Jianguo (Jingle) Wu is Professor of Ecology, Evolution, and Environmental Science at Arizona State University. His research interests include landscape ecology, urban ecology, and sustainability science, focusing on hierarchical patch dynamics, pattern-process-scale relationships, spatial scaling, land use change and its effects on ecosystem processes, and biodiversity and ecosystem functioning. He has published more than 120 scientific papers which involved mostly dryland ecosystems in North America and China. His professional service includes Program Chair of the 2001 Annual Symposium of the US Association for Landscape Ecology (US-IALE), Councillor-at-Large of US-IALE (2001–2003), Chair of Asian Ecology Section of Ecological Society of America (1999–2000), and Task Leader of GCTE of International Geosphere-Biosphere Programme (1997–2002). He is currently the Editor-in-Chief of the international journal Landscape Ecology. Richard J. Hobbs is Professor of Environmental Science at Murdoch University, Western Australia, and has research interests in restoration ecology and landscape ecology, focusing on the conservation and management of altered landscapes, particularly the agricultural area of southwestern Australia. He is a Fellow of the Australian Academy of Science and has been listed by ISI as one of the most highly cited researchers in Ecology and Environmental Science. His professional services include President of the International Association for Landscape Ecology 1999–2003 and President of the Ecological Society of Australia 1998–1999. He is currently the Editor-in-Chief of the journal Restoration Ecology.