Atlantic Coastal Ridge CARLFF Project (9061 acres; 3666 ha remaining), Atlantic Ridge Preserve State Park (5650 acres; 2286 hectares), City of West Palm Catchment Area (14,592 acres; 5905 hectares), Dupuis Management Area (21,935 acres; 8877 hectares), J.W. Corbett Wildlife Management Area (60,224 acres; 24,372 hectares), Jonathan Dickinson State Park (11,480 acres; 4645 hectares), Loxahatchee Slough Natural Area (10,838 acres; 4335 hectares), Loxahatchee Slough SOR Tract (1426 acres; 570 hectares), and the Pal-Mar CARLFF Project (35,409 acres [14,330 hectares], 12,737 acres [5154 hectares] acquired)

Ornithological Summary

Significant populations of Endangered, Threatened, Special Concern, and FCREPA species; significant numbers of wading birds; and significant natural habitats

The Palm Beach County Solid Waste Authority Conservation Area has served as a critical refuge for Snail Kites, and also contains a very large wading bird rookery. Jonathan Dickinson State Park supports the largest population of Florida Scrub-Jays in the region. Pine flatwoods at the State Park and at Corbett Wildlife Management Area support Hairy Woodpeckers and Bachman?s Sparrows, species now rare and local in the region. Corbett also supports a nearly significant populations of Red-cockaded Woodpeckers, which represents the southernmost population in southeastern Florida. Red-cockade Woodpeckers became extirpated from Jonathan Dickinson State Park in 1982. Overall diversity, based solely on Jonathan Dickinson State Park, is 141 native species, which certainly is a significant underestimate of the diversity within the IBA.

Conservation Issues

*development, *habitat succession, *exotic plants, altered hydrology

The ?Treasure Coast? is under massive development pressure, especially areas near the coast. The State has targeted a large area of privately owned land immediately north of Jonathan Dickinson State Park for public acquisition. So far about 40% of the acreage has been obtained, which is now known as Atlantic Ridge Preserve State Park. Efforts are ongoing to protect the remaining acreage, but some small sites have already been developed. ? The wading bird rookery at the Palm Beach County Solid Waste Authority is located on small spoil islands in an abandoned shell pit. All the vegetation on the islands are composed of invasive exotic plants, but these are not removed in order to avoid disturbing the rookery. However, exotics elsewhere on the property are controlled. The entire conservation area is fenced off against human intrusion. Bird use of the area is monitored regularly. ? Jonathan Dickinson State Park contains about 2225 acres of scrub, most of which is sand pine scrub that cannot support Florida Scrub-Jays. The park management (Timmerman 1994 in +Pranty 1996b) set a goal of managing 1100 acres to support 40 Florida Scrub-Jay groups. Current numbers are only 60?75% of this total, however. Jonathan Dickinson State Park is critical to maintain a viable population of scrub-jays in the region. ? Reduced freshwater flow into the Loxahatchee River has allowed saltwater to move upstream, which has changed some cypress swamps into mangrove forests. ? Exotic plants such as Brazilian pepper and Old World climbing fern are problems in some areas.

Ownership

Florida Department of Environmental Protection (Atlantic Ridge Preserve State Park, Jonathan Dickinson State Park), Florida Fish and Wildlife Conservation Commission (J.W. Corbett Wildlife Management Area), South Florida Water Management District (Dupuis Management Area, Loxahatchee Slough SOR Tract), Palm Beach County Department of Environmental Resource Management (Loxahatchee Slough Natural Area), West Palm Beach (Grassy Waters Preserve), and private owners (remaining acreage of the Atlantic Coastal Ridge CARL?FF Project and the Pal-Mar CARL?FF Project)

Habitat

*slash pine flatwoods, *sawgrass marsh, *freshwater marsh, sand pine scrub, sandhill, maritime hammock, xeric oak scrub, estuarine, riverine, lacustrine, abandoned shell pits, artificial

Land Use

*conservation, *recreation, *water storage and supply, environmental education, hunting

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