Bison and the Environment
Native grasslands comprise more than 40 percent of North America’s natural landscape. The grasses covering these open landscapes serve as powerful carbon traps, with slender leaves removing CO2 from the atmosphere and returning it to the soil through an extensive system of roots. These grasslands did not occur in a vacuum. In fact, North America’s grasslands evolved over tens of thousands of years of continuous grazing by large ruminants, most notably the American bison. This co-evolutionary process to grasses and grazers developed into a symbiotic relationship that is vital to the health of both.
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