12 August 2016
Note to all RangeModel users: A brand new version of RangeModel is in the works! It will work under Mac OS 10.9 and above (and probably Windows 8 and above) and will include the Bayesian modeling tools for midpoint attractors used and described in:
Colwell, R. K., N. J. Gotelli, L. A. Ashton, J. Beck, G. Brehm, T. M. Fayle, K. Fiedler, M. L. Forister, M. Kessler, R. L. Kitching, P. Klimes, J. Kluge, J. T. Longino, S. C. Maunsell, C. McCain, J. Moses, S. Noben, K. Sam, L. Sam, A. M. Shapiro, X. Wang, and V. Novotny. 2016. Midpoint attractors and species richness: Modeling the interaction between environmental drivers and geometric constraints. Ecology Letters, Online Early.
10 June 2011
Note to Mac users: RangeModel 5 does not work under Mac OS 10.7 (Lion). A new version may eventually be offered that will work with Lion. Meanwhile, Mac users will need to use a computer with Mac OS 10.6 (Snow Leopard) or earlier, or with Windows 7 (or earlier) under Parallels.
RangeModel is an animated, graphical, freeware application designed to demonstrate the mechanism behind the mid-domain effect (MDE), with tools for exploring the effects of both theoretical and empirical range size frequency distributions (RSFDs) for one-dimensional domains.
In addition, RangeModel 5 can generate the mean predicted pattern of richness, and its 95% confidence intervals, for any arbitrary number of randomizations of range placement for either:
The mid-domain effect is the increasing overlap of species ranges towards the center of a shared, bounded domain due to geometric boundary constraints in relation to the distribution of species' range sizes, producing a peak or plateau of species richness towards the center of the domain. Domains may be spatial, temporal, or funcitional. The MDE References page at this site provides a guide to the growing literature on MDE.
RangeModel 4 runs native under Windows XP or Mac OS X (certified for OS 10.4), with native user interface on each platform.