TY JOUR TI EATURES OF RESPIRATION AND PHOTOSYNTHESIS IN LEAVES OF DIFFERENT-AGED TREES OF POPLAR, SILVER BIRCH, AND SCOTS PINE KW respiration KW photosynthesis KW stomatal conductance KW species and genotypic characteristics KW poplar KW silver birch KW Scots pine KW habitat ecology JO Bulletin of KSAU AU Evlakov, P.M. AU Amelin, A.V. AU Zhuzhukin, K.V. AU Ryzhkova, V.S. AU Evtushenko, N.A. PY 2026 IS 0 PB Krasnoyarsk State Agrarian University