Finding the right thermal limit: a framework to reconcile ecological, physiological and methodological aspects of CTmax in ectotherms.
Finding the right thermal limit: a framework to reconcile ecological, physiological and methodological aspects of CTmax in ectotherms.
复制标题
寻找正确的热极限：协调变温动物 CTmax 的生态、生理和方法学方面的框架。
DOI：
--
复制
发表时间：
2022
影响因子：
2.8
通讯作者：
J. Overgaard
中科院分区：
文献类型：
--
作者：
Michael Ørsted;L. B. Jørgensen;J. Overgaard
温度上限（CTmax）常被用来参数化的基础生态位的变温动物，并推断在当前和未来的气候情景下的地理分布限制。然而，有相当多的争论与方法，生态和生理定义的CTmax。最近（重新）引入的热死时间（TDT）模型已经调和了这些问题中的一些，现在提供了一个坚实的数学基础，模型CTmax考虑强度和持续时间的热应力。然而，这个温度持续时间模型的生理起源和边界仍然未被探索。在经验数据的支持下，我们在这里概述了一个协调框架，该框架集成了TDT模型，该模型在压力温度下运行，经典的热性能曲线（TPC）通常描述在允许温度下的生物功能。此外，我们讨论了TDT模型是如何建立在破坏性和再生生物过程之间的平衡，最终定义了一个临界边界温度（Tc）分离的TDT和TPC模型。总的来说，这个框架允许包括修复和积累的热应力，因此也提供了一个一致的概念方法来理解波动的热条件下的高温的影响。此外，这种协调框架允许改进的实验设计，以了解外温动物耐热性的生理基础和生态后果。
Upper thermal limits (CTmax) are frequently used to parameterize the fundamental niche of ectothermic animals and to infer biogeographical distribution limits under current and future climate scenarios. However, there is considerable debate associated with the methodological, ecological and physiological definitions of CTmax. The recent (re)introduction of the thermal death time (TDT) model has reconciled some of these issues and now offers a solid mathematical foundation to model CTmax by considering both intensity and duration of thermal stress. Nevertheless, the physiological origin and boundaries of this temperature-duration model remain unexplored. Supported by empirical data, we here outline a reconciling framework that integrates the TDT model, which operates at stressful temperatures, with the classic thermal performance curve (TPC) that typically describes biological functions at permissive temperatures. Further, we discuss how the TDT model is founded on a balance between disruptive and regenerative biological processes that ultimately defines a critical boundary temperature (Tc) separating the TDT and TPC models. Collectively, this framework allows inclusion of both repair and accumulation of heat stress, and therefore also offers a consistent conceptual approach to understand the impact of high temperature under fluctuating thermal conditions. Further, this reconciling framework allows improved experimental designs to understand the physiological underpinnings and ecological consequences of ectotherm heat tolerance.
影响因子：
6.4
作者：
Buckley, Lauren B.;Huey, Raymond B.;Kingsolver, Joel G.
通讯作者：
Kingsolver, Joel G.