Environmental variation is a major predictor of global trait turnover in mammals

Holt, Ben G.; Costa, Gabriel C.; Penone, Caterina; Lessard, Jean-Philippe; Brooks, Thomas M.; Davidson, Ana D.; Blair Hedges, S.; Radeloff, Volker C.; Rahbek, Carsten; Rondinini, Carlo; Graham, Catherine H. (2018). Environmental variation is a major predictor of global trait turnover in mammals. Journal of Biogeography, 45(1), pp. 225-237. Blackwell Scientific Publications 10.1111/jbi.13091

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Aim To evaluate how environment and evolutionary history interact to influence global patterns of mammal trait diversity (a combination of 14 morphological and life-history traits). Location The global terrestrial environment. Taxon Terrestrial mammals. Methods We calculated patterns of spatial turnover for mammalian traits and phylogenetic lineages using the mean nearest taxon distance. We then used a variance partitioning approach to establish the relative contribution of trait conservatism, ecological adaptation and clade specific ecological preferences on global trait turnover. Results We provide a global scale analysis of trait turnover across mammalian terrestrial assemblages, which demonstrates that phylogenetic turnover by itself does not predict trait turnover better than random expectations. Conversely, trait turnover is consistently more strongly associated with environmental variation than predicted by our null models. The influence of clade-specific ecological preferences, reflected by the shared component of phylogenetic turnover and environmental variation, was considerably higher than expectations. Although global patterns of trait turnover are dependent on the trait under consideration, there is a consistent association between trait turnover and environmental predictive variables, regardless of the trait considered. Main conclusions Our results suggest that changes in phylogenetic composition are not always coupled with changes in trait composition on a global scale and that environmental conditions are strongly associated with patterns of trait composition across species assemblages, both within and across phylogenetic clades.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Ecology
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Penone, Caterina

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0305-0270

Publisher:

Blackwell Scientific Publications

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

31 Jan 2018 18:45

Last Modified:

31 Jan 2018 18:45

Publisher DOI:

10.1111/jbi.13091

BORIS DOI:

10.7892/boris.108943

URI:

https://boris.unibe.ch/id/eprint/108943

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