The first two authors contributed equally to this work, so order of authorship was decided by the ‘coin-flip’ method.
Climatic niche conservatism and the evolutionary dynamics in species range boundaries: global congruence across mammals and amphibians
Article first published online: 13 JUL 2011
© 2011 Blackwell Publishing Ltd
Journal of Biogeography
Volume 38, Issue 12, pages 2237–2247, December 2011
How to Cite
Olalla-Tárraga, M. Á., McInnes, L., Bini, L. M., Diniz-Filho, J. A. F., Fritz, S. A., Hawkins, B. A., Hortal, J., Orme, C. D. L., Rahbek, C., Rodríguez, M. Á. and Purvis, A. (2011), Climatic niche conservatism and the evolutionary dynamics in species range boundaries: global congruence across mammals and amphibians. Journal of Biogeography, 38: 2237–2247. doi: 10.1111/j.1365-2699.2011.02570.x
- Issue published online: 15 NOV 2011
- Article first published online: 13 JUL 2011
- Cold tolerance;
- diversification rates;
- geographic distribution;
- phylogenetic niche conservatism;
- range edges;
- range size
Aim Comparative evidence for phylogenetic niche conservatism – the tendency for lineages to retain their ancestral niches over long time scales – has so far been mixed, depending on spatial and taxonomic scale. We quantify and compare conservatism in the climatic factors defining range boundaries in extant continental mammals and amphibians in order to identify those factors that are most evolutionarily conserved, and thus hypothesized to have played a major role in determining the geographic distributions of many species. We also test whether amphibians show stronger signals of climatic niche conservatism, as expected from their greater physiological sensitivity and lower dispersal abilities.
Location Global; continental land masses excluding Antarctica.
Methods We used nearly complete global distributional databases to estimate the climatic niche conservatism in extant continental mammals and amphibians. We characterized the climatic niche of each species by using a suite of variables and separately investigate conservatism in each variable using both taxonomic and phylogenetic approaches. Finally, we explored the spatial, taxonomic and phylogenetic patterns in recent climatic niche evolution.
Results Amphibians and mammals showed congruent patterns of conservatism in cold tolerance, with assemblages of escapee species (i.e. those escaping most from the climatic constraints of their ancestors) aggregated in the North Temperate Zone.
Main conclusions The relative strength of climatic niche conservatism varies across the variables tested, but is strongest for cold tolerance in both mammals and amphibians. Despite the apparent conservatism in this variable, there is also a strong signal of recent evolutionary shifts in cold tolerance in assemblages inhabiting the North Temperate Zone. Our results thus indicate that distribution patterns of both taxa are influenced by both niche conservatism and niche evolution.