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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
692 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 1,001 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 692 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 27 4%
Brazil 21 3%
Germany 8 1%
United Kingdom 6 <1%
France 6 <1%
India 4 <1%
Switzerland 4 <1%
Colombia 4 <1%
Italy 3 <1%
Other 33 5%
Unknown 576 83%

Demographic breakdown

Readers by professional status Count As %
Researcher 182 26%
Student > Ph. D. Student 177 26%
Student > Master 95 14%
Student > Bachelor 56 8%
Professor 42 6%
Other 140 20%
Readers by discipline Count As %
Agricultural and Biological Sciences 272 39%
Environmental Science 222 32%
Earth and Planetary Sciences 67 10%
Unspecified 46 7%
Engineering 24 3%
Other 61 9%

Attention Score in Context

This research output has an Altmetric Attention Score of 1748. 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 20 November 2017.
All research outputs
#511
of 8,658,275 outputs
Outputs from Nature
#120
of 48,840 outputs
Outputs of similar age
#13
of 232,365 outputs
Outputs of similar age from Nature
#4
of 908 outputs
Altmetric has tracked 8,658,275 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 48,840 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 76.1. 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 232,365 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 908 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.