Professor, Institute of Dendrology, Polish Academy of Sciences, Kórnik (Poland), 2002 -, Member of the Polish Academy of Sciences since 2007. Director of the Institutin 2011-2019. Senior Fulbright Scholar, Laboratory of Tree-Ring Research, University of Arizona, Tucson (USA), 1988-1989. Visiting Scientist, School of Natural Resources, College of Agriculture and Life Sciences, University of Wisconsin, Madison, USA 1989-1991. Research Associate and a Graduate Faculty Member of Forestry, University of Minnesota, Collage of Biology and Environmental Protection, Silesian University, Katowice (Poland). Dr. hab. Forestry (1994) College of Forestry, Agricultural University, Poznań, Poland. MS in Forestry (1976) Department of General Ecology, Anatomy and Physiology of Plants, Forest-Technical University, St. Petersburg (Leningrad) Russia. Major in ecophysiology.