Florida Bay Monitoring Program

Florida Bay
The complicated interplay of currents, tides, winds and weather, topography, water density, salinity, and other physical and chemical factors makes for constantly changing conditions in Florida Bay.

NPS photo by Lori Oberhofer

Florida Bay is a large (approximately 2,200-square-kilometer), shallow lagoon bounded to the north by the Florida peninsula and to the south and east by the Florida Keys (see map below). Though connected to the Gulf of Mexico to the west, a series of shallow banks, typically covered with and stabilized by seagrass communities, limits the exchange of water between the gulf and the bay. These banks separate the bay into basins, each with its own physical characteristics. These basins provide unique habitat for many plants, invertebrates, fishes, birds, mammals, and reptiles, including several threatened or endangered species such as the Florida manatee (Trichechus manatus latirostris) and species of special concern such as the roseate spoonbill (Platalea ajaja).

Duck Creek monitoring station in Florida Bay
Duck Key monitoring station in Florida Bay.

NPS photo by Steven Tennis

Approximately 1,625 square kilometers of Florida Bay are located within Everglades National Park and protected by the National Park Service, while the remainder lies within the Florida Keys National Marine Sanctuary and falls under the jurisdiction of the National Oceanic and Atmospheric Association. In order to preserve and protect Florida Bay, managers at Everglades National Park needed to improve their understanding of how the hydrologic system affects the ecosystem. To that end, in 1988 the National Park Service installed hydrologic monitoring stations in the bay and in the upstream freshwater marshes of the park. Collected data, including conductivity (used to calculate salinity), water temperature, water level, and rainfall measurements, are transferred in near real-time and electronically archived. The monitoring network was expanded to its current size of 17 stations in 1995.

The report Salinity and Hydrology of Florida Bay: Status and Trends 1990–2009 provides a summary and analysis of collected data. The technical analysis supports National Park Service efforts toward understanding the physical coastal environment of Everglades National Park. This knowledge enhances the ability of the Service to meets its responsibility for preserving our nation's natural and cultural resources while engaging in ecosystem restoration efforts in south Florida. The results establish the spatial and temporal variability in the coastal environment, providing guidelines for detecting change and assessing the effectiveness of resource management projects in meeting the park's long-term objectives.

Location of monitoring stations in Florida Bay
Location of monitoring stations, freshwater canals and structures, and ecological zones in the Florida Bay study area.

Salinity and Hydrology of Florida Bay report cover

Salinity and Hydrology of Florida Bay: Status and Trends 1990-2009 This newly released report focuses on factors that influence salinity, which is recognized as the primary driver of ecological conditions in Florida Bay. Download the report here (PDF, 3.7 MB).

Last updated: February 14, 2018

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40001 State Road 9336
Homestead, FL 33034-6733


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