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Environmental temperatures shape thermal physiology as well as diversification and genome-wide substitution rates in lizards.

ABSTRACT: Climatic conditions changing over time and space shape the evolution of organisms at multiple levels, including temperate lizards in the family Lacertidae. Here we reconstruct a dated phylogenetic tree of 262 lacertid species based on a supermatrix relying on novel phylogenomic datasets and fossil calibrations. Diversification of lacertids was accompanied by an increasing disparity among occupied bioclimatic niches, especially in the last 10 Ma, during a period of progressive global cooling. Temperate species also underwent a genome-wide slowdown in molecular substitution rates compared to tropical and desert-adapted lacertids. Evaporative water loss and preferred temperature are correlated with bioclimatic parameters, indicating physiological adaptations to climate. Tropical, but also some populations of cool-adapted species experience maximum temperatures close to their preferred temperatures. We hypothesize these species-specific physiological preferences may constitute a handicap to prevail under rapid global warming, and contribute to explaining local lizard extinctions in cool and humid climates.

SUBMITTER: Garcia-Porta J

PROVIDER: S-EPMC6733905 | biostudies-other | 2019 Sep

REPOSITORIES: biostudies-other

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Environmental temperatures shape thermal physiology as well as diversification and genome-wide substitution rates in lizards.

Garcia-Porta Joan J Irisarri Iker I Kirchner Martin M Rodríguez Ariel A Kirchhof Sebastian S Brown Jason L JL MacLeod Amy A Turner Alexander P AP Ahmadzadeh Faraham F Albaladejo Gonzalo G Crnobrnja-Isailovic Jelka J De la Riva Ignacio I Fawzi Adnane A Galán Pedro P Göçmen Bayram B Harris D James DJ Jiménez-Robles Octavio O Joger Ulrich U Jovanović Glavaš Olga O Karış Mert M Koziel Giannina G Künzel Sven S Lyra Mariana M Miles Donald D Nogales Manuel M Oğuz Mehmet Anıl MA Pafilis Panayiotis P Rancilhac Loïs L Rodríguez Noemí N Rodríguez Concepción Benza B Sanchez Eugenia E Salvi Daniele D Slimani Tahar T S'khifa Abderrahim A Qashqaei Ali Turk AT Žagar Anamarija A Lemmon Alan A Moriarty Lemmon Emily E Carretero Miguel Angel MA Carranza Salvador S Philippe Hervé H Sinervo Barry B Müller Johannes J Vences Miguel M Wollenberg Valero Katharina C KC

Nature communications 20190909 1

Climatic conditions changing over time and space shape the evolution of organisms at multiple levels, including temperate lizards in the family Lacertidae. Here we reconstruct a dated phylogenetic tree of 262 lacertid species based on a supermatrix relying on novel phylogenomic datasets and fossil calibrations. Diversification of lacertids was accompanied by an increasing disparity among occupied bioclimatic niches, especially in the last 10 Ma, during a period of progressive global cooling. Tem ...[more]

PMID: 31501432

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Project description:BackgroundMorphological diversity among closely related animals can be the result of differing growth patterns. The Australian radiation of agamid lizards (Amphibolurinae) exhibits great ecological and morphological diversity, which they have achieved on a continent-wide scale, in a relatively short period of time (30 million years). Amphibolurines therefore make an ideal study group for examining ontogenetic allometry. We used two-dimensional landmark-based geometric morphometric methods to characterise the postnatal growth patterns in cranial shape of 18 species of amphibolurine lizards and investigate the associations between cranial morphology, and life habit and phylogeny.ResultsFor most amphibolurine species, juveniles share a similar cranial phenotype, but by adulthood crania are more disparate in shape and occupy different sub-spaces of the total shape space. To achieve this disparity, crania do not follow a common post-natal growth pattern; there are differences among species in both the direction and magnitude of change in morphospace. We found that these growth patterns among the amphibolurines are significantly associated with ecological life habits. The clade Ctenophorus includes species that undergo small magnitudes of shape change during growth. They have dorsoventrally deep, blunt-snouted skulls (associated with terrestrial lifestyles), and also dorsoventrally shallow skulls (associated with saxicolous lifestyles). The sister clade to Ctenophorus, which includes the bearded dragon (Pogona), frill-neck lizard (Chlamydosaurus), and long-nosed dragon (Gowidon), exhibit broad and robust post-orbital regions and differing snout lengths (mainly associated with scansorial lifestyles).ConclusionsAustralian agamids show great variability in the timing of development and divergence of growth trajectories which results in a diversity of adult cranial shapes. Phylogenetic signal in cranial morphology appears to be largely overwritten by signals that reflect life habit. This knowledge about growth patterns and skull shape diversity in agamid lizards will be valuable for placing phylogenetic, functional and ecological studies in a morphological context.

Dataset Information

Environmental temperatures shape thermal physiology as well as diversification and genome-wide substitution rates in lizards.

Publications

Environmental temperatures shape thermal physiology as well as diversification and genome-wide substitution rates in lizards.

Similar Datasets

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