Key points are not available for this paper at this time.
Donald A. Walker, Marilyn D. Walker, History and Pattern of Disturbance in Alaskan Arctic Terrestrial Ecosystems: A Hierarchical Approach to Analysing Landscape Change, Journal of Applied Ecology, Vol. 28, No. 1 (Apr., 1991), pp. 244-276
Walker et al. (Mon,) studied this question.