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| prairie | |
|---|---|
| Name | Prairie |
| Biome type | Temperate grassland |
| Climate | Continental |
| Dominant plants | Grasses, forbs, sedges |
| Dominant animals | Bison, prairie dog, grassland birds |
prairie
Prairie are temperate grassland ecosystems dominated by grasses, herbaceous flowering plants, and patches of woody vegetation, occurring across broad continental interiors. These landscapes played central roles in the histories of North American exploration, Indigenous nations, agricultural expansion, and conservation science, shaping cultural icons, transportation corridors, and scientific debates. Prairies exhibit gradients from tallgrass to shortgrass formations and support distinctive assemblages of plants and animals adapted to fire, grazing, climate variability, and deep soils.
Prairie classifications distinguish tallgrass, mixed-grass, and shortgrass types by precipitation, dominant graminoids, and disturbance regimes; key historical studies and descriptions appear in works by Aldo Leopold, reports from the United States Department of Agriculture, and inventories by the Nature Conservancy. Tallgrass prairie, exemplified by remnants in the Tallgrass Prairie National Preserve and research at Konza Prairie Biological Station, supports species such as big bluestem and switchgrass and historically overlapped with territories of the Osage Nation. Mixed-grass prairie occupies transitional zones across the Great Plains and was traversed by expeditions like the Lewis and Clark Expedition, while shortgrass prairie occurs in rain-shadowed basins near the Rocky Mountains and intersects ranching histories linked to figures like Buffalo Bill Cody and routes such as the Santa Fe Trail.
Prairie ecosystems span large parts of central North America from southern Canada provinces like Saskatchewan and Manitoba through the central United States into northern Mexico, intersecting political regions including Kansas, Nebraska, Iowa, Illinois, Oklahoma, Texas, and Montana. Their distribution correlates with continental climatic patterns influenced by air masses tied to the Gulf of Mexico, the Pacific Ocean, and the Arctic. Historic mapping projects by agencies such as the United States Geological Survey and botanical syntheses by institutions like the Smithsonian Institution document prairie extent and fragmentation along transportation corridors including the Transcontinental Railroad and settlement fronts like the Homestead Act era.
Prairie biodiversity includes a high diversity of wildflowers, grasses, and soil biota supporting mammals, birds, reptiles, and invertebrates adapted to open habitats; iconic fauna include the American bison, prairie dog complexes, and grassland-obligate birds observed at sites monitored by the Audubon Society and research programs at universities such as University of Kansas and Kansas State University. Pollinators and seed dispersers interact with prairie forbs in phenological cycles documented in studies by the Ecological Society of America and conservation inventories by the World Wildlife Fund. Keystone interactions—such as those between grazing bison, disturbance from fire, and prairie dog engineering—shape plant community mosaics analogous to dynamics described in classic works by Franklin H. Knowlton and in modern syntheses published in journals like Science and Ecology Letters.
Prairie soils are often deep, fertile mollisols formed under long-term grassland vegetation, with carbon-rich horizons that attracted agricultural development and soil surveys by the Natural Resources Conservation Service. Fire regimes—both frequent low-intensity burns and patchy wildfires—maintain grass dominance by suppressing woody encroachment; prescribed burning programs at sites such as Konza Prairie Biological Station and policy frameworks influenced by agencies like the National Park Service inform management. Soil carbon dynamics and prairie contributions to the global carbon cycle are subjects of research by institutions including Cornell University and University of Illinois Urbana-Champaign, and relate to debates around carbon sequestration, grazing management studied in the Journal of Applied Ecology, and impacts from conversion driven during the Dust Bowl era examined in historical analyses.
Human use of prairie landscapes encompasses millennia of Indigenous stewardship by nations such as the Lakota, Ojibwe, Comanche, Cherokee, and Pawnee, colonial encounters during fur trade routes tied to the Hudson's Bay Company and the American Fur Company, and later settlement under laws including the Homestead Act of 1862. Agricultural expansion, mechanized farming promoted by companies like John Deere and policies from the United States Department of Agriculture, transformed vast prairies into cropland, reducing intact habitat and altering hydrology tracked by the United States Environmental Protection Agency. Social and cultural histories—from the literature of Willa Cather to visual art in museums like the Art Institute of Chicago—reflect changing relationships to prairie landscapes and species extirpations such as the near-loss of bison reversed by recovery programs led by organizations like the National Park Service and private conservancies.
Conservation efforts combine protected areas (for example the Tallgrass Prairie National Preserve and prairie restorations in Chicago Wilderness), collaborative initiatives by NGOs such as the Nature Conservancy and the Audubon Society, and academic research from centers including University of Nebraska–Lincoln. Restoration ecology employs seed sourcing from remnant prairies, controlled burning, reintroduction of grazers, and invasive species control, with monitoring guided by standards from organizations like the Society for Ecological Restoration. Policy instruments, habitat corridors along rivers like the Missouri River and cross-jurisdictional programs involving agencies such as the United States Fish and Wildlife Service aim to reconnect fragments and bolster ecosystem services, biodiversity, and cultural values tied to prairie heritage.
Category:Temperate grasslands