Mapping tree density at a global scale

Nature
T W CrowtherM A Bradford

Abstract

The global extent and distribution of forest trees is central to our understanding of the terrestrial biosphere. We provide the first spatially continuous map of forest tree density at a global scale. This map reveals that the global number of trees is approximately 3.04 trillion, an order of magnitude higher than the previous estimate. Of these trees, approximately 1.39 trillion exist in tropical and subtropical forests, with 0.74 trillion in boreal regions and 0.61 trillion in temperate regions. Biome-level trends in tree density demonstrate the importance of climate and topography in controlling local tree densities at finer scales, as well as the overwhelming effect of humans across most of the world. Based on our projected tree densities, we estimate that over 15 billion trees are cut down each year, and the global number of trees has fallen by approximately 46% since the start of human civilization.

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Citations

Dec 18, 2015·Nature·T W CrowtherM A Bradford
Sep 24, 2015·Global Change Biology·Stephen M ThomasS J Ormerod
Dec 19, 2015·Nature Communications·Rebecca Chaplin-KramerHenry King
Apr 28, 2016·Trends in Ecology & Evolution·David B Lindenmayer, William F Laurance
Jul 8, 2016·Biological Reviews of the Cambridge Philosophical Society·David B Lindenmayer, William F Laurance
Jul 16, 2016·Environmental Science & Technology·Xun WangXinbin Feng
Aug 17, 2016·Scientific Data·Henry B GlickThomas W Crowther
Jan 18, 2017·Proceedings of the National Academy of Sciences of the United States of America·Eshchar MizrachiAlexander A Myburg
Jan 21, 2017·Nature Communications·David Moreno-MateosJosé M Rey Benayas
Jun 3, 2017·Journal of Experimental Botany·Samantha S StutzDavid T Hanson
Mar 1, 2018·The New Phytologist·Henrik HartmannMichael O'Brien
Oct 24, 2017·Science Advances·Anna TovoAmos Maritan
Jan 5, 2018·Ecology and Evolution·Rajendra M PandaChandrashekhar Biradar
Jun 15, 2018·Global Change Biology·Zhenhong HuChonggang Xu
Jul 27, 2018·Global Change Biology·John T AbatzoglouCrystal A Kolden
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Apr 30, 2020·Ecological Applications : a Publication of the Ecological Society of America·António FerrazDavid B Clark
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Aug 15, 2020·Advanced Materials·Upamanyu RayTeng Li
Sep 22, 2019·Nature·Aisling Irwin
Nov 20, 2016·FEMS Microbiology Reviews·Petr Baldrian
Dec 3, 2016·Nature·T W CrowtherM A Bradford

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