Transdisciplinary research in support of land and water management in China and Southeast Asia : evaluation of four research projects - Siew, Tuck Fatt (Goethe University. Institute of Physical Geography) ; Aenis, Thomas (Humboldt-Universität zu Berlin) ; Spangenberg, Joachim H. (UFZ-Helmholtz Centre for Environmental Research. Department of Community Ecology) ; Nauditt, Alexandra (Cologne University of Applied Sciences. Institute for Technology and Resources Management in the Tropics and Subtropics) ; Frank, Sina K. (University of Cambridge. Department of Geography) ; Ribbe, Lars (Cologne University of Applied. Institute for Technology and Resources Management in the Tropics and Subtropics) ; Rodríguez-Labajos, Beatriz (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals) ; Rumbaur, Christian (Technical University Munich. Chair of Hydrology and River Basin Management) ; Settele, Josef (German Centre for Integrative Biodiversity Research (Halle-Jena-Leipzig, Alemanya)) ; Wang, Jue (Humboldt-Universität zu Berlin) ; Sustainable Europe Research Institute Germany