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Music video by Rihanna performing Take A Bow. YouTube view counts pre-VEVO: 66288884. (C) 2008 The Island Def Jam Music Group.
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Music video by Taylor Swift performing Back To December. (C) 2011 Big Machine Records, LLC.
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|Appalachian-Blue Ridge forests|
View from the Blue Ridge Parkway in North Carolina
|Biome||Temperate broadleaf and mixed forests|
|Borders||Northeastern coastal forests, Allegheny Highlands forests, Appalachian mixed mesophytic forests and Southeastern mixed forests|
|Area||159,300 km2 (61,500 sq mi)|
The Appalachian-Blue Ridge forests is an ecoregion in the Temperate broadleaf and mixed forests Biome, in the Eastern United States. The ecoregion is found in the central and southern Appalachian Mountains, including the Ridge-and-Valley Appalachians and the Blue Ridge Mountains. It covers an area of about 61,500 square miles (159,000 km2) in: northeast Alabama and Georgia, eastern Tennessee, western North Carolina, Virginia, Maryland, and central Pennsylvania; and small extensions into West Virginia, Kentucky, New Jersey, and New York.
They are one of the world's richest temperate deciduous forests in terms of biodiversity, there are an unusually high number of species of both flora and fauna, as well as a high number of endemic species. The reasons for this are the long-term geologic stability of the region, its long ridges and valleys which serve both as barrier and corridors, and their general north-south alignment which allowed habitats to shift southward during ice ages. The mountains also contain a large variety of diverse landscapes, microclimates and soils all constituting microhabitats allowing many refugia areas and relict species to survive and thrive.
The climate varies from humid continental in the north to humid subtropical in the south. Summers are hot at lower elevations, warm at higher elevations. Winters are cold at higher elevations and cool at lower elevations.
In terms of biodiversity, the only comparable temperate deciduous forest region in the world is that of central China. Both the Appalachians (along with the neighbouring Appalachian mixed mesophytic forests ecoregion) and central China contain relict habitats of an ancient forest that was once widespread over the Northern Hemisphere. There are species, genera, and families of plants that occur only in these two locations. The Great Smoky Mountains are particularly rich in biodiversity.
The Appalachians are home to 158 different species of tree, more than anywhere else in North America. There are two main types of forest; deciduous oak forest at low elevations (between 250m and 1350m), and coniferous spruce-fir forest above that. Until 1890 the oaks were mixed with American chestnut but these were largely wiped out by the Chestnut blight fungus in the early 1900s.
Cove forests 
Cove forests occur in coves and on low north- and east-facing slopes in the southern Blue Ridge and central Appalachian Mountains. They are among the most biologically diverse ecosystems in the country. Typical trees of these forests are sugar maple (Acer saccharum), American beech (Fagus grandifolia), eastern hemlock (Tsuga canadensis), Carolina silverbell (Halesia tetraptera), tulip tree (Liriodendron tulipifera), red maple (Acer rubrum), white oak (Quercus alba), northern red oak (Quercus rubra), yellow birch (Betula alleghaniensis), yellow buckeye (Aesculus flava), and basswood (Tilia americana). Oaks gain numbers on drier sites.
Low-elevation pine forests 
Southern Appalachian low-elevation pine forests occur on a variety of topographic and landscape positions, including ridgetops, upper- and mid-slopes, and in lower elevations (generally below 2,300 feet (700 m)) such as mountain valleys. These forests dominated by shortleaf pine (Pinus echinata) and Virginia pine (Pinus virginiana).Pitch pine (Pinus rigida) may sometimes be present. Hardwoods are sometimes abundant, especially dry-site oaks such as southern red oak (Quercus falcata), chestnut oak (Quercus prinus), and scarlet oak (Quercus coccinea), but also pignut hickory (Carya glabra), red maple (Acer rubrum), and others. The shrub layer may be well-developed, with hillside blueberry (Vaccinium pallidum), black huckleberry (Gaylussacia baccata), or other acid-tolerant species most characteristic. Herbs are usually sparse but may include narrowleaf silkgrass (Pityopsis graminifolia) and goat-rue (Tephrosia virginiana).
