Predicting Life-History Trade-Offs with Whole-Organism Performance
Predicting Life-History Trade-Offs with Whole-Organism Performance
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DOI：
10.1093/icb/icx073
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发表时间：
2017-08-01
影响因子：
2.6
通讯作者：
Husak, Jerry F.
中科院分区：
文献类型：
--
作者：
Lailvaux, Simon P.;Husak, Jerry F.
整个生物体的性能特征是生物体和环境之间的关键中介。由于性能特征的建立和维护在能量上都是昂贵的，因此在任何给定的时间内，性能将与其他生活史特征竞争有限的获得的能量资源池，从而潜在地导致性能表现方面的权衡。尽管这些权衡对机体适应性有着重要的影响，但我们目前缺乏一个概念框架来预测在哪些地方可能会出现权衡，以及哪些特征可能特别容易与其他与适应性相关的生活史特征进行权衡。我们基于对脊椎动物运动的能量需求和运输的生态成本的估计提出了这样一个框架。通过分析哺乳动物能量预算和生活史的现有数据，我们发现运动成本较高的物种往往是那些“慢”生活史的物种，它们在当前繁殖上的投入相对较少，而不是“快”生活史物种。我们讨论了变温对掩盖这种关系的潜在影响，以及如何在未来扩展这个框架。
Whole-organism performance traits are key intermediaries between the organism and the environment. Because performance traits are energetically costly to both build and maintain, performance will compete with other life-history traits over a limited pool of acquired energetic resources at any given time, potentially leading to trade-offs in performance expression. Although these trade-offs can have important implications for organismal fitness we currently lack a conceptual framework for predicting both where trade-offs might be expected, and which traits may be especially prone to trade-offs with other fitness-related life-history traits. We propose such a framework based on an estimate of the energetic requirements of locomotion in vertebrates, the ecological cost of transport. By analyzing existing data on mammalian energetic budgets and life-history, we found that species with higher costs of locomotion also tended to be those with "slow" life histories that invest relatively less in current reproduction than "fast" life-history species. We discuss the potential implications of ectothermy for masking such relationships, and how this framework might be expanded upon in the future.