TY CONF TI PROSPECTS FOR USING PHENOLOGICAL BIOINDICATION OF TREES IN THE CLIMATE AGENDA KW phenology KW adaptation KW climate change KW bioindication KW silver birch KW correlation JO All-Russian Youth Conference dedicated to International Earth Day 2026 AU Serebryakov, O.V. AU Kortunova, E.R. PY 2026 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov