1936] 



MAMMALS AND LIFE ZONES OF OREGON 



25 



Game and fur-bearing animals can be considered a legitimate 

 crop, and much of the Transition Zone, both in the timbered and in 

 the treeless arid divisions, is especially adapted to their production. 

 The wildlife of the forests if well handled is often as valuable as 

 any other forest product. 



CANADIAN ZONE 



The Canadian Zone in Oregon covers all but the high peaks 4 and 

 ridges of the higher Cascade, Siskiyou, Blue, and Steens Mountains, 

 and caps many of the lower groups, such as the Paulina, Yamsey, 

 Winter, and Warner Kanges. On Mount Hood at the northern end 

 of the Cascades in Oregon, with a 100-foot base level around three 

 sides of the mountain, the zone runs correspondingly low (fig. 1), 



N.E. 



FIGURE 1. Life zones on Mount Hood from northeast to southwest exposures, with low 

 base level on both sides and the zones consequently running low. 



reaching from 3,000 to 5,000 feet on the cold northeast slopes and 

 from about 4,000 to 6,000 feet on warmer southwest slopes. This 

 lowering of the life zones, in addition to the great height of the 

 peak, accounts for the magnificent display of ice and snow above 

 timber line on Mount Hood. 



I0,53 feet 



S.W. 



N.E. 



FIGURE 2. Life zones on Mount Jefferson from northeast to southwest exposures, show- 

 ing approximate altitudes above sea level and slight elevation due to higher base level. 



