Species at risk of extinction are not uniformly distributed in space. Concentrations of threatened species may occur where threatening processes are intense, in refuges from those processes, or in areas of high species diversity. However, there have been few attempts to identify the processes that explain the distribution of at‐risk species. Here, we identified the relative importance of biological traits, environmental factors, and anthropogenic stressors in driving the spatial patterns of both total and at‐risk species richness of North American mammals and birds. Environmental factors are the predominant drivers of both total and at‐risk species richness. Strikingly, the directions of variable relationships differ substantially between models of total and at‐risk species richness. Understanding how environmental gradients differentially drive variation in total and at‐risk species richness can inform conservation action. Moreover, our approach can predict shifts in at‐risk species concentrations in response to projected environmental change and anthropogenic stressors.

中文翻译：

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是什么导致高风险物种丰富？环境因素比人为因素或生物学特性更具影响力

濒临灭绝的物种在空间中分布不均匀。在威胁过程很激烈，避难过程中或物种高度多样性的地区，受威胁物种可能会集中。但是，很少有人试图确定解释高危物种分布的过程。在这里，我们确定了生物学特征，环境因素和人为压力源在驱动北美哺乳动物和鸟类的总物种丰富度和高风险物种丰富度的空间格局方面的相对重要性。环境因素是总物种丰富度和风险物种丰富度的主要驱动因素。令人惊讶的是，总物种丰富度模型和有风险物种丰富度模型之间的变量关系方向大相径庭。了解环境梯度如何差异地驱动总物种和高风险物种丰富度的变化，可以为保护行动提供信息。此外，我们的方法可以预测高危物种浓度随预期的环境变化和人为压力而变化。