Oak forests 
Southern Appalachian oak forests, widespread in the southeastern United States, occur on dry, upland sites on southern and western aspects and ridgetops. The composition of these forests varies throughout their range but often includes chestnut oak (Quercus prinus), northern red oak (Quercus rubra), eastern black oak (Quercus velutina), white oak, (Quercus alba), and scarlet oak (Quercus coccinea). Hickories such as bitternut (Carya cordiformis), shagbark (Carya ovata), and mockernut (Carya tomentosa), are found here, as are black tupelo (Nyssa sylvatica), red maple (Acer rubrum), white pine (Pinus strobus), and white ash (Fraxinus americana).
Dry calcareous forests 
The Southern Ridge and Valley/Cumberland dry calcareous forests occur on dry to dry-mesic calcareous habitats in the southern Ridge-and-Valley Appalachians. They are often found on deep soils in a variety landscapes within their range. Trees are mainly oaks and hickories, with other species less abundant. Oaks include white oak (Quercus alba), northern red oak (Quercus rubra), post oak (Quercus stellata), chinkapin oak (Quercus muehlenbergii), and Shumard oak (Quercus shumardii). Hickories include shagbark hickory (Carya ovata). Other trees can be sugar maple (Acer saccharum), eastern red-cedar (Juniperus virginiana), or pines.
Dry oak forests and woodlands 
The Allegheny-Cumberland dry oak forest and woodland forest system is found on ridges in the southern Ridge and Valley. The forests are typically dominated by white oak (Quercus alba), southern red oak (Quercus falcata), chestnut oak (Quercus prinus), scarlet oak (Quercus coccinea), with lesser amounts of red maple (Acer rubrum), pignut hickory (Carya glabra), and mockernut hickory (Carya tomentosa). A few shortleaf pines (Pinus echinata) or Virginia pines (Pinus virginiana) may occur, particularly adjacent to escarpments or following fire. Sprouts of chestnut (Castanea dentata) can often be found where it was formerly a common tree.
Dry oak-pine forests 
Central Appalachian dry oak-pine forests occur on dry sites with loamy to sandy soils. A mix of oak and pine tree species dominate the canopy, typically chestnut oak (Quercus prinus), Virginia pine (Pinus virginiana), and white pine (Pinus strobus), but sometimes white oak (Quercus alba) or scarlet oak (Quercus coccinea). Varying amounts of oaks and pines can result in oak forests, mixed oak-pine forests, or small pine forests. Flowering dogwood (Cornus florida), sourwood (Oxydendrum arboreum), sassafras (Sassafras albidum), and blackgum (Nyssa sylvatica) live in the midstory and hillside blueberry (Vaccinium pallidum), black huckleberry (Gaylussacia baccata), and mountain laurel (Kalmia latifolia) are common in the understory, where they can form a dense layer. 
Dry-mesic oak forests 
Northeastern interior dry-mesic oak forests cover large areas at low and middle elevations, typically on flat to gently rolling terrain. Red oak (Quercus rubra), white oak (Quercus alba), and black oak (Quercus velutina) are common oaks in this habitat. Other trees include hickories (Carya spp.), red maple (Acer rubrum), sugar maple (Acer saccharum), white ash (Fraxinus americana), tulip tree (Liriodendron tulipifera), American beech (Fagus grandifolia), black cherry (Prunus serotina), black birch (Betula lenta), black tupelo (Nyssa sylvatica), and American elm (Ulmus americana). Flowering dogwood (Cornus florida) is a common understory tree.
Pine-oak rocky woodland 
Central Appalachian pine-oak rocky woodlands occur on lower-elevation hilltops, outcrops, and rocky slopes and have a patchy or open aspect. Pitch pine (Pinus rigida) and Virginia pine (Pinus virginiana) are common within their respective ranges. These pines are often mixed with dry-site oaks such as chestnut oak (Quercus prinus), bear oak (Quercus ilicifolia), northern red oak (Quercus rubra), and scarlet oak (Quercus coccinea). Sprouts of chestnut (Castanea dentata) can also be found. In the northeast, eastern red-cedar (Juniperus virginiana) or hophornbeam (Ostrya virginiana) are sometimes important. In the understory, some areas have a fairly well-developed heath shrub layer, others a graminoid layer, the latter particularly common under deciduous trees such as oaks.
