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Published byJulian Harvey Modified over 9 years ago
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Mesic Hammock and Xeric Hammock Alexis Cardas
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Mesic Hammock
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Resources and Conditions: well-developed evergreen hardwood forest moist soil, well-drained prefers fire exclusion can arise in naturally pine-dominated areas cooler, humid climate important to wildlife migratory birds Mesic Hammock
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Distribution and Status: any landscape that offers fire protection patches of oak/palm forest river levees ecotones peninsulas of lakes can occur as “islands” Mesic Hammock
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Dry prairie with a patch mesic hammock River levee
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Peninsula of a lake Ecotone – wetland and surrounding uplands
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Floodplains
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Identification: canopy typically closed dominated by live oak cabbage palm in canopy/subcanopy shrubby understory herb layer sparse to patchy can have an emergent layer of pines (loblolly, slash) Mesic Hammock
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Showing the oak litter, a few cabbage palms, and very sparse herb layer
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Mesic Hammock Showing more of a closed canopy and very dense understory of shrubs
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Identification: Northern hammocks southern magnolia & pignut hickory Southern hammocks spanish moss & ferns gumbo limbo & satinleaf Mesic Hammock
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Southern mesic hammock range Northern mesic hammock range
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Live Oak Cabbage Palm Common Canopy Plants
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Southern Magnolia Pignut Hickory
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Common Canopy Plants Gumbo Limbo Satinleaf
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Resurrection Fern Shoestring Fern Spanish Moss
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Common Understory Plants Saw Palmetto American Beautyberry American Holly
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Common Herb Layer Plants Low Panic Grasses Bracken Fern Witchgrasses
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Rare Plants Auricled Spleenwort Hammock Rein Orchid Pigmypipes
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Rare Animal Species Eastern Diamondback Rattlesnake, Eastern Indigo Swallow-tailed Kite Crested Caracara
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Rare Animal Species Florida Panther Florida Long-tailed Weasel
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Common Animals White-tailed deer Eastern wood rat Raccoon Bobcat Barred Owl Woodcock Florida box turtle Southeastern five-lined skink Florida worm lizard Striped skunk
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Range: Throughout FL peninsula Extends northward to North Carolina Westward through FL panhandle Most common in Central FL Mesic Hammock
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Considerations : disturbance from human activities home sites, camp grounds, recreation areas exotic invasive plants air-potato, rosary pea, Japanese climbing fern, tropical soda apple feral hogs disturb soil and consume large amounts of oak mast fire suppression = more common habitat Mesic Hammock
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Management and Restoration: disturbance from human activity limit development land acquisition landowner agreements restrict off-road vehicles exotic invasive plants frequent hand removal herbicides Mesic Hammock
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Management and Restoration: feral hogs impossible to remove entirely reduce numbers by hunting fire suppression restore natural fire regimes to surrounding habitats infrequent, low intensity fires are appropriate prevents mesic hammock vegetation from spreading Mesic Hammock
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Good sites to visit: Little Big Econ State Forest, Seminole County Three Lakes WMA, Osceola County Highlands Hammock State Park, Highlands County Lake Panasofkee Outlet, Sumter County Mesic Hammock
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Xeric Hammock
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Resources and Conditions: evergreen forest well drained sandy soil very shady habitat fire exclusion derive from sandhill, scrub, or scrubby flatwoods Xeric Hammock
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Distribution and Status: can form extensive stands also occur in smaller patches found on high “islands” within flatwoods well drained ridges barrier islands Xeric Hammock
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Smaller patches within scrub habitat
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Barrier Island Ridges within a floodplain
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Identification: low closed canopy dominated by sand live oak open understory very shady herb layer very sparse soil covered with oak litter emergent pine canopy (sand, slash, longleaf) Xeric Hammock
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Xeric hammock, showing oak litter ground coverage, very open understory, and low canopy of sand live oak
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Common Canopy Plants Sand Live Oak Turkey Oak
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Common Canopy Plants Laurel Oak Ball Moss
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Common Understory Plants Black cherry Rusty Staggerbush Scrub Palmetto
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Common Herb Layer Plants Sandyfield Beaksedge Sweet Goldenrod
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Rare Animal Species Florida Pine Snake Short Tailed Snake Gopher Frog Gopher Tortoise
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Rare Animal Species Cooper’s Hawk Short Tailed Hawk Florida Black Bear
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Common Animals Eastern Screech Owl Turkey Gray Squirrel Eastern Flying Squirrel White-tailed Deer Hognose Snake Barking Tree Frog Red Rat Snake Blue Jay Eastern Mole
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Range: most common in central peninsula corresponds to scrub and sandhill northward into Carolina’s and Mississippi Xeric Hammock
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Considerations: humans enjoy this habitat leads to disturbances feral hogs disturb soil and natural vegetation years of fire exclusion dome of canopy established after only 7-16 years taking over scrub habitat Xeric Hammock
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Management and Restoration: human disturbance limit development land acquisition land owner agreements restrict recreational uses; off-road vehicles feral hogs may be impossible to entirely remove numbers should be reduced by hunting Xeric Hammock
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Management and Restoration: years of fire exclusion restore low intensity winter burning regime to prevent xeric hammock vegetation from spreading taking over scrub habitat only a high, intense fire during dry conditions would be capable of killing the oaks once the canopy is established mechanical removal of oaks herbicides Xeric Hammock
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Good sites to visit: Eglin Air Force Base Troy Springs Conservation Area, Lafayette County Lake Wales Ridge State Forest, Polk County Welaka State Forest, Putnam County Xeric Hammock
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Mesic vs. Xeric Hammock Mesic hammock: moist, well drained soil dominated by live oak large closed canopy very dense shrubby understory can arise in naturally pine dominated areas due to fire exclusion Xeric hammock: well drained sandy soil dominated by sand live oak lower canopy, mostly closed more open shrubby understory typically arise from scrub, sandhills, and scrubby flatwoods due to fire exclusion
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