Abstract Mortality of mammals from vehicle collisions is common, but there remain questions regarding how species traits influence vehicle collision vulnerability. We analyzed a database of North American mammal cause-specific mortality to examine factors influencing vehicle mortality. Our dataset consisted of 421 studies that monitored 34,798 individuals across 66 species including 740 vehicle mortalities. Vehicle mortality increased 4-fold over the study period (1965–2017), from 3% to 12% of total mortality between the first and last decade. Omnivores were more likely to die from vehicle mortality than herbivores. Vehicle mortality was highest for species at intermediate body masses (6–12 kg). Sociality, foraging behavior, diel behavior, and scavenging behavior did not influence vehicle mortality. The habitat and dietary flexibility of omnivores may put them at increased risk of vehicle collisions. The increase in vehicle collisions over the past 50 years reiterates the need for mitigation measures to conserve North American mammal populations.

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研究报告：50 年来北美哺乳动物的车辆死亡率增加

摘要 哺乳动物因车辆碰撞而死亡很常见，但物种特征如何影响车辆碰撞脆弱性仍存在问题。我们分析了北美哺乳动物特定原因死亡率的数据库，以检查影响车辆死亡率的因素。我们的数据集由 421 项研究组成，这些研究监测了 66 个物种的 34,798 名个体，其中包括 740 名车辆死亡。在研究期间（1965-2017 年），车辆死亡率增加了 4 倍，从第一个和最后一个十年之间的总死亡率的 3% 增加到 12%。杂食动物比食草动物更容易死于车辆死亡。中等体重（6-12 公斤）的物种的车辆死亡率最高。社交、觅食行为、饮食行为和拾荒行为不影响车辆死亡率。杂食动物的栖息地和饮食灵活性可能会使它们面临更高的车辆碰撞风险。过去 50 年来车辆碰撞的增加重申了采取缓解措施保护北美哺乳动物种群的必要性。