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Severity outweighs pyrodiversity in shaping avian and bat species distributions following an oak woodland megafire
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Severity outweighs pyrodiversity in shaping avian and bat species distributions following an oak woodland megafire
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Severity outweighs pyrodiversity in shaping avian and bat species distributions following an oak woodland megafire
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Journal Article
Severity outweighs pyrodiversity in shaping avian and bat species distributions following an oak woodland megafire
2025
Overview
Anthropogenic pressures have altered fire regimes across the western United States. These altered fire regimes, and the megafires they often produce, threaten ecologically and economically critical ecosystems and biodiversity across this region. Oak woodland savannas may be particularly sensitive to altered fire regimes, but there remains a significant gap in our understanding of how different characteristics of wildfire impact these ecosystems and the wildlife species that reside within them. In this study, we used an occupancy modeling framework to investigate how fire severity and pyrodiversity, the diversity of severity patches, impact the distributions of bird and bat species assemblages following a major wildfire in northern California. We used acoustic monitors deployed across the Hopland Research and Extension Center following the 2018 Mendocino Complex Fire and compared how patterns of fire severity and pyrodiversity influence habitat preferences across a diverse community of woodland bird and bat species. We found that fire enhances habitat use and increases occupancy for several species and species groups across both taxonomic groups. Specifically, low‐to‐moderate severity fire increased occupancy for several species and species groups. Pyrodiversity had smaller, negligible effects on species distributions relative to fire severity. Fires that reproduce the natural heterogeneity of oak woodland landscapes are likely key to sustaining high biodiversity across oak woodland ecosystems.