Montane oak forests 
Montane oak forests occur on exposed ridges and on south- to west-facing slopes at middle elevations. Soils are thin and nutrient-poor and trees are often stunted and wind-flagged. Northern red oak (Quercus rubra) and white oak (Quercus alba) are common, as are sprouts of American chestnut (Castanea dentata). Winterberry (Ilex montana), flame azalea (Rhododendron calendulaceum), catawba rhododendron (Rhododendron catawbiense), and great rhododendron (Rhododendron maximum) are common shrubs.
Montane pine forests and woodlands 
These forests and woodlands are found on exposed ridges, clifftops, and south- and west-facing slopes. They occur at elevations between 1,500 to 4,000 feet (460 to 1,200 m) on often rocky ground. The underlying rock is acidic and sedimentary or metasedimentary (e.g., quartzites, sandstones and shales). The soil is shallow, arid, and infertile. Dead wood, ericaceous shrubs, and a thick layer of poorly decomposed plant litter make this habitat very fire-prone. Most examples are dominated by table mountain pine (Pinus pungens), often with pitch pine (Pinus rigida) or Virginia pine (Pinus virginiana), and occasionally with Carolina hemlock (Tsuga caroliniana) and chestnut oak (Quercus prinus). This habitat takes the form of patchy to open woodlands, although closed-canopy may also be found.
Northern hardwood forests 
Northern hardwood forests occur in cool, mesic habitats found above 4,500 feet (1,400 m) on north- and east-facing slopes of the southern Appalachians. Oak forests are often found nearby, either at lower elevations or in more exposed areas. Sugar maple (Acer saccharum), beech (Fagus grandifolia), yellow birch (Betula alleghaniensis), and yellow buckeye (Aesculus flava) dominate but are sometimes joined by the conifers eastern hemlock (Tsuga canadensis), eastern white pine (Pinus strobus), and red spruce (Picea rubens). Black cherry (Prunus serotina) and white basswood (Tilia heterophylla) are occasionally abundant. Red oak (Quercus rubra) may be present but is not dominant. Areas where beech is dominant are known as beech gaps.
Hemlock–northern hardwood forests 
Hemlock–northern hardwood forests are found in deep coves, moist flats, and ravines from Virginia and West Virginia northward. They include yellow birch (Betula alleghaniensis), mountain maple (Acer spicatum), sugar maple (Acer saccharum), and beech (Fagus grandifolia). These trees are sometimes joined by hemlock (Tsuga canadensis) or white pine (Pinus strobus).
Spruce-fir forests 
Uncommon but significant are montane and allied spruce and Southern Appalachian spruce-fir forests. These occur only on the highest peaks and ridges, where the soils are poor, the growing season short, and moisture comes from rain, snow, and fog. Red spruce, Fraser fir, yellow birch, mountain ash, and mountain maple identify these forests, while hobblebush and bearberry occur in the understory.
Appalachian balds are areas covered by native grasses or dense shrubs that occur only on some high-elevation summits and slopes.
Endangered or threatened species of the Appalachians include some snails and salamanders, the Red-shouldered Hawk (Buteo lineatus), Loggerhead Shrike (Lanius ludovicianus), Virginia big-eared bat (Corynorhinus townsendii virginianus), the Red Wolf (Canis rufus) and the spruce-fir moss spider (Microhexura montivaga). The limestone caves of the Appalachians are important habitat for bats, invertebrates, fish and salamanders including 34 species of Lungless salamander, more than anywhere else on earth.
The forests have been altered by logging and clearance for agriculture, urban and industrial development (including mining) with only small patches of original forest remaining, the largest of which is in the Great Smoky Mountains; nearly all of Shenandoah National Park, for example, is regrown forest but still vital habitat for wildlife. The spruce and fir forests of the highlands have been logged particularly intensively and in many cases have not regenerated leaving areas of Appalachian balds heath. Also, as large predators such as wolves and mountain lions have been removed, the forests are now being overgrazed by deer. Plants and animals are also threatened by introduced species including the gypsy moth (Lymantria dispar), spruce budworm (Choristoneura fumiferana), Hemlock woolly adelgid (Adelges tsugae), Balsam woolly adelgid (A. piceae) and the Discula destructiva that affects dogwoods and is similar to chestnut blight.
