Kuno Kasak, University of Tartu, Department of Geography, Tartu, Estonia; University of California Berkeley, Department of Environmental Science, Policy, and Management, Berkeley, United States, Reti Ranniku, University of Tartu, Institute of Ecology & Earth Sciences, Department of Geography, Tartu, Estonia; University of Arkansas, Department of Biological and Agricultural Engineering, Fayetteville, AR, United States, Martin Beland, Laval University, Quebec City, QC, Canada, Joe Verfaillie, University of California Berkeley, Berkeley, CA, United States and Dennis D Baldocchi, University of California Berkeley, Department of Environmental Science, Policy, and Management, Berkeley, CA, United States