Kirk M. Stueve, Rachel E. Isaacs, Lucy E. Tyrrell, and Roseann V. Densmore. 2011. Spatial variability of biotic and abiotic tree establishment constraints across a treeline ecotone in the Alaska Range. Ecology 92:496–506.

Appendix G. Tree establishment in relation to the four less important, yet statistically significant variables.

FIG. G1. For each category, we divided the number of pixels that experienced establishment from the stratified random sampling scheme by the total number of pixels potentially suitable for establishment, and multiplied by 100.