produce well-documented food web patterns, instead of statistically inferring likely mechanisms from In an attempt to explain Why are there so many kinds these patterns. The ADBM is a model which c- of animals? Hutchinson (1959) listed and discussed, bines the constraints imposed by body size on many in his productive and fertile paper, several ideas biological variables (allometric of foraging variables) related to diversity of animals or the lack of it, with optimal foraging theory in order to predict including suggestions on possible mechanistic exp- structural properties of...