Selected factors influencing autumn phenology of chosen forest tree species

Changes in autumn phenology are less studied than changes in spring phenology and therefore poorly understood. They are influenced by huge amount of factors which can be hardly explained. We focused particularly on air temperature, amounts of rainfall and water balance. We examined spatial patterns (across sites) and temporal patterns (across years). Between years 2009 and 2010 we had monitored autumn vegetative phenological phases on three sites which are located in the south part of Kremnicke vrchy mountains and in Zvolenska kotlina basin (Arboretum, Bukovina, Boky). We have monitored coloring of leaves and leaves falling on Corylus avellana L. and Carpinus betulus L.