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首页> 外文OA文献 >Interspecies physiological variation as a tool for cross-species assessments of global warming-induced endangerment: validation of an intrinsic determinant of macroecological and phylogeographic structure
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Interspecies physiological variation as a tool for cross-species assessments of global warming-induced endangerment: validation of an intrinsic determinant of macroecological and phylogeographic structure

机译：物种间的生理变异作为全球变暖引发的濒危物种间评估的一种工具：宏观生态学和系统地理结构的内在决定因素的验证

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Global warming is now recognized as the dominant threat to biodiversity because even protected populations and habitats are susceptible. Nonetheless, current criteria for evaluating species' relative endangerment remain purely ecological, and the accepted conservation strategies of habitat preservation and population management assume that species can mount ecological responses if afforded protection. The insidious threat from climate change is that it will attenuate or preclude ecological responses by species that are physiologically constrained; yet, quantitative, objective criteria for assessing relative susceptibility of diverse taxa to warming-induced stress are wanting. We explored the utility of using interspecies physiological variation for this purpose by relating species' physiological phenotypes to landscape patterns of ecological and genetic exchange. Using a salamander model system in which ecological, genetic and physiological diversity are well characterized, we found strong quantitative relationships of basal metabolic rates (BMRs) to both macroecological and phylogeographic patterns, with decreasing BMR leading to dispersal limitation (small contemporary ranges with marked phylogeographic structure). Measures of intrinsic physiological tolerance, which vary systematically with macroecological and phylogeographic patterns, afford objective criteria for assessing endangerment across a wide range of species and should be incorporated into conservation assessment criteria that currently rely exclusively upon ecological predictors.
机译：现在，全球变暖已被视为对生物多样性的主要威胁，因为即使受保护的人口和栖息地也容易受到影响。尽管如此，目前评估物种相对濒危的标准仍纯粹是生态学，并且公认的栖息地保护和人口管理保护策略认为，只要提供保护，物种就可以做出生态反应。气候变化的潜在威胁是，它将削弱或排除受到生理限制的物种的生态反应；但是，需要一种定量，客观的标准来评估各种生物分类对变暖引起的胁迫的相对敏感性。通过将物种的生理表型与生态和遗传交换的景观模式相关联，我们探索了利用种间生理变异实现此目的的实用性。使用a模型系统，其中生态，遗传和生理多样性得到了很好的表征，我们发现基础代谢率（BMR）与宏观生态学和系统地理学模式之间存在很强的定量关系，随着BMR的降低，导致了扩散限制（较小的当代范围，具有明显的系统地理学）结构体）。内在生理耐受性的测量随宏观生态学和系统地理学的系统发生变化，为评估各种物种的濒危提供了客观标准，应纳入目前仅依赖于生态预测因子的保护评估标准。

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