The contribution of contemporary climate to ectothermic and endothermic vertebrate distributions in a glacial refuge
The contribution of contemporary climate to ectothermic and endothermic vertebrate distributions in a glacial refuge
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DOI：
10.1111/j.1466-8238.2009.00488.x
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发表时间：
2010-01-01
影响因子：
6.4
通讯作者：
Rodriguez, Miguel A.
中科院分区：
文献类型：
--
作者：
Aragon, Pedro;Lobo, Jorge M.;Rodriguez, Miguel A.
目的气候因素是影响物种分布的重要因素。然而，阐明潜在的机制是具有挑战性的，因为气候和非气候因素的直接和间接影响是相互关联的。在这种协变的情况下，在细粒分辨率的直接影响气候通过生理约束应该是较强的外温生物的分布。到目前为止，还没有全面的研究明确测试气候对物种分布的影响，通过定量比较外温和吸热的脊椎动物。LocationPeninsular Spain. MethodsPresence的本地陆生脊椎动物在西班牙半岛不存在的数据进行了建模，使用广义添加剂模型解开气候和其他当代相关因素（地形和植被）的影响。我们进行了部分回归划分的偏差解释的气候和非气候的影响到独立和共享的组件。我们比较了独立的贡献，气候和非气候的影响之间的变温和吸热的脊椎动物，哺乳动物，鸟类，爬行动物和两栖动物之间。ResultsAfter减少与非气候因素的协变，气候解释了更大比例的偏离外温动物比内温动物。此外，温度的贡献最大的爬行动物，和两栖动物的贡献最大的降水量，提取后，分别与降水量和温度的重叠。地形和植被的贡献仍然很高的鸟类提取重叠后与climate.Main conclusionsOur结果是一致的预测，在精细的分辨率，气候的直接影响（通过生理约束）范围分布是较强的变温脊椎动物。此外，至少对鸟类来说，气候（通过植物生产力）和其他栖息地特征的间接影响仍然相对重要，一旦它们与气候的协变减少。这项研究表明，控制气候的直接影响，其间接影响和/或其他相关因素，结合功能组之间的比较，可以是一个有用的方法来阐明与生物体的空间格局的因果关系。
AimClimatic factors are known to influence species distributions. However, elucidating the underlying mechanisms is challenging because direct and indirect effects of climatic and non-climatic factors are correlated. In the absence of this covariation and at fine-grain resolutions the direct effect of climate via physiological constraints should be stronger on the distributions of ectothermic organisms. So far, no comprehensive study has explicitly tested the influence of climate on species distributions by quantitatively comparing ectothermic and endothermic vertebrates.LocationPeninsular Spain.MethodsPresence-absence data of native terrestrial vertebrates in Peninsular Spain were modelled using generalized additive models to disentangle the influence of climate and other contemporary correlated factors (topography and plant cover). We performed partial regressions to partition the deviance explained by climatic and non-climatic effects into independent and shared components. We compared the independent contributions of climatic and non-climatic effects between ectothermic and endothermic vertebrates, and among mammals, birds, reptiles and amphibians.ResultsAfter reducing the covariation with non-climatic factors, climate explained a greater proportion of deviance in ectotherms than in endotherms. Also, the contribution of temperature was highest for reptiles, and the contribution of precipitation was highest for amphibians, after extracting their overlaps with precipitation and temperature, respectively. The contribution of topography and plant cover remained high for birds after extracting the overlap with climate.Main conclusionsOur results are consistent with the prediction that, at fine resolutions, the direct influence of climate (via physiological constraints) on range distributions is stronger in ectothermic vertebrates. Also, at least for birds, indirect effects of climate (via plant productivity) and other habitat characteristics remained relatively important once their covariation with climate was reduced. This study shows that controlling the direct effects of climate by their indirect effects and/or other correlated factors, combined with comparisons among functional groups, can be a useful approach to elucidate causal links with the spatial patterns of organisms.