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The Ecology of Hydric Hammocks - USGS National Wetlands ...

The Ecology of Hydric Hammocks - USGS National Wetlands ...

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PAGE4. Title and Subtitle<strong>The</strong> <strong>Ecology</strong> <strong>of</strong> <strong>Hydric</strong> <strong>Hammocks</strong>:a Community Pr<strong>of</strong>ile2. 3. Rac~piant's Accesston No.I7. Author(s)Susan W. Vince, Stephen R. Humphrey, and Robert W. Simons9. Performing Organization Name and AddrassAuthor Affiliation:Florida Museum <strong>of</strong> Natural HistoryUniversity <strong>of</strong> Florida--I8. Psrtormlng Organization Rept. No.10. Pmiect/Task/Work Unit No.t11. Contract(C) or Grant(G) No.(C)t ~ S ~ i r i Organiratlon n e Name and AddressU.S. Department <strong>of</strong> the InteriorFish and Wildlife Service<strong>National</strong> Wet1 and Research CenterWashington. DC 2024015. supplementary Notes16. Abstract (Limit: 200 words)This publication describes the nature and dynamics <strong>of</strong> a type <strong>of</strong> forestedwetland called hydric hammock. <strong>Hydric</strong> hammock has not been carefullydefined or studied, and it <strong>of</strong>ten is ignored or lumped with other mixedhardwood forests. <strong>Hydric</strong> hammock occurs at low elevations along the gulfcoast <strong>of</strong> Florida from Aripeka to St. Marks and at various inland sites inFlorida. <strong>The</strong> largest contiguous tracts occur along the gulf coast and theSt. Johns River. Sites typically are gentle slopes between mesic hammockor pine flatwoods and river swamp, wet prairie, or marsh. <strong>Hydric</strong> hammocksoccur on soils that are poorly drained or have high water tables, andoccasional flooding saturates the soils long enough to restrict or modifyspecies composition. <strong>Hydric</strong> hammocks typically contain live and swamp1 aurel oaks (Quercus virginiana and Qoercus 1 aurifo 1 ia) , cabbage palm(Sabal pa7metto), southern red-cedar (Juniperus silicicola), sweetgum(Liquidambar styraciflua), and hornbeam (Carpinus caroliniana). <strong>Hydric</strong>hammocks lack certain tree species while sharing others with both upslopemesic forests and downslope swamp forests. <strong>The</strong> vertebrate fauna containsno unique species but has a high diversity <strong>of</strong> species and high abundance<strong>of</strong> selected species. <strong>Hydric</strong> hammocks are particularly important habitatfor game species and for overwintering passerine birds.17. Document Analysis 8. Deacdptonforested wet1 and 1 imestone l inkageFl orida fire plant-animal interactionsinundationgame an i ma1 swater tablepasserine birds(G)!ic. COSATI FitldlGroup16 Ava~labllity StatementUnlimited distribution19. Securrty Class CThas Report)Unclassified20. Seeurtty Class Vhis Page)Unclassified21. No <strong>of</strong> Pagesix + 81n. Pnce(See ANSI-239.18) OPTIONAL FORM 272 (4-77)(Fomnrly NTIS-35)

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