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In page Climate change in Wyoming:

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Climate change also poses a threat to the high alpine systems, and this zone could disappear in many areas. Local extinctions of alpine species such as arctic gentian, alpine chaenactis, rosy finch, and water pipit could be expected as a result of habitat loss and fragmentation. Even a modest warming and drying could reduce whitebark pine habitat by up to 90% within 50 years. Whitebark pine nuts and army cutworm moth caterpillars, which are found in these forests, provide vital food for Wyoming’s grizzly bear population. Whitebark pine forest may be replaced with Douglas fir, and on the lower slopes, forest would give way to treeless landscapes dominated by big sagebrush, Idaho fescue, and bluebunch wheatgrass.[citation needed]