Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA.
J Exp Biol. 2022 Feb 15;225(4). doi: 10.1242/jeb.243422. Epub 2022 Feb 25.
Understanding the energetic consequences of climate change is critical to identifying organismal vulnerabilities, particularly for dormant organisms relying on finite energy budgets. Ecophysiological energy use models predict long-term energy use from metabolic rate, but we do not know the degree to which plasticity in metabolism impacts estimates. We quantified metabolic rate-temperature relationships of dormant willow leaf beetles (Chrysomela aeneicollis) monthly from February to May under constant and variable acclimation treatments. Metabolic rate increased as diapause progressed, and acclimation to variable conditions altered both metabolic intensity and thermal sensitivity. However, incorporating these two types of metabolic plasticity into energy use models did not improve energy use estimates, validated by empirical measurements of energy stores. While metabolic rate-temperature relationships are plastic during winter, the magnitude of inter-individual variability in energy stores overshadows the effects of incorporating plasticity into energy use models, highlighting the importance of within-population variation in energy reserves.
了解气候变化的能量后果对于识别生物脆弱性至关重要，特别是对于依赖有限能量预算的休眠生物。生态生理能量使用模型可以根据代谢率预测长期的能量使用，但我们不知道代谢可塑性对估计的影响程度。我们在恒定和可变驯化处理下，从 2 月到 5 月每月量化休眠柳树甲虫（Chrysomela aeneicollis）的代谢率-温度关系。随着滞育的进展，代谢率增加，对可变条件的驯化改变了代谢强度和热敏感性。然而，将这两种类型的代谢可塑性纳入能量使用模型并没有改善能量使用的估计，这通过能量储存的实证测量得到了验证。虽然冬季期间代谢率-温度关系具有可塑性，但个体间能量储存的变异性很大，超过了将可塑性纳入能量使用模型的影响，突出了能量储备在种群内变化的重要性。
