Burak, Not exactly clear what you want, but Lu et al. 2007 describes the differentiation coefficient D that is the sum(beta)/sum(gamma) and can be obtained as attributes(contribdiv(x))$diff.coef . Note also that there is a link between diversity partitions and distance indices so you might as well use the components from the contribution diversity approach. Or is it something like irreplaceability in the reserve selection literature you need? Cheers, Peter
Péter Sólymos Alberta Biodiversity Monitoring Institute and Boreal Avian Modelling project Department of Biological Sciences CW 405, Biological Sciences Bldg University of Alberta Edmonton, Alberta, T6G 2E9, Canada Phone: 780.492.8534 Fax: 780.492.7635 email <- paste("solymos", "ualberta.ca", sep = "@") On Wed, Dec 1, 2010 at 11:17 AM, Pekin, Burak K <bpe...@purdue.edu> wrote: > Hello, Is there a diversity index similar to the 'contribution diversity > approach' contribdiv()in vegan that reflects only the compositional > 'distinctiveness' of a site within a region. contribdiv()combines > 'distinctiveness' with a within-site diversity measure such as richness, I on > the other hand am looking for an index that measures only the relative number > of species within a site that are 'distinct' or 'unique' within a region. > > Cheers, > Burak > > > [[alternative HTML version deleted]] > > _______________________________________________ > R-sig-ecology mailing list > R-sig-ecology@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-ecology > > _______________________________________________ R-sig-ecology mailing list R-sig-ecology@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-ecology