Climate-mediated energetic constraints on the distribution of hibernating mammals
Climate-mediated energetic constraints on the distribution of hibernating mammals
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DOI：
10.1038/nature00828
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发表时间：
2002-07-18
期刊：
影响因子：
64.8
通讯作者：
Speakman, JR
中科院分区：
文献类型：
--
作者：
Humphries, MM;Thomas, DW;Speakman, JR
为了预测人类引起的全球气候变化的后果，我们需要了解气候是如何与生物地理联系在一起的(1)。能量约束通常被用来解释动物的分布，并且已知生理参数沿分布梯度变化(2)。但是气候和动物生物地理之间的因果关系在很大程度上仍然是模糊的（2,3）。在这里，我们开发了一个生物能量模型来预测哺乳动物在不同气候条件下冬眠的可行性。作为一个例子，我们使用小棕蝠（Myotis lucifugus）的冬眠能量学来参数化模型(4)。我们的模型预测了环境温度对冬季总能量需求的显著影响，以及冬眠温度和冬季长度的相对狭窄的组合，从而允许成功冬眠。小生境和北部分布范围与模型预测一致，表明冬眠能量的热依赖性制约了该物种的生物地理特征。将气候变化的预测整合到我们的模型中，预测在未来80年内，冬眠蝙蝠的范围将向北扩张。生物能量学可以提供预测气候变化后果所需的气候和生物地理学之间的简单联系。
To predict the consequences of human-induced global climate change, we need to understand how climate is linked to biogeography(1). Energetic constraints are commonly invoked to explain animal distributions, and physiological parameters are known to vary along distributional gradients(2). But the causal nature of the links between climate and animal biogeography remain largely obscure(2,3). Here we develop a bioenergetic model that predicts the feasibility of mammalian hibernation under different climatic conditions. As an example, we use the well-quantified hibernation energetics of the little brown bat (Myotis lucifugus) to parameterize the model(4). Our model predicts pronounced effects of ambient temperature on total winter energy requirements, and a relatively narrow combination of hibernaculum temperatures and winter lengths permitting successful hibernation. Microhabitat and northern distribution limits of M. lucifugus are consistent with model predictions, suggesting that the thermal dependence of hibernation energetics constrains the biogeography of this species. Integrating projections of climate change into our model predicts a pronounced northward range expansion of hibernating bats within the next 80 years. Bioenergetics can provide the simple link between climate and biogeography needed to predict the consequences of climate change.