Ecology of sympatric populations of mule deer and white-tailed deer in a prairie environment ecologyofsympatr1989wood Year: 1989 _l 1501 < - - â Precipitation â Temperature / - DC LU > LU CO DC 111 1975 76 77 78 79 80 81 82 83 84 85 86 WINTER BEGINNING Fig. 3. Winter severity indices for the Cherry Creek study area, 1975-1987. established as the factor most affecting production of native vegetation in the northern Great Plains (Barker and Whitman 1988). Annual precipitation was below normal during 1976, 1979, 1981, and 1983-1985, when drought conditions prevailed (Fig. 2). Winter co
Ecology of sympatric populations of mule deer and white-tailed deer in a prairie environment ecologyofsympatr1989wood Year: 1989 _l 1501 < - - â Precipitation â Temperature / - DC LU > LU CO DC 111 1975 76 77 78 79 80 81 82 83 84 85 86 WINTER BEGINNING Fig. 3. Winter severity indices for the Cherry Creek study area, 1975-1987. established as the factor most affecting production of native vegetation in the northern Great Plains (Barker and Whitman 1988). Annual precipitation was below normal during 1976, 1979, 1981, and 1983-1985, when drought conditions prevailed (Fig. 2). Winter conditions, characterized by subfreezing temperatures and periodic snowfall, generally prevail from November to March. Average snowfall is about 80 cm, but timing and amounts vary annually; significant accumulations are rare. Winter severity varied widely during 1975-1986 (Fig. 3), based on a modified Leckenby Index 4
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