Areas of intact habitat 
Areas of intact forest, mostly in public ownership, include:
- Crockford-Pigeon Mountain Wildlife Management Area
- Chattahoochee National Forest
- South Carolina
- North Carolina
- Great Smoky Mountains National Park
- Cherokee National Forest
- George Washington and Jefferson National Forests
- Ramsey's Draft Wilderness
- Rough Mountain Wilderness
- Rich Hole Wilderness
- Saint Mary's Wilderness
- Priest Wilderness
- Three Ridges Wilderness
- James River Face Wilderness
- Shawvers Run Wilderness
- Peters Mountain Wilderness
- Mountain Lake Wilderness
- Brush Mountain East Wilderness
- Brush Mountain Wilderness
- Hunting Camp Creek Wilderness
- Garden Mountain Wilderness
- Beartown Wilderness
- Little Dry Run Wilderness
- Raccoon Branch Wilderness
- Little Wilson Creek Wilderness
- Lewis Fork Wilderness
- Clinch Mountain Wildlife Management Area
- Hidden Valley Wildlife Management Area
- Nathaniel Mountain Wildlife Management Area
- Sleepy Creek Wildlife Management Area
- Shenandoah National Park
- Indian Springs Wildlife Management Area
- George Washington and Jefferson National Forests
- West Virginia
- New Jersey
- New York
See also 
- Southern Appalachian spruce-fir forest — an adjacent higher elevations ecoregion.
- Appalachian balds
- List of ecoregions in the United States (WWF)
- Hoekstra, J. M.; Molnar, J. L.; Jennings, M.; Revenga, C.; Spalding, M. D.; Boucher, T. M.; Robertson, J. C.; Heibel, T. J. et al. (2010). In Molnar, J. L. The Atlas of Global Conservation: Changes, Challenges, and Opportunities to Make a Difference. University of California Press. ISBN 978-0-520-26256-0.
- "Appalachian-Blue Ridge forests". Terrestrial Ecoregions. World Wildlife Fund.
- Guidance for conserving and restoring old-growth forest communities on national forests in the Southern Region. United States Forest Service, Southern Region. 1997.
- "Southern Appalachian Low-Elevation Pine Forest". NatureServe Explorer. Retrieved 11 October 2012.
- George Washington National Forest 1993 Revised Forest Plan. United States Forest Service. 1993.
- Jefferson National Forest 2004 Revised Forest Plan. United States Forest Service. 2004.
- "Southern Appalachian Oak Forest". NatureServe Explorer. Retrieved 14 October 2012.
- "Southern Ridge and Valley / Cumberland Dry Calcareous Forest". NatureServe Explorer. Retrieved 02 November 2012.
- "Allegheny-Cumberland Dry Oak Forest and Woodland". NatureServe Explorer. Retrieved 11 October 2012.
- "Central Appalachian Dry Oak-Pine Forest". NatureServe Explorer. Retrieved 03 November 2012.
- "Northeastern Interior Dry-Mesic Oak Forest". NatureServe Explorer. Retrieved 07 October 2012.
- "Central Appalachian Pine-Oak Rocky Woodland". NatureServe Explorer. Retrieved 04 November 2012.
- "Central and Southern Appalachian Montane Oak Forest". NatureServe Explorer. Retrieved 10 October 2012.
- "Southern Appalachian Montane Pine Forest and Woodland". NatureServe Explorer. Retrieved 17 October 2012.
- "Southern Appalachian Northern Hardwood Forest". NatureServe Explorer. Retrieved 21 October 2012.
- "Appalachian (Hemlock)-Northern Hardwood". NatureServe Explorer. Retrieved 22 October 2012.
- "Appalachian-Blue Ridge forests". Terrestrial Ecoregions. World Wildlife Fund.