Volume 47, Issue 5 pp. 1130-1142
RESEARCH PAPER

Evolutionary history of Neotropical savannas geographically concentrates species, phylogenetic and functional diversity of lizards

Jessica Fenker

Corresponding Author

Jessica Fenker

Division of Ecology and Evolution, Australian National University, Canberra, Australia

Correspondence

Jessica Fenker, Division of Ecology and Evolution, Australian National University, Canberra, Australia.

Email: [email protected]

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Fabricius M. C. B. Domingos

Fabricius M. C. B. Domingos

Departamento de Zoologia, Universidade Federal do Paraná, Curitiba, PR, Brasil

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Leonardo G. Tedeschi

Leonardo G. Tedeschi

Division of Ecology and Evolution, Australian National University, Canberra, Australia

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Dan F. Rosauer

Dan F. Rosauer

Division of Ecology and Evolution, Australian National University, Canberra, Australia

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Fernanda P. Werneck

Fernanda P. Werneck

Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus, AM, Brasil

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Guarino R. Colli

Guarino R. Colli

Departamento de Zoologia, Universidade de Brasília, Brasília, DF, Brasil

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Roger M. D. Ledo

Roger M. D. Ledo

Instituto Federal de Educação, Ciência e Tecnologia de Brasília, Samambaia, DF, Brasil

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Emanuel M. Fonseca

Emanuel M. Fonseca

Department of Evolution, Ecology and Organismal Biology, The Ohio State University, Columbus, OH, USA

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Adrian A. Garda

Adrian A. Garda

Departamento de Botânica e Zoologia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brasil

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Derek Tucker

Derek Tucker

School of Life Sciences, Arizona State University, Temp, AZ, USA

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Jack W. Sites Jr.

Jack W. Sites Jr.

Department of Biology and M.L. Bean Life Science Museum, Brigham Young University, Provo, UT, USA

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Maria F. Breitman

Maria F. Breitman

Department of Biology, University of Missouri, St. Louis, MO, USA

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Flávia Soares

Flávia Soares

Departamento de Genética e Morfologia, Universidade de Brasília, Brasília, DF, Brasil

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Lilian G. Giugliano

Lilian G. Giugliano

Departamento de Genética e Morfologia, Universidade de Brasília, Brasília, DF, Brasil

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Craig Moritz

Craig Moritz

Division of Ecology and Evolution, Australian National University, Canberra, Australia

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First published: 26 January 2020
Citations: 19
Handling Editor: David Chapple

Abstract

Aim

Understanding where and why species diversity is geographically concentrated remains a challenge in biogeography and macroevolution. This is true for the Cerrado, the most biodiverse tropical savanna in the world, which has experienced profound biodiversity loss. Previous studies have focused on a single metric (species composition), neglecting the fact that ‘species’ within the biome are often composed of cryptic species. In order to identify biodiversity hotspots more robustly and across multiple dimensions we integrate functional, spatial and new phylogeographic data for the Cerrado lizard fauna by (a) mapping the spatial patterns of species and phylogenetic diversity; and (b) using endemism measures to identify areas of unique diversity. We then quantify the extent to which existing protected areas represent the diversity.

Location

Brazilian savanna (Cerrado).

Methods

We generated species distribution models using distribution records for all Cerrado lizard species. These, combined with mitochondrial DNA phylogenies and natural history data, allowed us to map species richness, phylogenetic and functional diversity and phylogenetic and weighted endemism. Phylogenetic endemism maps were then cross-referenced against protected areas to calculate the amount of evolutionary history preserved within these areas.

Results

The central region of the Cerrado, a vast and climatically stable plateau, stands out as important under all biodiversity metrics. Including evolutionary relationships in biodiversity assessment, we detected four regional hotspots with high concentration of spatially restricted evolutionary diversity. Protected areas cover only 10% of the Cerrado area and hold 11.64% of the summed phylogenetic endemism of all lizards in the biome.

Main Conclusions

We highlighted both stable (Chapada dos Veadeiros and Serra do Espinhaço plateaus) and environmentally heterogenous regions (Araguaia and Tocantins valleys) as hotspots of evolutionary diversity. The creation and/or manipulation of areas for conservation are essential for the conservation and survival of the rich and endemic lizard fauna of the Cerrado.

DATA AVAILABILITY STATEMENT

Supporting data is available at Data S1, S2 and S3. Scripts to compute the diversity and endemism indices are made available by Dan Rosauer (https://github.com/DanRosauer/phylospatial), https://doi.org/10.5061/dryad.m0cfxpp05

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