. Distribution of mammals in Colorado. Mammals. 1972 ARMSTRONG: COLORADAN MAMMALS 363 FAUNAL ELEMENT Legend Upper Sonoran / sfsS /{/ //V. CUMULATIVE PERCENTAGE COMPOSITION Fig. 131. Cumulative percentage composition of mammalian component of Coloradan life-zones attribut- able to each areographic faunal element. Chihuahuan species drop out, and highland kinds, especially those of the Boreo-cordil- leran element, evince a concomitant in- crease in importance. The coniferous forest "closes up" at the interface between Transi- tion and Canadian life-zones. The Canadian and Hudsonian zon
RMRCCG1Y. Distribution of mammals in Colorado. Mammals. 1972 ARMSTRONG: COLORADAN MAMMALS 363 FAUNAL ELEMENT Legend Upper Sonoran / sfsS /{/ //V. CUMULATIVE PERCENTAGE COMPOSITION Fig. 131. Cumulative percentage composition of mammalian component of Coloradan life-zones attribut- able to each areographic faunal element. Chihuahuan species drop out, and highland kinds, especially those of the Boreo-cordil- leran element, evince a concomitant in- crease in importance. The coniferous forest "closes up" at the interface between Transi- tion and Canadian life-zones. The Canadian and Hudsonian zon