The fungal pathogen, Batrachochytrium dendrobatidis (Bd), has devastated biodiversity and ecosystem health and is implicated as a driver of mass amphibian extinctions. This 100-year study investigates which environmental factors contribute to Bd prevalence in a fully terrestrial species, and determines whether infection patterns differ between a fully terrestrial amphibian and more aquatic host species. We performed a historical survey to quantify Bd prevalence in 1127 Batrachoseps gregarius museum specimens collected from 1920 to 2000, and recent data from 16 contemporary (live-caught) B. gregarius populations from the southwestern slopes of the Sierra Nevada mountains in California, USA. We compared these results to Bd detection rates in 1395 historical and 1033 contemporary specimens from 10 species of anurans and 427 historical Taricha salamander specimens collected throughout the Sierra Nevada mountains. Our results indicate that Bd dynamics in the entirely terrestrial species, B. gregarius, differ from aquatic species in the same region in terms of both seasonal patterns of Bd abundance and in the possible timing of Bd epizootics.

真菌病原体Batrachochytrium dendrobatidis ( Bd ) 已经破坏了生物多样性和生态系统健康，并被认为是导致两栖动物大规模灭绝的驱动因素。这项为期 100 年的研究调查了哪些环境因素会导致完全陆生物种中Bd 的流行，并确定完全陆生两栖动物和更多水生宿主物种之间的感染模式是否不同。我们进行了一项历史调查，以量化从 1920 年到 2000 年收集的1127 个Batrachoseps gregarius博物馆标本的Bd流行率，以及来自 16 个当代（现场捕获的）B. gregarius 的最新数据来自美国加利福尼亚州内华达山脉西南坡的种群。我们将这些结果与在内华达山脉中收集的来自 10 种无尾目动物的 1395 个历史和 1033 个当代标本和 427 个历史悠久的Taricha蝾螈标本的Bd检测率进行了比较。我们的结果表明，在Bd丰度的季节性模式和Bd流行的可能时间方面，完全陆生物种B. gregarius 的Bd动态与同一地区的水生物种不同。