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Mapping tree density at a global scale

Overview of attention for article published in Nature, September 2015
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (99th percentile)
  • High Attention Score compared to outputs of the same age and source (99th percentile)

Readers on

mendeley
583 Mendeley
citeulike
7 CiteULike
Title
Mapping tree density at a global scale
Published in
Nature, September 2015
DOI 10.1038/nature14967
Pubmed ID
Authors

T. W. Crowther, H. B. Glick, K. R. Covey, C. Bettigole, D. S. Maynard, S. M. Thomas, J. R. Smith, G. Hintler, M. C. Duguid, G. Amatulli, M.-N. Tuanmu, W. Jetz, C. Salas, C. Stam, D. Piotto, R. Tavani, S. Green, G. Bruce, S. J. Williams, S. K. Wiser, M. O. Huber, G. M. Hengeveld, G.-J. Nabuurs, E. Tikhonova, P. Borchardt, C.-F. Li, L. W. Powrie, M. Fischer, A. Hemp, J. Homeier, P. Cho, A. C. Vibrans, P. M. Umunay, S. L. Piao, C. W. Rowe, M. S. Ashton, P. R. Crane, M. A. Bradford, Crowther, T W, Glick, H B, Covey, K R, Bettigole, C, Maynard, D S, Thomas, S M, Smith, J R, Hintler, G, Duguid, M C, Amatulli, G, Tuanmu, M-N, Jetz, W, Salas, C, Stam, C, Piotto, D, Tavani, R, Green, S, Bruce, G, Williams, S J, Wiser, S K, Huber, M O, Hengeveld, G M, Nabuurs, G-J, Tikhonova, E, Borchardt, P, Li, C-F, Powrie, L W, Fischer, M, Hemp, A, Homeier, J, Cho, P, Vibrans, A C, Umunay, P M, Piao, S L, Rowe, C W, Ashton, M S, Crane, P R, Bradford, M A

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.

Twitter Demographics

The data shown below were collected from the profiles of 1,003 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 583 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 24 4%
Brazil 16 3%
Germany 6 1%
United Kingdom 6 1%
France 6 1%
Canada 4 <1%
Switzerland 4 <1%
Colombia 4 <1%
Italy 3 <1%
Other 27 5%
Unknown 483 83%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 162 28%
Researcher 150 26%
Student > Master 81 14%
Student > Bachelor 49 8%
Professor 31 5%
Other 110 19%
Readers by discipline Count As %
Agricultural and Biological Sciences 241 41%
Environmental Science 200 34%
Earth and Planetary Sciences 67 11%
Engineering 19 3%
Physics and Astronomy 12 2%
Other 44 8%

Attention Score in Context

This research output has an Altmetric Attention Score of 1704. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 24 June 2017.
All research outputs
#431
of 7,944,325 outputs
Outputs from Nature
#115
of 46,773 outputs
Outputs of similar age
#14
of 229,614 outputs
Outputs of similar age from Nature
#5
of 906 outputs
Altmetric has tracked 7,944,325 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 46,773 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 72.4. This one has done particularly well, scoring higher than 99% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 229,614 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 906 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 99% of its contemporaries.