Northeastern Highlands (ecoregion)
| Northeastern Highlands Ecoregion | |
|---|---|
 | |
 Northeastern Highlands region denoted in forest green | |
| Ecology | |
| Realm | Nearctic |
| Biome | temperate broadleaf forest |
| Geography | |
| Area | 122,406.62 km2 (47,261.46 sq mi) |
| Country | United States |
| Elevation | 365 meters |
| Coordinates | 42°N, -73°W |
| Climate type | Warm summer humid continental |
| Soil types | Spodosols |
The Northeastern Highlands ecoregion is a Level III ecoregion designated by the United States Environmental Protection Agency (EPA) in the U.S. states of Vermont, New Hampshire, Massachusetts, Maine, Connecticut, New York, New Jersey, and Pennsylvania. The ecoregion extends from the northern tip of Maine and runs south along the Appalachian Mountain Range into eastern Pennsylvania. Discontiguous sections are located among New York's Adirondack Mountains and the Catskill Range. The largest portion of the Northeastern Highlands ecoregion encompasses several sub mountain ranges including the Berkshires, Green Mountains, Taconic, and White Mountains.
The mountainous region is underlain by metamorphic rock and glacial till. The ecoregion is flanked by several others including the: Acadian Plains and Hills, Eastern Great Lakes Lowlands, Northeastern Coastal Zone, Northern Allegheny Plateau, Ridge and Valley, and Northern Piedmont ecoregions.[1] The elevation generally ranges from 182 meters (597 ft) to 1,916.6 meters (6,288 ft) at the top of Mount Washington, the region's highest and most prominent point. The region is characterized by hot humid summers and cold snowy winters. The nutrient-poor spodosols and other cryic soil types of the region support boreal (north) and broadleaf (south) forests that cover the majority of the region. Ecotourism, forestry, and agriculture are the predominant land uses of the sparsely populated region.[2] Though much of the region was once cleared to make farmland, much of it has reverted into natural forested areas; to a lesser extent, dairy and crops are still grown in lowland valleys and beef cattle on upland pastures. The ecoregion has been subdivided into thirty-three Level IV ecoregions.[2]
Native wild animals of the area include black bears, white-tailed deer, moose, bobcats, coyotes, skunks, raccoons, chipmunks, squirrels, opossum, porcupine, fisher cats, eastern turkey, bobwhite quail, ducks, blue herons, and a host of other bird, reptile, amphibian, and fish species.[3] The Northeastern Highlands ecoregion was within the range of other large mammals at the onset of European settlement; these included Boreal woodland caribou[4], which inhabited northern Vermont, New Hampshire, and Maine, as well as American bison[5], which, judicious estimates have placed in western portions of the Catskills and Adirondacks. Puma and Eastern elk, too, once inhabited a majority of the region.
Level IV ecoregions[]
58a. Taconic Mountains[]
58aa. Acid Sensitive Adirondacks[]
The Acid Sensitive Adirondacks derive their name from the underlying bedrock which has a low acid-neutralizing capacity and is one of the regions of the Northeastern Highlands that has been most affected by acid rain. The Acid Sensitive Adirondacks constitutes the largest level IV region of the Adirondack Mountain range. Acid rain has acidified the region's lakes to the point where they are uninhabitable for fish; terrestrial effects of acid rain have resulted in leaching of calcium and release of aluminum, which has resulted in tree mortality. Tree cover in the region is dominated by conifers including red, white, and black spruce, as well as balsam fir, red maple, yellow birch, and black cherry.[6][7]
58ab. Northern and Western Adirondack Foothills[]
58ac. Eastern Adirondack Foothills[]
58ad. Central Adirondacks[]
58ae. Tug Hill Plateau[]
58af. Tug Hill Transition[]
58ag. Rensselaer Plateau[]
58b. Western New England Marble Valleys[]
58c. Green Mountains/Berkshire Highlands[]
The Green Mountains (Vermont)/Berkshire Highlands (Massachusetts) are part of the same level IV ecoregion, but are defined by different names per their political state boundaries. The region is dominated by steep mountainsides with prominence up to 764 meters (2,507 ft). Like most of the Northeastern Highlands ecoregion, the bedrock consists of metamorphic and glacial till and the soils are acidic, coarse, and low in nutrients. The area is primarily second growth forest, which has returned as a mixed conifer and hardwood stand. Common tree species include red oak, sugar maple, American beech, yellow birch, eastern hemlock, white pine, white ash, basswood, tamarack, black spruce, balsam fir, and white birch.[8]
This region includes the towns of Killington, Waterbury, and Stowe, Vermont, and Charlemont, Massachusetts. The primary land use includes active tourism, such as skiing, hiking, biking, and snowmobiling, as well as forestry, maple syrup production, cattle, and hay production.[8][9] This region is also home to several state parks and national woodlands including the Green Mountain National Forest, Calvin Coolidge, Camels Hump, Mount Mansfield, and Okemo State Forests, and Woodford, Molly Stark, Lake Shaftsbury, Fort Dummer, Emerald Lake, Lowell Lake, Lake St. Catherine, Camp Plymouth, Mount Ascutney, Wilgus, and Hazen's Notch state parks.
