Thermal physiological traits in tropical lowland amphibians: Vulnerability to climate warming and cooling

PloS One
Rudolf von MayDaniel L Rabosky

Abstract

Climate change is affecting biodiversity and ecosystem function worldwide, and the lowland tropics are of special concern because organisms living in this region experience temperatures that are close to their upper thermal limits. However, it remains unclear how and whether tropical lowland species will be able to cope with the predicted pace of climate warming. Additionally, there is growing interest in examining how quickly thermal physiological traits have evolved across taxa, and whether thermal physiological traits are evolutionarily conserved or labile. We measured critical thermal maximum (CTmax) and minimum (CTmin) in 56 species of lowland Amazonian frogs to determine the extent of phylogenetic conservatism in tolerance to heat and cold, and to predict species' vulnerability to climate change. The species we studied live in sympatry and represent ~65% of the known alpha diversity at our study site. Given that critical thermal limits may have evolved differently in response to different temperature constraints, we tested whether CTmax and CTmin exhibit different rates of evolutionary change. Measuring both critical thermal traits allowed us to estimate species' thermal breadth and infer their potential to respond to abr...Continue Reading

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Citations

Dec 4, 2019·Journal of Thermal Biology·Allison R Litmer, Christopher M Murray
May 5, 2021·The Journal of Animal Ecology·Pol PintanelAndrés Merino-Viteri
Aug 24, 2021·Journal of Thermal Biology·Sonya K AuerJulia Solowey
Oct 23, 2021·Evolution; International Journal of Organic Evolution·Martha M Muñoz
Dec 8, 2021·Global Change Biology·Jim LabiskoJeffrey W Streicher

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Software Mentioned

R package ‘ APE ’
R package ‘ phylolm ’
TreeAnnotator
Tracer
BEAST
R package ‘ phytools ’
GEIGER
WorldClim
LogCombiner

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