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Synchronization of seasonal acclimatization and short‐term heat hardening improves physiological resilience in a changing climate
Functional Ecology ( IF 4.6 ) Pub Date : 2021-01-28 , DOI: 10.1111/1365-2435.13768 Wen‐yi Zhang 1, 2 , Kenneth B. Storey 3 , Yun‐wei Dong 4, 5
中文翻译：
季节性适应和短期热硬化的同步提高了气候变化中的生理适应能力
更新日期：2021-03-08
Functional Ecology ( IF 4.6 ) Pub Date : 2021-01-28 , DOI: 10.1111/1365-2435.13768 Wen‐yi Zhang 1, 2 , Kenneth B. Storey 3 , Yun‐wei Dong 4, 5
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- Animal survival and species distribution in the face of global warming and increasing occurrences of heatwave largely depend on how heat tolerance shifts with plastic responses at different spatiotemporal scales, including long‐term acclimation/acclimatization and short‐term heat hardening. However, knowledge about the interaction of these plastic responses is still unclear.
- To understand how plastic responses at different time‐scales work together to adjust heat tolerance of organisms, we examined the effect of heat hardening on the upper thermal limits of an intertidal mudflat bivalve, the razor clam Sinonovacula constricta, for different seasons using heart rate as a proxy.
- We observed a stronger heat hardening response of S. constricta in warm seasons, implying that heat hardening worked synchronously with seasonal acclimatization to increase resistance of the clams to high temperatures in warm seasons. In warm seasons, heat hardening increased heat tolerance by 2–4°C and showed a 24‐hr temporal dependence, suggesting an adaptation to the diel fluctuation of thermal regimes in summer.
- Furthermore, thermal stress resembling seasonal maximum environmental temperature induced stronger heat hardening effects, indicating that heat hardening is an essential plastic response to extreme hot weather, complementing seasonal acclimatization.
- Our results suggest that high temperature risk can be alleviated jointly by seasonal acclimatization and heat hardening, and emphasize the importance of considering physiological plasticity on both long‐term and short‐term temporal scales in evaluating and forecasting vulnerability of organisms to climate change.
中文翻译：
季节性适应和短期热硬化的同步提高了气候变化中的生理适应能力
- 面对全球变暖和热浪增加，动物的生存和物种分布在很大程度上取决于不同时空尺度下耐热性如何随着塑性响应而变化，包括长期适应/适应和短期热硬化。但是，有关这些可塑性反应的相互作用的知识仍不清楚。
- 要了解塑料的反应在不同的时间尺度共同调节生物体的耐热性，我们研究了热对潮间带滩涂贝类，蛏的上热极限硬化效果缢蛏，针对不同的季节使用心脏率代理人。
- 我们在温暖的季节观察到了收缩链球菌的更强的热硬化响应，这意味着热硬化与季节性驯化同步进行，以增加蛤warm在温暖的季节对高温的抵抗力。在温暖的季节，热硬化使耐热性提高了2-4°C，并表现出24小时的时间依赖性，这表明在夏天适应了热态的diel波动。
- 此外，类似于季节性最高环境温度的热应力引起更强的热硬化效果，表明热硬化是对极端炎热天气的必不可少的塑性响应，补充了季节性适应。
- 我们的结果表明，通过季节性适应和热硬化可以共同缓解高温风险，并强调在评估和预测生物体对气候变化的脆弱性时，考虑长期和短期时间尺度上的生理可塑性的重要性。
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