58d. Lower Berkshire Hills[]
58e. Berkshire Transition[]
58f. Vermont Piedmont[]
58g. Worcester/Monadnock Plateau[]
58h. Reading Prong[]
58i. Glaciated Reading Prong/Hudson Highlands[]
58j. Upper Montane/Alpine Zone[]
The Northeastern Upper montane/ alpine Zone is largely discontiguous as it appears only at the tallest peaks in the region. The ecozone is characterized by shallow acidic soils and nadir soils and by a short (40-80 day) frost free season[2]. The region is typically the coldest of the Northeastern Highlands. Precipitation is high in all seasons (Mt. Mansfield - Vermont's wettest location with ~2002.5 mm [78.80 in] of precipitation on average[10]; Mt. Washington tips the scales with an average of 2463.8 mm [97 in] of precipitation per year).
The Upper Montane Zone generally occurs above 1,067 m (3,500 ft) where mountain birch, balsam fir and black spruce are dominant. Above the tree line at 1372 m (4500 ft), alpine meadows, and low-growing shrubs persist; these include but are not limited to: lapland rosebay, northern blueberry, dwarf birch, bog blueberry, highland rush, bigelow's sedge and shrubby fivefingers[11][12]. These peaks, island refuges, are relics of a larger ecosystem that coverd New England when the last glaciers melted in the region ~12,000 years ago[13]. These unique ecosystems are home to several insect species, like the endangered white mountain fritillary butterfly. The American Pipit is a unique bird species, and only obligate alpine nesting bird in New England[13].
58k. Green Mountain Foothills[]
The Green Mountain Foothills (aka Champlain hills) form a transitional ecoregion between the northern Green Mountains on the east to the Champlain Lowlands on the west. This region is hilly and ranges in elevation from 122 to 457 meters (400 to 1,499 ft), with the high point on Fletcher Mountain (653 meters (2,142 ft)). The area is composed mostly of frigid spodosols; sandy, coarse-loamy, and fine-loamy soils and a dense mixed forest. The region, although reforested, it still mosaiced by dairy, hay, and pasture crops.
58l. Northern Piedmont[]
The Northern Piedmont ecoregion in Vermont is distinguished from the Vermont Piedmont by it northern location and associated colder climate. It is sometimes referred to as the Northern Vermont Piedmont and is distinct from the Northern piedmont ecoregion extending from New York to Virginia. Bedrock in this Vermont region is mostly limestone, phyllite, mica, schist, quartzite, and slate, with lesser areas composed of granite gneiss; hence it is different from surrounding granite mountain ranges. The Northern Piedmont is mountainous with large open valleys, making it better suited to farming than the hillier terrain of the neighboring Green Mountains, though the colder climate means that cropping or grazing seasons are short (100-140 growing days). The climate is more seasonal than in the southerly humid continental range, with a seasonal summer monsoon which is twice that of winter snowfall. Trees in the region are similar to those in the Green Mountains, wherein northern hardwoods dominate on lower elevation terrain and mixed hardwood and hemlock or spruce–fir forests are supported on upland terrain.
