Transverse pattern of vegetation on avalanche paths in the northern Rocky Mountains, Montana

Authors

George P. Malanson, Oklahoma State University, Stillwater, Oklahoma
David R. Butler, Oklahoma State University, Stillwater, Oklahoma

Abstract

The pattern of vegetation on avalanche paths has usually been ascribed to the damage done by snowslides. In the northern Rocky Mountains the pattern of herbs, shrubs, and small trees appears to be more complex than could be accounted for by avalanche magnitude and frequency. The vegetation on one path in Montana illustrates that the topography of the path is a factor in the distribution of species. Three zones exist across avalanche paths: an inner zone of herbs and suffrutescent shrubs occupying a ravine, which is snow covered longer than elsewhere; flanking zones of dense shrubs and trees with flexible stems; and an outer zone of less dense shrubs that is more xeric. The pattern of vegetation seems to be due to avalanche-related stress rather than damage.

Recommended Citation

Malanson, George P. and Butler, David R. (1984) "Transverse pattern of vegetation on avalanche paths in the northern Rocky Mountains, Montana," Great Basin Naturalist: Vol. 44: No. 3, Article 9.
Available at: https://scholarsarchive.byu.edu/gbn/vol44/iss3/9