jefferson is a massive but unfinished coastal fortress. It is the largest masonry structure in the Western Hemisphere,[3][4] and is composed of more than 16 million bricks.
Park history[edit]
Comprising 47,125 acres (19,071 ha), Fort Jefferson National Monument was designated by President Franklin D. Roosevelt under the Antiquities Act on January 4, 1935. The monument was expanded in 1983 and redesignated as Dry Tortugas National Park on October 26, 1992, by an act of Congress.[12][13] Dry Tortugas is managed by the staff of Everglades National Park.[14] The park was established to protect the island and marine ecosystems of the Dry Tortugas, to preserve Fort Jefferson and submerged cultural resources such as shipwrecks, and to allow for public access in a regulated manner.[10]
During the Federal government shutdown of 1995 and 1996, Dry Tortugas was closed along with all other national parks. Seeing this as having a damaging effect on their tourism-dependent economy, the residents of Key West, Florida, raised money to keep Dry Tortugas open. The effort was inspired by the Smithsonian Institution, which raised private donations to keep its museums open during the shutdown.
Failing to find anybody to accept the money to reopen the park, Key West residents, under the auspices of the satirical micronation Conch Republic, sent a flotilla of civilian boats and fire department boats to Fort Jefferson in order to reopen the national park. When officials attempted to enter the fort, they were cited. The citation was contested in court the following year, and the resultant case, The United States of America v. Peter Anderson, was quickly dropped.
The park is a landing location for immigrants arriving from Cuba in homebuilt boats called "chugs." Receiving and housing the migrants is a particular problem for Dry Tortugas, which has limited resources for such arrivals and which is several hours from the nearest Coast Guard or Border Patrol units. Communications with Key West are accomplished using a satellite-based voice-over-IP system, which is prone to garbling and delays, and by a radio relay system using an abandoned Air Force tower between Key West and the Dry Tortugas.[14]
Visitation steadily rose for several decades, reaching a peak of 83,704 in 2000. Since then visitation has slowly declined, and now averages close to 60,000 per year.[2]
Ecology[edit]
The Dry Tortugas are classified as a borderline sub-tropical-tropical ecosystem, hosting species that do not breed or are uncommon anywhere else in the continental United States.
When a cold front along Florida wiped out 96 percent of branching coral in 1976-77, once extensive branching coral formations became rubble fields.[15] The Dry Tortugas National Park now consists of patch reef and branching coral rubble.[15][16]
Birds[edit]
Dry Tortugas National Park has an official bird list of 299 species. Of these, only eight species frequently nest within the park: sooty tern, brown noddy, brown pelican, magnificent frigatebird, masked booby, roseate tern, bridled tern and mourning dove.[17] The park features the only nesting colonies of sooty tern, brown noddy, magnificent frigatebird, and masked booby in the contiguous United States.[7]
Birdwatching activity peaks each spring (usually April) when dozens of migratory bird species can pass through the park in a single day. Many birds land inside the parade grounds of Fort Jefferson where they are often observed at close range. Common migratory warblers include the northern parula, American redstart, prairie warbler, hooded warbler, palm warbler, black-and-white warbler, common yellowthroat, yellow-rumped warbler,ovenbird, northern waterthrush, black-throated blue warbler, blackpoll warbler, and Cape May warbler, with more than 20 additional warbler species having shown up at least once. Several raptor species as well as cattle egretsare often seen hunting songbirds. Until early 2013 a small freshwater fountain existed beneath several seaside mahoe and buttonwood trees, and was the only freshwater source for many miles. Maintenance issues necessitated its removal, but a replacement water barrel is scheduled for installation in the fall of 2013. Each year several bird guides offer tours of Dry Tortugas National Park during April and early May when daily bird lists can often reach 100 or more species.
Invasive species and eradication efforts[edit]
An active eradication program has resulted in the removal of invasive Casuarina trees and agave from Loggerhead Key, by cutting and herbicide treatment. Pterois, commonly known as lionfish, have also been found in the park's waters and the National Park Service is currently reviewing the lionfish management plan to determine what actions to take to manage the spread of this invasive species in Dry Tortugas National Park and Everglades National Park.[18]
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