1. Ricklefs, R. E. Community diversity: relative roles of local and regional processes. Science 235, 167–171 ( 1987).
2. Ricklefs, R. E. & Schluter, D. in Species Diversity in Ecological Communities (eds Ricklefs, R. E. & Schluter, D.) 350–363 (Univ. Chicago Press, Chicago, 1993).
3. MacArthur, R. H. Geographical Ecology: Patterns in the Distribution of Species (Harper and Row, New York, 1972).
4. Currie, D. J. Energy and large-scale patterns of animal species and plant species richness. Am. Nat. 137, 27–49 (1991).
5. Ricklefs, R. E. & Latham, R. E. in Species Diversity in Ecological Communities (eds. Ricklefs, R. E. & Schluter, D.) 215–229 (Univ. Chicago Press, Chicago, 1993).