Research Database

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Intensifying Fire Season Aridity Portends Ongoing Expansion of Severe Wildfire in Western US Forests

Year: 2025

Area burned by wildfire has increased in western US forests and elsewhere over recent decades coincident with warmer and drier fire seasons. However, high–severity fire—fire that kills all or most trees—is arguably a more important metric of fire activity given its destabilizing influence on forest ecosystems and direct and indirect impacts to human communities. Here, we quantified area burned and area burned severely in western US forests from 1985 to 2022 and evaluated trends through time. We also assessed key relationships between area burned, extent and proportion burned severely…

Climate Change and Fire, Fire Effects and Fire Ecology, Fire History

fire severity, area burned, fire behavior

Publication Type: Journal Article

Finding floral and faunal species richness optima among active fire regimes

Year: 2025

Changing fire regimes have important implications for biodiversity and challenge traditional conservation approaches that rely on historical conditions as proxies for ecological integrity. This historical-centric approach becomes increasingly tenuous under climate change, necessitating direct tests of environmental impacts on biodiversity. At the same time, widespread departures from historical fire regimes have limited the ability to sample diverse fire histories. We examined 2 areas in California's Sierra Nevada (USA) with active fire regimes to study the responses of bird, plant, and bat…

Fire History, Fish and Wildlife Habitat

fire regimes, biodiversity, fire severity, wildlife

Publication Type: Journal Article

Showy dragonflies are being driven extinct by warming and wildfire

Year: 2025

Rising temperatures may disrupt reproduction before becoming lethal; thus mating traits could define species vulnerability to warming. Here, using >1,600 estimates of local extinction for 60 dragonfly species, we show that species with mating-associated wing ornamentation experienced more extinctions and lost more habitat under warming and following wildfire burn than non-ornamented species. By contrast, sensitivity was not affected by ecological traits, such as thermal limits, habitat specialization or body size.

Fire Effects and Fire Ecology, Fish and Wildlife Habitat

habitat, biodiversity

Publication Type: Journal Article