These authors shared last authorship.
Phylogenetic plant community structure along elevation is lineage specific
Article first published online: 8 NOV 2013
© 2013 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Ecology and Evolution
Volume 3, Issue 15, pages 4925–4939, December 2013
How to Cite
Ecology and Evolution 2013; 3(15): 4925–4939
- Issue published online: 10 DEC 2013
- Article first published online: 8 NOV 2013
- Manuscript Accepted: 19 SEP 2013
- Manuscript Revised: 15 SEP 2013
- Manuscript Received: 3 APR 2013
- Faculty of Biology and Medicine
- Herbette Foundation, University of Lausanne, Switzerland
- Swiss National Science Foundation. Grant Number: CRS113-125240
- AG. Grant Number: 31003A-125145
- European Commission. Grant Number: FP6-ECOCHANGE
- Community structure;
- elevation gradient;
- mountain plants;
- phylogenetic clustering;
- phylogenetic overdispersion.
The trend of closely related taxa to retain similar environmental preferences mediated by inherited traits suggests that several patterns observed at the community scale originate from longer evolutionary processes. While the effects of phylogenetic relatedness have been previously studied within a single genus or family, lineage-specific effects on the ecological processes governing community assembly have rarely been studied for entire communities or flora. Here, we measured how community phylogenetic structure varies across a wide elevation gradient for plant lineages represented by 35 families, using a co-occurrence index and net relatedness index (NRI). We propose a framework that analyses each lineage separately and reveals the trend of ecological assembly at tree nodes. We found prevailing phylogenetic clustering for more ancient nodes and overdispersion in more recent tree nodes. Closely related species may thus rapidly evolve new environmental tolerances to radiate into distinct communities, while older lineages likely retain inherent environmental tolerances to occupy communities in similar environments, either through efficient dispersal mechanisms or the exclusion of older lineages with more divergent environmental tolerances. Our study illustrates the importance of disentangling the patterns of community assembly among lineages to better interpret the ecological role of traits. It also sheds light on studies reporting absence of phylogenetic signal, and opens new perspectives on the analysis of niche and trait conservatism across lineages.