1. Andersen, D. C., MacMahon, J. A. and Wolfe, M. L. (1980) Herbivorous mammals along a montane sere: community structure and energetics. J. Mammal., 61, 500–19.
2. Auclair, A. N. and Goff, F. G. (1971) Diversity relations of upland forests in the western great lakes area. Am. Nat., 105, 499–528.
3. Barkman, J. J. (1979) The investigation of vegetation texture and structure. In The Study of Vegetation (ed. M. J. A. Werger), Junk, The Hague, pp. 125–60.
4. Bazzaz, F. A. (1968) Succession on abandoned fields in the Shawnee Hills, southern Illinois. Ecology, 49, 924–36.
5. Bazzaz, F. A. (1979) The physiological ecology of plant succession. Ann. Rev. Ecol. Syst., 10, 351–71.