Abstract：
The predicted rise of global temperatures is of major concern for ectotherms because of its direct impact on their behavior and physiology. As physiological performance mediates a species\' resilience to warming exposure, physiological plasticity could greatly reduce the susceptibility to climate change. We studied the degree to which Diplolaemus leopardinus lizards are able to adjust behavioral and physiological traits in response to short periods of temperature change. We used a split cross design to measure the acclimation response of preferred body temperature (Tp), and the thermal performance curve of resting metabolic rate (RMR) and evaporative water loss (EWL). Our results showed that plasticity differs among traits: whereas Tp and EWL showed lower values in warm conditions, the body temperature at which RMR was highest increased. Moreover, RMR was affected by thermal history, showing a large increase in response to cold exposure in the group initially acclimated to warm temperatures. The reduction of EWL and the increase in optimal temperature will give lizards the potential to partially mitigate the impact of rising temperatures in the energy cost and water balance. However, the decrease in Tp and the sensitivity to the warm thermal history of RMR could be detrimental to the energy net gain, increasing the species\' vulnerability, especially considering the increase of heat waves predicted for the next 50 years. The integration of acclimation responses in behavioral and physiological traits provides a better understanding of the range of possible responses of lizards to cope with the upcoming climatic and environmental modifications expected as a result of climate change.
摘要：
全球温度的预测上升是外热的主要关注点，因为它直接影响它们的行为和生理。由于生理性能介导了物种对变暖暴露的复原力，生理可塑性可以大大降低对气候变化的敏感性。我们研究了DiplolaemusLeopardinuslizards能够响应短时间的温度变化而调整行为和生理特征的程度。我们使用分裂交叉设计来测量首选体温(Tp)的适应响应，以及静息代谢率(RMR)和蒸发失水率(EWL)的热性能曲线。我们的结果表明，可塑性在性状之间有所不同：而Tp和EWL在温暖条件下显示出较低的值，RMR最高时的体温升高。此外，RMR受到热历史的影响，在最初适应温暖温度的组中，对寒冷暴露的反应显着增加。EWL的降低和最佳温度的升高将使蜥蜴具有部分减轻温度升高对能源成本和水平衡的影响的潜力。然而,Tp的降低和对RMR的热热历史的敏感性可能不利于能量净增益，增加物种的脆弱性，特别是考虑到未来50年热浪的增加。在行为和生理特征中整合适应反应可以更好地了解蜥蜴可能的反应范围，以应对由于气候变化而导致的即将到来的气候和环境变化。
