This page provides links to data that were generated for and presented in Stralberg et al. 2018 (full citation below). These data represent the distribution of potential climatic refugia given projected end-of-century climate conditions. Refugia indices are based on calculations of individual species’ niche-based velocity (biotic velocity), which are derived from species distribution model projections for 324 tree species (McKenney et al. 2011b) and 268 songbird species (Distler et al. 2015). Underlying downscaled climate model projections are from McKenney et al. (2011a). At a species level, the refugia index is based on a negative-exponential distance decay function, which strongly down-weights locations that are far away from currently suitable climate space. For the multi-species index, species with projected increases in suitable niche space are down-weighted. Details are given in Stralberg, D, Carroll, C., Wilsey, C., Pedlar, J., McKenney, D. & Nielsen, S. 2018. "Macrorefugia for North American trees and songbirds: climatic limiting factors and multi-scale topographic influences. Global Ecology and Biogeography. https://doi.org/10.1111/geb.12731(pdf available on request from first author, and read-only version available here).

Data

The archives linked below provides results from the study in two alternative zipfile formats. The 7-zip format allows smaller file sizes, but requires the 7-zip software for extraction. 7-zip software is freely available for Windows (link) as well as Mac and Linux systems (link).

These data have been prepared as part of the AdaptWest project and their development was funded by the Wilburforce Foundation.

Additional refugia data specific to boreal passerine birds, developed by D. Stralberg in association with the Boreal Avian Modelling project, is available at http://doi.org/10.5281/zenodo.1299880.