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Corkscrew Swamp Sanctuary

 

Located in southwest Florida, Corkscrew Swamp Sanctuary is a unique remnant of the Western Everglades. Corkscrew is comprised of pine flatwoods, wet prairies, cypress swamps, and marshes. The majestic 600-year-old bald cypress trees reach heights of 40 m and comprise the largest remaining virgin bald cypress forest in the world. These tall trees support critical nesting habitat for an endangered bird species. In addition, the sanctuary provides habitat for nearly 200 species of birds, as well as endangered and critically endangered (IUCN) fauna and 22 species of threatened or endangered flora. Part of the site, formerly used as a mitigation bank, covers created/restored marshes, and the area serves as a vital link between several south Florida watersheds. Currently, the site is used for conservation and in limited areas, scientific research and tourism. The site is owned and managed by National Audubon Society.

Exemplary Ecosystem Services

Maintains ecological connectivity/cohesion

Aesthetic/Cultural Heritage Value/Provisioning

Recreation (birdwatching, ecotourism)

Aquifer recharge

Storm abatement

Flood storage/mitigation

Carbon storage

Water quality improvement

Education

Conservation Status and Threats

  • Conservation status

    RAMSAR Designation
  • Adjacent land use

    Agricultural (cropland, orchards, greenhouse)
  • Approximate natural buffer width

    < 5 ft
  • Other Information

    The ecological integrity of this wetland faces a growing host of threats:

    Invasive plants present an ongoing land management challenge and require full-time staff to remove them using mechanical, chemical, and biocontrol methods.

    Fire suppression throughout the region coupled with encroaching development has made efforts to maintain a natural fire regime, through prescribed fire, increasingly challenging.

    Staff have documented a significant loss of ground water in recent decades decreasing hydroperiod across the sanctuary. This water loss threatens to change plant communities, change understory dry season microclimate, and leave the old-growth bald cypress vulnerable to devastating wildfires. Water loss and fire suppression also lead to succession from herbaceous to woody plant species, increasing water loss via evapotranspiration.

    Invasive fauna also present a threat to the ecosystem. Native fish communities have been replaced by non-native fishes in many areas, particularly on the periphery of the sanctuary and in manmade ditches. Redbay ambrosia beetles and other pests are a significant threat. While not yet present in the sanctuary, Burmese pythons and Argentine Black-and-white Tegus have been found in the immediate area and are expected to eventually move into the sanctuary. Feral hogs are present, often in significant numbers, causing soil disturbance, uprooting vegetation, and encouraging the spread of non-native grasses.

    Land use changes throughout the region threaten wildlife, particularly wading birds, foraging throughout the regional landscape, and Florida panthers, who require large areas of home range, safe road crossings, and wildlife corridors.

Ecology

  • Approximate size (ha):

    5261
  • General wetland characterization:

    Inland Fresh Seasonally Flooded Basin/Flat, Inland Fresh Meadow, Inland Shallow Fresh Marsh, Inland Deep Fresh Marsh, Inland Fresh Shrub Swamp, Inland Fresh Wooded Swamp
  • Adjacent water bod(iess)

  • Approximate stream order

  • Name of body of water

  • Surficial geology

    Shelly sediments of Plio-Pleistocene age: Tertiary-Quaternary Fossiliferous Sediments of Southern Florida - Molluskbearing sediments of southern Florida contain some of the most abundant and diverse fossil faunas in the world. Lithologically these sediments are complex, varying from unconsolidated, variably calcareous and fossiliferous quartz sands to well indurated, sandy, fossiliferous limestones (both marine and freshwater). Clayey sands and sandy clays are present. These sediments form part of the surficial aquifer system.

  • Soils

     

    Predominently sands with peat accumulations in depressions, with scattered limerock and shell beds beneath the surface (https://corkscrew.audubon.org/sites/g/files/amh511/f/duever_1976.pdf). 

    Additional information: Custom Soil Resource Report for Collier County Area, Florida, and Lee County, Florida: Corkscrew Swamp Sanctuary Soils

Flora and Fauna

  • Dominant flora

    Botanists have documented 770 species and 773 infrageneric taxa of vascular plants within the sanctuary. Some commonly seen plants include: cypress, slash pine, wax myrtle, cabbage palm, saw palmetto, red maple, goldenrod, swamp lily, bushy bluestem, wiregrass, tickseed, sawgrass, and live oak.
  • Unique flora

    Eighteen taxa at CSS are endemic to Florida, with examples including Aristida patula, Bigelowia nudata subsp. australis, Campanula floridana, Carex vexans, and Carphephorus odoratissimus var. subtropicanus. For the complete list see Wilder and McCollom (2018).
  • Dominant fauna

    Around 200 species of birds inhabit Corkscrew Swamp Sanctuary throughout the year, including anhingas, barred owls, egrets, herons, ibis and limpkins. Other commonly seen animals include alligators, snakes, tree frogs, red-bellied turtles, white-tailed deer, river otters, etc.
  • Rare fauna

    Unique (non-RTE) fauna species found in the sanctuary include Florida Black Bear, North American river otters, gray fox, spotted skunk, Eastern diamondback rattlesnake, coachwhip, and swamp darters.

Gallery

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