1 School of Environmental and Forest Sciences, University of Washington, Anderson Hall, Box 352100, Seattle, WA 98115, USA.
2 Research group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk BE-2610, Belgium.
3 Global Change Research Institute of the Czech Academy of Sciences, Bělidla 986/4a, Brno 60 300, Czech Republic.
4 IFER - Institute of Forest Ecosystem Research, Čs. armády 655, 254 01 Jílové u Prahy, Czech Republic.
5 Department of Ecosystem Biology, Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 1645/31a, 370 05 České Budějovice, Czech Republic.
7 School of Forest, Fisheries, and Geomatics Sciences, 134 Newins-Ziegler Hall, University of Florida, Gainesville, Florida, 32611-0410, USA.
8 Chair of Ecophysiology of Plants, Life Science Center Weihenstephan, Technische Universitä München, Hans-Carl-von-Carlowitz-Platz 2, 85354 Freising, Germany.
9 Mendel University in Brno, Zemedelska 3, Brno 613 00, Czech Republic.