Function to compute the niche overlap between N species along a trait axis (functional or environmental)
generalization of the Niche Overlap index (NO) based on kernel density estimation
of Mouillot et al. 2005 (Oecologia, 145, 345-353)
David Mouillot, Wendy Stubbs, Matthieu Faure, Olivier Dumay, J. Antoine Tomasini, J. Bastow Wilson, Thang Do Chi. Niche overlap estimates based on quantitative functional traits : a new family of non-parametric indices, Oecologia, 2005, Volume 145, Number 3, Page 345