On the thermodynamic origin of metabolic scaling.
On the thermodynamic origin of metabolic scaling.
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关于代谢缩放的热力学起源。
DOI：
10.1038/s41598-018-19853-6
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发表时间：
2018-01-23
影响因子：
4.6
通讯作者：
Moya A
中科院分区：
文献类型：
--
作者：
Ballesteros FJ;Martinez VJ;Luque B;Lacasa L;Valor E;Moya A
代谢标度的起源和形状一直存在争议，因为Kleiber发现动物的基础代谢率似乎是以其体重的幂律变化的，指数为3/4，而不是2/3，因为表面体积参数预测。指数3/4的普遍性-声称在营养网络的分形特性-最近受到挑战，根据经验证据，观察到大量的强大的指数偏离3/4。在这里，我们提出了一个概念上简单的热力学框架，其中的代谢率与体重的依赖性出现之间的权衡作为热量和能量有效地使用的有机体来维持其代谢的能量耗散。这种平衡调整了加性模型的形状，从加性模型中可以恢复不同的有效标度作为特定的情况，从而在统一的框架下调和哺乳动物，鸟类，昆虫甚至植物中先前不一致的经验证据。这个模型是生物学的动机，非常适合数据，也解释了其他功能，如能量损失之间的关系，热量和质量，不同的气候环境的作用和影响或吸热和外温之间的差异。
The origin and shape of metabolic scaling has been controversial since Kleiber found that basal metabolic rate of animals seemed to vary as a power law of their body mass with exponent 3/4, instead of 2/3, as a surface-to-volume argument predicts. The universality of exponent 3/4 -claimed in terms of the fractal properties of the nutrient network- has recently been challenged according to empirical evidence that observed a wealth of robust exponents deviating from 3/4. Here we present a conceptually simple thermodynamic framework, where the dependence of metabolic rate with body mass emerges from a trade-off between the energy dissipated as heat and the energy efficiently used by the organism to maintain its metabolism. This balance tunes the shape of an additive model from which different effective scalings can be recovered as particular cases, thereby reconciling previously inconsistent empirical evidence in mammals, birds, insects and even plants under a unified framework. This model is biologically motivated, fits remarkably well the data, and also explains additional features such as the relation between energy lost as heat and mass, the role and influence of different climatic environments or the difference found between endotherms and ectotherms.
关于代谢缩放的热力学起源。
影响因子：
4.6
作者：
Ballesteros FJ;Martinez VJ;Luque B;Lacasa L;Valor E;Moya A
通讯作者：
Moya A