- Tallgrass prairie
The tallgrass prairie is an
ecosystemnative to central North America, with fire as its primary periodic disturbance. In the past, tallgrass prairies covered a large portion of the American Midwest, just east of the Great Plains, and portions of the Canadian Prairies. They flourished in areas with rich loesssoils and moderate rainfall of around 30 to 35 inches (760 to 890 mm) per year. To the east were the fire-maintained eastern savannas. In the northeast, where fire was infrequent and periodic blowdown represented the main source of disturbance, beech- mapleforests dominated. Shortgrass prairiewas typical in the western Great Plains, where rainfall is less frequent and soils are less fertile.
As its name suggests, the most obvious features of the tallgrass prairie are tall
grasses such as big bluestemand indiangrass, which average between 5 and 6 feet (1.5 and 2 m) tall, with occasional stalks as high as 8 or 9 feet (2.5 or 3 m). Prairies also include a large percentage of forbs, such as lead plant, Prairie Rosinweed ("Silphium terebinthinaceum"), and coneflowers.
The tallgrass prairie
biomedepends upon prairie fires, a form of wildfire, for its survival and renewal.Citation | last =Klinkenborg | first =Verlyn | title =Splendor of the Grass: The Prairie's Grip is Unbroken in the Flint Hills of Kansas | journal =National Geographic | date =April 2007 | url = http://www7.nationalgeographic.com/ngm/0704/feature5/ ] Tree seedlings and intrusive alien specieswithout fire-tolerance are eliminated by periodic fires. Such fires may either be set by humans (for example, Native Americans used fires to drive buffalo and improve hunting, travel, and visibility) or started naturally by lightning. Attempts to re-establish small sections of tallgrass prairie in arboretumfashion were unsuccessful until controlled burns were instituted.
Technically, prairies have less than 5-11% tree cover. A grass-dominated plant community with 10-49% tree cover is a
Due to accumulation of loess and organic matter, parts of the North American tallgrass prairie had the deepest
topsoilever recorded. After the steel plow was invented by John Deere, this fertile soil became one of America's most important resources. Over 99% of the original tallgrass prairie is now farmland.
The tallgrass prairie survives in areas unsuited to plowing: the rocky hill country of the
Flint Hills, which run north to south through east-central Kansas, the eastern fringe of the Red River Valley ( Tallgrass Aspen Parkland) in Manitoba and Minnesota, the Coteau des Prairieswhich extends from South Dakota through Minnesota and into Iowa, and the far north portion of Oklahoma. In Oklahoma the tallgrass prairie was maintained by ranchers, who saw the hat-high grass as prime grazingarea for cattle.
A 39,000 acre (158 km²)
Tallgrass Prairie Preservein Osage County, Oklahoma, and a somewhat smaller 10,894 acre (44 km²) Tallgrass Prairie National Preservein Kansas, attempt to maintain this ecosystem in its natural form, and have reintroduced bison to the vast expanses of waving grass.
Other U.S. preserves include
Midewin National Tallgrass Prairiein Illinois, Broken Kettle Preserve and Neal Smith National Wildlife Refugein Iowa, Konza Prairiein Kansas, and Prairie State Parkin Missouri.
The original extent of Tallgrass Prairie in Canada was the 6,000 square kilometre plain in the
Red River Valley, southwest of Winnipegin Manitoba("see" [http://www.mb.ec.gc.ca/nature/whp/prgrass/df03s56.en.html map] ). While most of Manitoba's tallgrass prairie has been destroyed through agricultural development, relatively small areas persist. One of the largest blocks of remaining tallgrass prairie in Manitoba is protected by several conservation partners in a conservation area called the Tallgrass Aspen Parkland. The Manitoba Tall Grass Prairie Preserve, in the Rural Municipality of Stuartburn, Manitoba, forms a part of the Tallgrass Aspen Parkland. This preserve protects contains about 4000 hectares (10,000 acres) of tallgrass prairie, aspen parkland and wetlands.
