Bats and Owls Inventory at Devil's Postpile National Monument - Open Format Dataset

For its size, Devils Postpile National Monument supports a diverse assemblage of nocturnal fauna. Our summer 2022 surveys recorded 15 bat species within the monument. Five of these species had not been previously confirmed in the monument, including two of the three sensitive species targeted: pallid bat (Antrozous pallidus) and fringed myotis (Myotis thysanodes). No California Spotted Owls (Strix occidentalis occidentalis) were confirmed, but a Great Horned Owl (Bubo virginianus) was recorded. Across the disturbance categories of interest identified by monument leadership (e.g., high, moderate, and low levels of fire and blowdown disturbance), there was little variability in bat species richness, total activity, or individual species occurrence. Sites with moderate levels of disturbance recorded the most species and highest levels of activity compared to high and low disturbance, and both priority species were recorded within all three disturbance categories.

就面积规模而言，魔鬼柱国家纪念区（Devils Postpile National Monument）孕育了种类丰富的夜行性动物类群。我们于2022年夏季开展的野外调查中，在该纪念区内记录到15种蝙蝠。其中5种为该纪念区此前未确认的新记录物种，包括本次选定的3种敏感保护物种中的2种：苍白蝙蝠（Antrozous pallidus）与缨鼠耳蝠（Myotis thysanodes）。本次调查未确认存在加州斑点猫头鹰（Strix occidentalis occidentalis），但记录到1只大雕鸮（Bubo virginianus）。针对纪念区管理方划定的各类关注干扰等级（例如火灾与风倒干扰的高、中、低水平），蝙蝠物种丰富度、总活动强度以及单物种出现频次均未表现出显著差异。与高、低干扰等级的样地相比，中等干扰等级的样地记录到的蝙蝠物种数量最多、活动强度最高，且两类优先保护物种均在三类干扰等级的样地中被记录到。