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. 2016 Mar 16;116(6):531–541. doi: 10.1038/hdy.2016.14

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Copyright © 2016 The Genetics Society

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/

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Smoothed density of species abundances along four environmental gradients as calculated from 58 sampling plots taken at the Rhône Glacier forefield plus 92 additional samples (46 containing S. helvetica and 46 containing S. purpurea) randomly selected from the Austrian vegetation database. Ellenberg's T, R, F and N values are indicator values of temperature, pH, soil moisture and nutrient availability as computed from the accompanying vegetation. The green, red and blue curves represent densities of S. helvetica, S. purpurea and the hybrid (pooled), respectively. The dashed curve represents the density of the respective environmental variable.