Temporal variation in thermal plasticity in a free-ranging subalpine lizard.
Temporal variation in thermal plasticity in a free-ranging subalpine lizard.
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DOI：
10.1016/j.jtherbio.2020.102623
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发表时间：
2020-05
影响因子：
2.7
通讯作者：
E. M. Drummond;A. Senior;Katelyn Hamilton;M. Gardner;G. While;D. G. Chapple
中科院分区：
文献类型：
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作者：
E. M. Drummond;A. Senior;Katelyn Hamilton;M. Gardner;G. While;D. G. Chapple
温度变化的环境对外温动物来说特别具有挑战性，因为生理功能是热依赖性的。因此，在高度季节性环境中的外温动物预计具有更大的热塑性。然而，我们对热塑性的大部分理解来自实验室环境中的受控实验。相对较少的研究调查在自然环境中生活的自由放养动物的热塑性。我们调查了存在的热塑性在一个单一的活动季节在成年男性的自然高海拔人口的白色的石龙子（Liopholis whitii）在澳大利亚东南部。该物种生活在一个永久的家园（岩石裂缝和/或洞穴），便于在整个活动季节重复捕获相同的个体。我们监测了整个场地和活动季节的热变化，并测试了雄性的耐热性和性能。在他们的活动季节里，他们曾三次参加聚会。最高温度和平均温度各不相同的领域网站，并在整个研究期间的温度逐渐上升。时间可塑性的证据被确定在临界最低温度和热耐受宽度，但不是在临界最高温度。热性能也被发现是塑料，但没有明显的时间模式。我们的时间可塑性的结果是一致的，其中许多以前的文献，但这是第一个研究，以确定这些模式在一个自由放养的population.In此外，我们的研究结果表明，性能可能是更多的塑料比以前的文献建议。总的来说，我们的研究强调了需要对实验室和现场研究，以了解生态相关背景下的热塑性。
Thermally variable environments are particularly challenging for ectotherms as physiological functions are thermo-dependent. As a consequence, ectotherms in highly seasonal environments are predicted to have greater thermal plasticity. However, much of our understanding of thermal plasticity comes from controlled experiments in a laboratory setting. Relatively fewer studies investigate thermal plasticity in free-ranging animals living in their natural environment. We investigated the presence of thermal plasticity within a single activity season in adult males of a natural high elevation population of White's skink (Liopholis whitii) in south-eastern Australia. This species lives in a permanent home site (rock crevice and/or burrow), facilitating the repeated capture of the same individuals across the activity season. We monitored the thermal variation across the field site and over the activity season, and tested thermal tolerances and performance of maleL. whitiion three occasions across their activity season. Maximum and average temperatures varied across the field site, and temperatures gradually increased across the study period. Evidence of temporal plasticity was identified in the critical thermal minimum and thermal tolerance breadth, but not in the critical thermal maximum. Thermal performance was also found to be plastic, but no temporal patterns were evident. Our temporal plasticity results are consistent which much of the previous literature, but this is one of the first studies to identify these patterns in a free-ranging population.In addition, our results indicate that performance may be more plastic than previous literature suggests. Overall, our study highlights the need to pair laboratory and field studies in order to understand thermal plasticity in an ecologically relevant context.