“…Sheldon, 1969;Peet, 1975), nor empirical studies on field data. The Shannon -Weaver Index seems to have been found unsatisfactory (Dickman, 1968;Bullock, 1971a;Hurlbert, 1971;Room, 1975;Taylor et al, 1976) and in spite of some apparently successful uses (Tramer, 1969;Allan, 1975;Muller et al, 1975) should in general be regarded as a distraction rather than an asset in ecological analysis. It is strongly influenced by ST (species richness) and by the underlying model ( Fig.…”