Agriculture abounds in the Northeast Kingdom and commonly includes production of hay, cattle corn, oats, vegetables, and grazing land. The area is sparsely populated, but includes Vermont's capitol, Montpelier (the least populated state capital in the US) and the city of Barre. Brighton State Park is located in the Northern Piedmont. This area and the Quebec/New England Boundary Mountains support the most moose in Vermont and New Hampshire.[14]
58m. Quebec/New England Boundary Mountains[]
The Boundary Mountains extend between Quebec and New England from northeast Vermont into Central Maine. The Longfellow Mountains (named for Henry Wadsworth Longfellow) are within this range and so is Maine's Baxter State Park. The region is dominated by low, open mountains, interspersed with deep ponds. Likewise, Lake Willoughby, a National Natural Landmark is a good example of a Fjord-like deep lake in the region surrounded on sides by tall mountains. Like the other Northeast Highland ecoregions, the Quebec/New England Boundary Mountains are cold, yet humid continental with an average of 85-125 frost free days. The region is mostly forested and dominated by conifers with some mixed and deciduous forests. High elevation regions are mostly spruce-fir, red spruce, balsam fir, and mountain, paper, and yellow birch. The area is sparsely populated and there is little farming; the region is mostly used for hunting, recreation, and maple syrup production. [15]
58n. White Mountain Foothills[]
58o. Northern Connecticut Valley[]
58p. White Mountains/Blue Mountains[]
58q. Sunapee Uplands[]
58r. Sebago-Ossipee Hills and Plains[]
58s. Western Maine Foothills[]
58t. Upper St. John Wet Flats[]
58u. Moosehead-Churchill Lakes[]
58v. St. John Uplands[]
58w. International Boundary Plateau[]
58x. Taconic Foothills[]
58y. Catskill High Peaks[]
58z. Adirondack Peaks[]
See also[]
References[]
- ^ "Level III Ecoregions of the Continental United States" (PDF). National Health and Environmental Effects Research LaboratoryU.S. Environmental Protection Agency. June 17, 2021.
{{cite web}}: CS1 maint: url-status (link) - ^ a b c Griffith, G.E., Omernik, J.M., Bryce, S.A., Royte, J., Hoar, W.D., Homer, J.W., Keirstead, D., Metzler, K.J., and Hellyer, G., 2009, Ecoregions of New England (color poster with map, descriptive text, summary tables, and photographs): Reston, Virginia, U.S. Geological Survey (map scale 1:1,325,000).
- ^ "Northeastern Highland Biophysical Region Check List". iNaturalist.ca. Retrieved 2021-06-18.
- ^ "The Quiet Extinction: Caribou have vanished from Montana, and scientists fear they could be beyond saving".
- ^ C. Cormack Gates; Thomas S. Jung (2013). "Committee on the Status of Endangered Wildlife in Canada (COSEWIC), 2013. COSEWIC assessment and status report on the Plains Bison Bison bison bison and the Wood Bison Bison bison athabascae in Canada".
{{cite journal}}: Cite journal requires|journal=(help)CS1 maint: multiple names: authors list (link) - ^ Griffith, Glenn E.; Omernik, James M.; Johnson, Colleen Burch; Turner, Dale S. (2014). "Ecoregions of Arizona (poster)". Open-File Report. doi:10.3133/ofr20141141. ISSN 2331-1258.
- ^ "Acid Sensitive Adirondacks". bplant.org. Retrieved 2021-06-18.
- ^ a b "Green Mountains/Berkshire Highlands". bplant.org. Retrieved 2021-06-18.
- ^ Griffith, Glenn E.; Omernik, James M.; Johnson, Colleen Burch; Turner, Dale S. (2014). "Ecoregions of Arizona (poster)". Open-File Report. doi:10.3133/ofr20141141. ISSN 2331-1258.
- ^ "Annual Vermont rainfall, severe weather and climate data". coolweather.net. Retrieved 2022-03-29.
- ^ Bryce, S.A., Griffith, G.E., Omernik, J.M., Edinger, G., Indrick, S., Vargas, O., and Carlson, D. "Ecoregions of New York (Poster)", U.S. Geological Survey (2010) Web.
- ^ Griffith, G.E., Omernik, J.M., Bryce, S.A., Royte, J., Hoar, W.D., Homer, J.W., Keirstead, D., Metzler, K.J., and Hellyer, G. "Ecoregions of New England (Poster)", U.S. Geological Survey (2009) Web.
- ^ a b "Something Wild: Life Abounds in Alpine Zones". New Hampshire Public Radio. 2017-01-27. Retrieved 2022-03-29.
- ^ "Moose population in North America". Retrieved 2021-06-18.
- ^ "Quebec/New England Boundary Mountains". bplant.org. Retrieved 2022-03-04.
- Ecoregions of the United States