Western Allegheny Plateau (ecoregion)

Western Allegheny Plateau
Western Allegheny Plateau (area 70 on the map)
Ecology
Realm	Nearctic
Biome	Temperate broadleaf and mixed forests
Bird species
Mammal species
Geography
Country	United States
State	West Virginia, Pennsylvania, Ohio, Kentucky

The Western Allegheny Plateau is an ecoregion of the Temperate broadleaf and mixed forests Biome, located on the western Allegheny Plateau and in the Appalachia region of the Eastern United States.

The Western Allegheny Plateau ecoregion is located on the western Allegheny Plateau, which is within the central region of the Appalachian Plateau.

The World Wildlife Fund defines the ecoregion as being the northern part of the Appalachian mixed mesophytic forests.

The Environmental Protection Agency defines it as running from west-central Pennsylvania, east-central and south Ohio, north and northwest West Virginia, and a portion of northeast Kentucky.

The ecoregion covers approximately 84,500 km2 (32,630 mi2). It is about 72 percent forest and 23 percent agriculture. Coal mining is still active in the Pennsylvania, West Virginia, and Kentucky portions of the ecoregion, and in Appalachian Ohio to a lesser extent.

The forest area is mostly mixed oak and mixed temperate forests.

Native plant species include:

Between 1890 and 1920, loggers cleared most of the Allegheny Plateau. Save for a few pockets of old growth forest, the current forests, which contain most of the presettlement species in different relative abundances and distribution, originated at that time. The heavy cutting favored hardwoods and created massive amounts of coniferous slash, providing ideal conditions for widespread and intense fires. The fires were a major factor in the virtual elimination of white pine and hemlock in the Allegheny forests. Repeated fires also tended to reduce the proportion of sugar maple, beech, and other typical hardwoods and increase such species as aspen, pin cherry, sedges, grasses, and honeysuckles.