Environmental temperatures shape thermal physiology as well as diversification and genome-wide substitution rates in lizards
Environmental temperatures shape thermal physiology as well as diversification and genome-wide substitution rates in lizards
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DOI：
10.1038/s41467-019-11943-x
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发表时间：
2019-09-09
影响因子：
16.6
通讯作者：
Valero, Katharina C. Wollenberg
中科院分区：
文献类型：
--
作者：
Garcia-Porta, Joan;Irisarri, Iker;Valero, Katharina C. Wollenberg
随着时间和空间的变化，气候条件在多个层面上塑造了生物的进化，包括Lacertidae科的温带蜥蜴。在这里，我们基于一个超矩阵，基于新的系统基因组数据集和化石校准，重建了262个lacertid物种的系统发育树。乳酸菌的多样化伴随着生物气候生态位之间的差异，特别是在最近10 Ma全球逐渐变冷期间。与适应热带和沙漠的乳杆菌相比，温带物种的分子取代率也在全基因组范围内减慢。蒸发失水和偏好温度与生物气候参数相关，表明对气候的生理适应。热带，但也有一些适应寒冷的物种种群的最高温度接近它们喜欢的温度。我们假设这些物种特有的生理偏好可能构成了在快速全球变暖下生存的障碍，并有助于解释在凉爽和潮湿气候下当地蜥蜴的灭绝。
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 genomewide 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.