title: Spatially-explicit models of global tree density.
abstract: Remote sensing and geographic analysis of woody vegetation provide means of evaluating the distribution of natural resources, patterns of biodiversity and ecosystem structure, and socio-economic drivers of resource utilization. While these methods bring geographic datasets with global coverage into our day-to-day analytic spheres, many of the studies that rely on these strategies do not capitalize on the extensive collection of existing field data. We present the methods and maps associated with the first spatially-explicit models of global tree density, which relied on over 420,000 forest inventory field plots from around the world. This research is the result of a collaborative effort engaging over 20 scientists and institutions, and capitalizes on an array of analytical strategies. Our spatial data products offer precise estimates of the number of trees at global and biome scales, but should not be used for local-level estimation. At larger scales, these datasets can contribute valuable insight into resource management, ecological modelling efforts, and the quantification of ecosystem services.
authors.affiliation: Yale School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511, USA.
authors.forename: Henry B
authors.initials: HB
authors.lastname: Glick
authors.affiliation: Yale School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511, USA.
authors.forename: Charlie
authors.initials: C
authors.lastname: Bettigole
authors.affiliation: Yale School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511, USA.
authors.forename: Daniel S
authors.initials: DS
authors.lastname: Maynard
authors.affiliation: Yale School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511, USA.
authors.forename: Kristofer R
authors.initials: KR
authors.lastname: Covey
authors.affiliation: Center for Conservation Biology, Department of Biology, Stanford University, Stanford, CA 94305, USA.
authors.forename: Jeffrey R
authors.initials: JR
authors.lastname: Smith
authors.affiliation: Yale School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511, USA.|Netherlands Institute of Ecology, Wageningen 6700 AB, Netherlands.
authors.forename: Thomas W
authors.initials: TW
authors.lastname: Crowther
mesh_terms: D044822:Biodiversity; D017753:Ecosystem; D065928:Forests; D008962:Models, Theoretical; D014197:Trees