Willem F. de Boer,^* Lei Cao,^** Mark Barter,^*** Xin Wang,^**** Mengmeng Sun,^***** Herman van Oeveren,^****** Jan de Leeuw,^******* Jeb Barzen,^******** Herbert H. T. Prins<sup>*********


*</sup>Willem F. de Boer is a lecturer at the Resource Ecology Group, Wageningen University. He is responsible for lectures and research in the area of animal ecology, community composition and biodiversity. Address: Resource Ecology Group, Wageningen University, Droevendaalsesteeg 3a, 6708 PB Wageningen, The Netherlands, e-mail: fred.deboer@wur.nl
^**Lei Cao () is a Associate Professor teaching ornithology and zoology in the School of Life Sciences at the University of Science and Technology of China. Address: School of Life Sciences, University of Science and Technology of China, No. 96 Jinzhai Road, Anhui, Hefei 30027, People's Republic of China, e-mail: caolei@ustc.edu.cn
^***Mark Barter is a Visiting Professor in the School of Life Sciences at the University of Science and Technology of China. He is also an Associate Expert of Wetlands International. Address: 21 Chivalry Avenue, Glen Waverley VIC 3150, Australia. e-mail: markbarter@optusnet.com.au
^****Xin Wang is a PhD student at the University of Science and Technology of China. Address: School of Life Sciences, University of Science and Technology of China, No. 96 Jinzhai Road, Anhui, Hefei 30027, People's Republic of China. e-mail: wangxin2@mail.ustc.edu.cn
^*****Mengmeng Sun is an undergradute student at the University of Science and Technology of China. Address: School of Life Sciences, University of Science and Technology of China, No. 96 Jinzhai Road, Anhui, Hefei 30027, People's Republic of China. e-mail: smmnancy@mail.ustc.edu.cn
^******Herman van Oeveren is a research assistant with an interest in grass and grazers of African savanna at the Resource Ecology Group, Wageningen University. Address: Resource Ecology Group, Wageningen University, Droevendaalsesteeg 3a, 6708 PB Wageningen, The Netherlands, e-mail: herman.vanoeveren@wur.nl
^*******Jan de Leeuw contributed to this work as Associate Professor Environmental Science at the International Institute for Geoinformation Science and Earth Observation (ITC) in Enschede, The Netherlands. He recently moved to the International Livestock Research Institute (ILRI), Nairobi, Kenya. Address: International Institute for Geo-Information Science and Earth Observation, Hengelosestraat 9, P.O. Box 6, 7500 AA Enschede, The Netherlands, e-mail: j.leeuw@cgiar.org
^********Jeb Barzen directs the Field Ecology Department at the International Crane Foundation, USA. Address: International Crane Foundation, E-11376 Shady Lane Road, Baraboo, WI 53913, USA. e-mail: jeb@savingcranes.org
^*********Herbert H. T. Prins is a full Professor and chair holder of the Resource Ecology Group, Wageningen University. His research focuses on understanding herbivory in a spatial context. Address: Resource Ecology Group, Wageningen University, Droevendaalsesteeg 3a, 6708 PB Wageningen, The Netherlands, e-mail: herbert.prins@wur.nl