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The North America Prairies is a large grassland floristic province within the North American Atlantic Region, a floristic region within the Holarctic Kingdom.It lies between the Appalachian Province and the Rocky Mountains and includes the prairies of the Great Plains.
The Central Great Plains are a prairie ecoregion of the central United States, part of North American Great Plains. The region runs from west-central Texas through west-central Oklahoma, central Kansas, and south-central Nebraska. It is designated as the Central and Southern Mixed Grasslands ecoregion by the World Wide Fund for Nature.
The Prairie Peninsula was mostly forested during the early Holocene. Prairie species began to thrive as aridity in the region increased between 10,000 and 8,500 years ago, displacing trees such as elms, ashes, ironwoods, and sugar maples. Trees recolonized the area between 8,500 and 6,200 years ago, such as oaks and hickories. The prairie ...
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The shrub-steppes of North America occur in the western United States and western Canada, in the rain shadow between the Cascades and Sierra Nevada on the west and the Rocky Mountains on the east. The expanses of grass once sustained migrations of an estimated 30 to 60 million American bison which maintained grazing pressure as a keystone species .
Prairie ecosystems in the United States and Canada are divided into the easternmost tallgrass prairie, the westernmost shortgrass prairie, and the central mixed-grass prairie. Tallgrass prairies receive over 30 inches of rainfall per year, whereas shortgrass prairies are much more arid, receiving only 12 inches or so, and mixed-grass prairies ...
The United States is a major exporter of agricultural products. The southern portion of the Great Plains lies over the Ogallala Aquifer , a huge underground layer of water-bearing strata. Center pivot irrigation is used extensively in drier sections of the Great Plains, resulting in aquifer depletion at a rate that is greater than the ground's ...
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