
bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 9, 2024
Abstract Climate change is redefining the dynamics of forest ecosystems globally, particularly through its impact on pest populations such as spruce budworm (SBW, Choristoneura fumiferana [Clem.]), a major defoliator in North American boreal forests. This study investigates shifts population across range response to recent climate change. We used process-based, temperature-dependent ecophysiological model combined with ERA5 reanalysis assess changes SBW phenology, reproduction rate, winter survival and growth rates from 1950 2022 America. Our findings demonstrate pronounced northward expansion suitable conditions for SBW, accompanied by earlier phenological events increased northern regions. Conversely, southern parts are experiencing mortality due warmer temperatures. highlights significant elevated temperatures, during critical developmental windows spring summer, which pivotal reproduction. Additionally, our results reveal that observed more strongly driven than landscape composition structure. estimated have shifted over 68 km average, but this shift reached 200 easternmost portions range. Climate-induced underscores need adaptive management strategies consider rapid ecological potential vulnerability climatic biotic stressors. provides vital insights can inform ensuring sustainability face ongoing
Language: Английский