Nancy B. Grimm (School of Life Sciences, Arizona State University, Tempe, AZ), Stanley H. Faeth (School of Life Sciences, Arizona State University, Tempe, AZ), Nancy E. Golubiewski (New Zealand Centre for Ecological Economics, Private Bag 11 052, Palmerston North, New Zealand), Charles L. Redman (School of Life Sciences, Arizona State University, Tempe, AZ), Jianguo Wu (School of Life Sciences, Arizona State University, Tempe, AZ), Xuemei Bai (CSIRO Sustainable Ecosystems, Canberra ACT 2601, Australia) and John M. Briggs (School of Life Sciences, Arizona State University, Tempe, AZ)