Body size and abundance relationship: an index of diversity for herbivores
Source: Biodiversity and Conservation, Volume 10, Number 11, November 2001 , pp. 1921-1929(9)
Abstract:It is evident to any biologist that small-bodied species within a given higher taxon (order, class, phylum, etc.) tend to be represented by more individuals. Hence small-bodied species are generally more abundant than large-bodied species. We analyzed large herbivore species data collected in Kenyan rangelands. An index of biological diversity derived from the negative relation between animal species body size and its local abundance is proposed. We compared the new index with species abundances at landscape scale (10 × 10 km) in individual districts, as well as in the combined regional data. The results show a consistently strong positive relation between the new diversity index and species abundances. The proposed diversity index has the advantage of incorporating information on species abundances without the need for time-consuming surveys.
Document Type: Regular Paper
Affiliations: 1: International Institute for Aerospace Survey and Earth Sciences (ITC), PO Box 6, 7500 AA Enschede, The Netherlands; Oluoch@itc.nl Fax: +31+31-53 4874 399 2: International Institute for Aerospace Survey and Earth Sciences (ITC), PO Box 6, 7500 AA Enschede, The Netherlands 3: Tropical Nature Conservation and Vertebrate Ecology Group, Wageningen University, Bornesteeg 69, 6708 PD Wageningen, The Netherlands
Publication date: 2001-11-01