title: Ecosystems in four dimensions.
authors: Department of Ecosystem Science and Sustainability, Colorado State University, Fort Collins, CO, 80523, USA.|Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden.
authors: Dan
authors: D
authors: Binkley
mesh_terms: D018534:Earth, Planet; D017753:Ecosystem
keywords: Earth's critical zone; Tansley's ecosystem concept; areal extent of ecosystems; boundaries; changes in ecosystems with time; depth of an ecosystem; ecological stairstep; ecology