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, 18/I-NB) projects funded by ESA; the Austrian Federal Ministry of Science and Research (BMWF-4.409/30-II/4/2009); the Austrian Academy of Sciences (ÖAW2007-11); the Research Project AGL2009-08562, Ministry of Science's Research and Development, Spain; the Project LIFE+ "ForBioSensing PL Comprehensive monitoring of stand dynamics in Bia?owie?a Forest supported with remote sensing techniques" cofounded by Life+ UE program (contract number LIFE13 ENV/PL/000048) and The National Fund for Environmental Protection and Water Management in Poland, This study has been partly supported by the IFBN (4000114425/15/NL/FF/gp) and CCI Biomass

, European Research Council Advanced Grant T-FORCES (291585); the Russian State Assignment of the CEPF RAS no. ????-?18-118052400130-7. The Russian Science Foundation supported data processing of the plot data from Russia (project no. 19-77-30015). We would like to thank Shell Gabon and the Smithsonian Conservation Biology, Processes 481097, 2003.

, International Institute for Applied Systems Analysis, Laxenburg, A-2361, Austria. 2 Forestry faculty, Ecosystems Services and Management Program

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