Florida scrub

Coordinates: 28°00′N 81°45′W / 28°N 81.75°W / 28; -81.75

Florida scrub

Ecology
Biome tropical and subtropical coniferous forest
Borders Southeastern conifer forests
Bird species 173[1]
Mammal species 43[1]
Geography
Area 3,900 km2 (1,500 sq mi)
Country United States (Florida)
Conservation
Conservation status Critical/Endangered[2]
Global 200 No[3]
Habitat loss 33.498%[1]
Protected 34.94%[1]

Florida scrub is an endangered subtropical forest ecoregion found in northern Florida in the United States.[4] It is found on coastal and inland sand ridges and is characterized by a evergreen xeromorphic plant community dominated by shrubs and dwarf oaks. Because the low-nutrient sandy soils do not retain moisture, the ecosystem is effectively an arid one. Wildfires infrequently occur in the Florida scrub. Most of the annual rainfall (about 135 cm or 53 in) falls in summer. It is endangered by residential, commercial and agricultural development, with the largest remaining block in and around the Ocala National Forest. Lake Wales Ridge National Wildlife Refuge also holds a high proportion of remaining scrub habitat, while the Archbold Biological Station near Lake Placid contains about 20 km2 (7.7 sq mi) of scrub habitat and sponsors biological research on it.

Plant communities

There is a high level of endemism in the flora and fauna, including an estimated 40 species of plants, 4 vertebrates and at least 46 species of arthropod found nowhere else.

Florida peninsula inland scrub

Florida peninsula inland scrub is the plant community for which this ecoregion is named. Clumps of sand pines (Pinus clausa) constitute the canopy.[5] Common plant species include sand live oak (Quercus geminata), myrtle oak (Q. myrtifolia), sandhill oak (Q. inopina), Chapman oak (Q. chapmanii), Florida rosemary (Ceratiola ericoides),[2] scrub palmetto (Sabal etonia), saw palmetto (Serenoa repens), garberia (Garberia heterophylla), fetterbush lyonia (Lyonia lucida), rusty staggerbush (L. ferruginea), cup lichens (Cladonia spp.),[6] scrub holly (Ilex opaca var. arenicola), devilwood (Osmanthus americanus var. megacarpus), flag-pawpaw (Asimina obovata), silk bay (Persea humilis), Adam's needle (Yucca filamentosa), and eastern prickly pear (Opuntia humifusa).[7]

Longleaf pine sandhill

Florida longleaf pine sandhills are often found adjacent to the scrub. They consist of stands of longleaf pine (Pinus palustris) on very well-drained, sandy hills. These stands are maintained by frequent fires. Turkey oak (Quercus laevis) is common in the understory and pineland threeawn (Aristida stricta) makes up the ground layer.[8]

Oak dome and hammock

The southern coastal plain oak dome and hammocks occur as thick stands of evergreen oaks in small patches on shallow depressions or slight hills. These forests are distinct from their surrounding habitats, which are often dominated by longleaf pine. On mesic sites, common species are southern live oak (Quercus virginiana), sand laurel oak (Q. hemisphaerica), and American persimmon (Diospyros virginiana). The understory is sparse, with trumpet creeper (Campsis radicans) and greenbriers (Smilax spp). On xeric sites, common species are sand live oak (Quercus geminata), southern live oak (Q. virginiana), longleaf pine (Pinus palustris), pineland threeawn (Aristida stricta), and southern dawnflower (Stylisma humistrata).[9]

Highlands freshwater marsh

Floridian highlands freshwater marshes are highland marshes found in shallow peat-filled valleys, the basins of dried lakes, and the borders of existing lakes. The vegetation mosaic includes a range of mostly herbaceous plant communities, varying based on water depth. Deep water supports various submerged and floating plants. Meter-deep water supports emergent herbaceous perennial plants, typically in dense, monospecific stands, such as bulrush (Typha latifolia), pickerelweed (Pontederia cordata), and American lotus (Nelumbo lutea). Shallow areas submerged only during the wet season support more grasses, including maidencane (Panicum hemitomon) and southern cutgrass (Leersia hexandra). Subsidence and drainage pattern changes make these habitats shift and change over time. Soils can be mucky, loamy, or sandy, but they are generally above permeable subsoils that create standing water much of the year. These marshes may also be called meadows or prairies.[10]

Nonriverine basin swamp

Southern coastal plain nonriverine basin swamps occur in large, seasonally-flooded depressions away from rivers. Sites are often forested in trees such as bald cypress (Taxodium distichum), swamp tupelo (Nyssa biflora), and sometimes slash pine (Pinus elliottii). Characteristic shrubs include buckwheat tree (Cliftonia monophylla), swamp cyrilla (Cyrilla racemiflora), laurelleaf greenbrier (Smilax laurifolia), and fetterbush lyonia (Lyonia lucida).[11]

Animals

Notable animals of the Florida scrub include the Florida scrub jay (Aphelocoma coerulescens), Florida mouse (Podomys floridanus), sand skink (Neoseps reynoldsi), bluetail mole skink (Plestiodon egregius lividus), Florida scrub lizard (Sceloporus woodi), and Florida worm lizard (Rhineura floridana).[4]

Notes

  1. 1 2 3 4 Hoekstra, J. M., et al. (2010). The Atlas of Global Conservation: Changes, Challenges, and Opportunities to Make a Difference. Ed. J. L. Molnar. Berkeley: University of California Press. ISBN 978-0-520-26256-0
  2. 1 2 "Florida sand pine scrub". Terrestrial Ecoregions. World Wildlife Fund. Retrieved 2011-12-01.
  3. ↑ Olson, David M.; Eric Dinerstein (2002). "The Global 200: Priority Ecoregions for Global Conservation" (PDF). Annals of the Missouri Botanical Garden. 89: 199–224. doi:10.2307/3298564.
  4. 1 2 World Wildlife Fund (2001). "Florida sand pine scrub". WildWorld Ecoregion Profile. National Geographic Society. Archived from the original on 2010-03-08. Retrieved 2009-01-20.
  5. ↑ "Florida Scrub". The Croc Docs. Fort Lauderdale Research and Education Center. Retrieved 2009-01-20.
  6. ↑ "Florida Peninsula Inland Scrub". NatureServe Explorer. NatureServe. Retrieved 2009-01-20.
  7. ↑ "Plants of the Florida Scrub". The Florida Scrub. Floridata. Retrieved 2009-01-20.
  8. ↑ "Florida Longleaf Pine Sandhill". NatureServe Explorer. Retrieved 17 January 2013.
  9. ↑ "Southern Coastal Plain Oak Dome and Hammock". NatureServe Explorer. Retrieved 17 January 2013.
  10. ↑ "Floridian Highlands Freshwater Marsh". NatureServe Explorer. Retrieved 17 January 2013.
  11. ↑ "Southern Coastal Plain Nonriverine Basin Swamp". NatureServe Explorer. Retrieved 17 January 2013.

External links

External links

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