2026-05-05T11:27:57Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/687062024-07-11T19:00:26Zcom_10324_1137com_10324_931com_10324_894col_10324_1222

00925njm 22002777a 4500 dc Barchenkov, Alexey author Rubtsov, Alexey author Safronova, Inna author Astapenko, Sergey author Tabakova, Kseniia author Bogdanova, Kristina author Anuev, Eugene author Arzac Peña, Alberto José author 2023 Forest decline is a significant issue affecting critical ecosystem processes worldwide. Here, we describe mortality in Pinus sylvestris L. monitored trees caused by the inhabitation of pine bark beetles (Tomicus minor Hart.) in symbiosis with ophiostomatoid fungi (Ophiostoma piceae (Munch) H. et P. Sydow) infection in the forest-steppe of central Siberia. Stem sap flow (Q) and stem diameter fluctuations (dRc) were monitored in eight pine trees during seven consecutive growing seasons (2015–2021). In addition, microcore sampling every ten days allowed the determination of stem wood formation in monitored trees in the 2021 growing season. During 2020 and 2021, two cases of Q termination were recorded among the monitored trees, with microcores revealing no cambium formation. Thus, the seasonal Q onset matches the beginning of the beetle dispersal period when they attack and inhabit tree stems. The decline of circumferential stem size began 10–12 days after Q onset, during the massive inhabitation of beetles into the stems. The disturbance of Q in trees occurred in 21–23 days, and total cessation of Q was observed 23–26 days after the Q onset at the beetle’s egg development phase. The timing of dRc disturbance and Q cessation observed directly coincides with the beetle life cycle. Thus, the phenology of pine trees and T. minor beetles is driven by seasonal weather conditions, particularly the cumulative air temperature (>0 °C). Forests, 2023, Vol. 14, Nº. 7, 1301 1999-4907 https://uvadoc.uva.es/handle/10324/68706 10.3390/f14071301 1301 7 Forests 14 1999-4907 Pinus sylvestris Pino silvestre Sap flow Forests and forestry Bosques y silvicultura Agricultural innovations Innovaciones agrícolas Tree growth Árboles - Crecimiento Wood - Anatomy Madera - Anatomía Fungi Hongos patógenos Bark beetles Escarabajos Trees - Diseases and pests Árboles - Enfermedades y plagas Forests and forestry - Russia (Federation) - Siberia Features of scots pine mortality due to incursion of pine bark beetles in symbiosis with ophiostomatoid fungi in the forest-steppe of central Siberia