Florida Everglades

Florida Everglades. This vast subtropical wilderness, often called the "River of Grass," is a unique network of wetlands and forests fed by a slow-moving sheet of water flowing south from Lake Okeechobee to the Florida Bay. Encompassing the southern third of the Florida peninsula, the region includes the expansive Everglades National Park, the Big Cypress National Preserve, and numerous state-managed water conservation areas. Its singular landscape and immense biodiversity have made it a focal point for global conservation efforts and a designated International Biosphere Reserve.

Geography and hydrology

The fundamental geography is defined by a shallow, slow-moving river, often just inches deep but up to 60 miles wide, flowing over a limestone shelf. This sheetflow originates from the Kissimmee River basin, drains into the vast Lake Okeechobee, and then seeps southward across a nearly flat landscape. The underlying geology features porous Biscayne Aquifer, a critical freshwater source for southeastern Florida. Distinct ecosystems form along this hydrological gradient, including vast sawgrass marshes, deeper-water slough channels like Shark River Slough, and elevated tree islands known as hammocks. The southern terminus of the system interfaces with the saline waters of Florida Bay and the Gulf of Mexico, creating extensive coastal mangrove forests and estuaries.

Ecosystem and biodiversity

This "River of Grass" supports a mosaic of interdependent habitats with exceptional species richness. It provides crucial habitat for numerous threatened and charismatic species, including the Florida panther, the American alligator, and the West Indian manatee. The region is a major birding destination, hosting vast numbers of wading birds such as the roseate spoonbill, the wood stork, and the great blue heron, particularly within the renowned Anhinga Trail. The marine environments of Florida Bay and the Ten Thousand Islands are vital nurseries for fish and shellfish, while the pinelands and hardwood hammocks support unique flora like the ghost orchid. The interplay between freshwater and saltwater creates a dynamic ecotone of immense productivity.

Human history and impact

For millennia, the region was inhabited by Native American tribes, most notably the Miccosukee and the Seminole, who adapted to the wetland environment. Significant modern alteration began in the late 19th and early 20th centuries with ambitious drainage projects promoted by figures like Napoleon Bonaparte Broward, aiming to convert land for agriculture and development. The Army Corps of Engineers constructed an extensive system of canals, levees, and water control structures, such as the Herbert Hoover Dike around Lake Okeechobee, which fragmented the natural sheetflow. This engineering, coupled with the growth of major urban centers like Miami and Fort Lauderdale, dramatically reduced the historic Everglades ecosystem to approximately half its original size and profoundly altered its hydrology.

Conservation and restoration

Recognition of the ecosystem's decline led to the establishment of Everglades National Park in 1947, championed by advocates like Marjory Stoneman Douglas, author of *The Everglades: River of Grass*. The landmark Comprehensive Everglades Restoration Plan (CERP), authorized by the United States Congress in 2000, represents the largest hydrological restoration project in American history, a joint effort between the Army Corps of Engineers and the South Florida Water Management District. Key projects include the Kissimmee River Restoration and the construction of massive engineered wetlands like the C-44 Reservoir and Stormwater Treatment Area. These efforts aim to "get the water right" by restoring more natural flow patterns, timing, and water quality to the remnant ecosystem.

Environmental threats

The system faces persistent and severe threats, primarily from altered water quantity and quality. Nutrient pollution, particularly from agricultural runoff containing phosphorus and nitrogen, fuels algal blooms and damages native plant communities like sawgrass. Encroaching sea level rise due to climate change drives saltwater intrusion into freshwater aquifers and marshes. Invasive exotic species, such as the Burmese python and the melaleuca tree, disrupt native food webs and habitat structure. Furthermore, continued urban and agricultural demand for water from the Biscayne Aquifer competes directly with the ecological needs of the remaining wetlands, creating a persistent management challenge for agencies like the Florida Fish and Wildlife Conservation Commission.

Category:Everglades Category:National parks in Florida Category:Wetlands of the United States Category:Ramsar sites in the United States