Ministry Key Laboratory of Mariculture, Fisheries College, Ocean University of China, Qingdao, 266001, China.
Ministry Key Laboratory of Mariculture, Fisheries College, Ocean University of China, Qingdao, 266001, China.
Mar Environ Res. 2023 Nov;192:106212. doi: 10.1016/j.marenvres.2023.106212. Epub 2023 Sep 27.
Ignoring intraspecific variations can prevent us from accurately assessing species' thermal sensitivity to global warming. Individual-based physiological performance provides a feasible solution to depict species' thermal sensitivity using a bottom-up approach. We measured the cardiac performance of intertidal bivalves (1159 individuals from multiple populations of six bivalves), determined the upper thermal limit of each individual, calculated the proportions of individuals suffering sublethal/lethal heat stress, and mapped sensitive regions to high temperatures. Results showed that high inter-individual variations of physiological performance existed in levels of populations and species, and species' thermal sensitivity was positively related to the intraspecific variations of heat tolerance. This bottom-up approach scaled up from individual, population to species emphasizes the importance of individual-based physiology performance in assessing thermal sensitivity across different hierarchical levels and enables better evaluating and forecasting of species responses to global warming.
忽略种内变异可能会使我们无法准确评估物种对全球变暖的热敏感性。基于个体的生理表现为采用自下而上的方法来描述物种的热敏感性提供了可行的解决方案。我们测量了潮间带双壳类动物（来自六个双壳类动物的多个种群的 1159 个个体）的心脏性能，确定了每个个体的上限热极限，计算了个体遭受亚致死/致死热胁迫的比例，并绘制了对高温敏感的区域。结果表明，种群和物种水平存在较高的生理表现个体间变异性，物种的热敏感性与耐热性的种内变异性呈正相关。这种自下而上的方法从个体、种群扩展到物种，强调了基于个体的生理表现对评估不同层次热敏感性的重要性，并能够更好地评估和预测物种对全球变暖的反应。