In eastern North Dakota is
Sheyenne National Grassland, the only National Grassland on the tallgrass prairie.
There is a small pocket (less than 5 square km) of Tallgrass Prairie in the southwest corner of
Windsor, Ontario, protected by Ojibway Park, and Spring Garden ANSI (Area of Natural Scientific Interest), along with the inter-connected parks: Black Oak Heritage Park, Ojibway Prairie Provincial Nature Reserveand the Tallgrass Prairie Heritage Park, all operated by the City of Windsor's Parks and Recreation, aside from the Provincial Nature Reserve.
Midewin National Tallgrass Prairie, founded in 1996 near Elwood, Illinois, was as of 2006 the largest tallgrass prairie restoration area in the United States.
Glacial Ridge National Wildlife Refugewas established in 2004. The core of the refuge is a preserved convert|5000|acre|km2|0 tallgrass prairie remnant, and an additional convert|30000|acre|km2|0 are either in the process of restoration or will be soon. According to The Nature Conservancy, so far 100 wetlands have been restored and convert|8000|acre|km2|0 of land have been seeded with native plant species. [The Nature Conservancy. [http://www.nature.org/wherewework/northamerica/states/minnesota/preserves/art6943.html Glacial Ridge Project] . www.nature.org. Retrieved on: November 14, 2007.]
* [http://www.tallgrassontario.org Tallgrass Ontario]
* Manning, Richard. "Grassland: The History, Biology, Politics and Promise of the American Prairie"
* Cushman, Ruth Carol. "Peterson Field Guides: The North American Prairie" (Peterson Guides)
* Least Heat-Moon, William. "PrairyErth (A Deep Map): An Epic History of the Tallgrass Prairie Country"
* Savage, Candace. "Prairie: A Natural History"
* White, Matt. "Prairie Time: A Blackland Portrait"
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Look at other dictionaries:
tallgrass prairie — noun Date: 1920 prairie 2a … New Collegiate Dictionary
tallgrass prairie — noun : prairie 1a … Useful english dictionary
Tallgrass Prairie Preserve — Catégorie UICN Ia (réserve naturelle intégrale) Identifiant 375711 … Wikipédia en Français
Tallgrass Prairie National Preserve — Infobox protected area | name = Tallgrass Prairie National Preserve iucn category = caption = locator x = 140 locator y = 92 location = Chase County, Kansas nearest city = Emporia, Kansas lat degrees = 38 lat minutes = 25 lat seconds = 58 lat… … Wikipedia
Tallgrass Prairie Preserve — This article is about the Tallgrass Prairie Preserve in Oklahoma. There is also a Tallgrass Prairie National Preserve in Kansas operated by US National Park Service, and a Tall Grass Prairie Preserve in Manitoba managed by a number of partners,… … Wikipedia
Midewin National Tallgrass Prairie — 41°20′33″N 88°07′52″W / 41.34252°N 88.13123°W / 41.34252; 88.13123Coordinates … Wikipedia
Northern Tallgrass Prairie National Wildlife Refuge — was established to provide a means of working with individuals, groups, private organizations, and government entities to permanently preserve a portion of the remaining remnant tracts of northern tallgrass prairie in Minnesota and Iowa. The… … Wikipedia
Northern Tallgrass Prairie National Wildlife Refuge — Sp Šiaurinės Aukštãžolių Prèrijos nacionãlinis gamtõs rezervãtas Ap Northern Tallgrass Prairie National Wildlife Refuge L JAV (Minesota) … Pasaulio vietovardžiai. Internetinė duomenų bazė
Prairie (Amerique du Nord) — Prairie (Amérique du Nord) Pour les articles homonymes, voir prairie. La Prairie dans le Dakota du Sud. La Prairie ( … Wikipédia en Français
Prairie (amérique du nord) — Pour les articles homonymes, voir prairie. La Prairie dans le Dakota du Sud. La Prairie ( … Wikipédia en Français