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Prairie | Flora, Fauna Ecology | Britannica prairie, level or rolling grassland, especially that found in central North America Decreasing amounts of rainfall, from 100 cm (about 40 inches) at the forested eastern edge to less than 30 cm (about 12 inches) at the desertlike western edge, affect the species composition of the prairie grassland The vegetation is composed primarily of perennial grasses, with many species of flowering
Prairies and Grasslands - U. S. National Park Service The prairie ecosystem is like a puzzle When parts of the puzzle go missing, it is difficult to understand the complete picture At Wind Cave, as many parts of this puzzle are preserved as is possible As a result, this park is a refuge for prairie plants and animals, and a great place to see a remnant of the North American grasslands At one time, a third of the North American continent was