1. Evolutionary history and past climate change shape the distribution of genetic diversity in terrestrial mammals
- Author
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Stuart C. Brown, Sen Li, Spyros Theodoridis, David Nogués-Bravo, Damien A. Fordham, and Carsten Rahbek
- Subjects
0106 biological sciences ,0301 basic medicine ,LAND ,Science ,media_common.quotation_subject ,Climate Change ,BEHAVIORAL ECOLOGY ,Biodiversity ,General Physics and Astronomy ,Climate change ,Biology ,010603 evolutionary biology ,01 natural sciences ,General Biochemistry, Genetics and Molecular Biology ,Intraspecific competition ,Article ,03 medical and health sciences ,PHYLOGENETIC DIVERSITY ,Phylogenetics ,Animals ,MULTIMODEL INFERENCE ,Macroecology ,lcsh:Science ,Ecosystem ,Phylogeny ,media_common ,MODEL SELECTION ,Mammals ,Genetic diversity ,Multidisciplinary ,Ecology ,SPECIES RICHNESS ,Genetic Variation ,General Chemistry ,respiratory system ,Biological Evolution ,MOLECULAR EVOLUTION ,Phylogenetic diversity ,030104 developmental biology ,Biogeography ,PATTERNS ,BIODIVERSITY ,lcsh:Q ,TEMPO ,human activities ,Diversity (politics) - Abstract
Knowledge of global patterns of biodiversity, ranging from intraspecific genetic diversity (GD) to taxonomic and phylogenetic diversity, is essential for identifying and conserving the processes that shape the distribution of life. Yet, global patterns of GD and its drivers remain elusive. Here we assess existing biodiversity theories to explain and predict the global distribution of GD in terrestrial mammal assemblages. We find a strong positive covariation between GD and interspecific diversity, with evolutionary time, reflected in phylogenetic diversity, being the best predictor of GD. Moreover, we reveal the negative effect of past rapid climate change and the positive effect of inter-annual precipitation variability in shaping GD. Our models, explaining almost half of the variation in GD globally, uncover the importance of deep evolutionary history and past climate stability in accumulating and maintaining intraspecific diversity, and constitute a crucial step towards reducing the Wallacean shortfall for an important dimension of biodiversity., The drivers of genetic diversity (GD) are poorly understood at the global scale. Here the authors show, for terrestrial mammals, that within-species GD covaries with phylogenetic diversity and is higher in locations with more stable past climates. They also interpolate GD for data-poor locations such as the tropics.
- Published
- 2020
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