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Section Symposium

Plant-Insect Ecosystems

From the Roots to the Shoots: Impacts of Human and Ecological Legacies on Forest Ecosystems

Beneath the bark: Unpacking tree susceptibility to bark beetles and woodborers under drought

Wednesday, November 12, 2025
2:15 PM - 2:35 PM Pacific
Location: Oregon Convention Center, D135, OCC
Oral Presentation
Anthropogenic change has increased drought events, a major inciting factor of bark beetle outbreaks in conifer forests. Few studies, however, have explicitly considered how tree susceptibility to bark beetle attack may vary by drought ‘type’ (e.g., variation in intensity, duration, onset). Not all droughts are the same. Here, we review recent and planned work in different wood borer-conifer systems spanning Sirex noctilio, Dendroctonus ponderosa, and Ips confusus, sharing mechanistic insights into drought effects on tree defense where known. Understanding how drought type might interact with species-specific bark beetle lifestyles (i.e., aggressive, secondary) may inform outbreak dynamics at the landscape scale.