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Large emissions from floodplain trees close the Amazon methane budget

Overview of attention for article published in Nature, December 2017
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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)
  • Good Attention Score compared to outputs of the same age and source (75th percentile)

Mentioned by

news
11 news outlets
blogs
5 blogs
twitter
195 tweeters
facebook
2 Facebook pages
googleplus
1 Google+ user
reddit
1 Redditor

Citations

dimensions_citation
29 Dimensions

Readers on

mendeley
232 Mendeley
Title
Large emissions from floodplain trees close the Amazon methane budget
Published in
Nature, December 2017
DOI 10.1038/nature24639
Pubmed ID
Authors

Sunitha R. Pangala, Alex Enrich-Prast, Luana S. Basso, Roberta Bittencourt Peixoto, David Bastviken, Edward R. C. Hornibrook, Luciana V. Gatti, Humberto Marotta, Luana Silva Braucks Calazans, Cassia Mônica Sakuragui, Wanderley Rodrigues Bastos, Olaf Malm, Emanuel Gloor, John Bharat Miller, Vincent Gauci

Abstract

Wetlands are the largest global source of atmospheric methane (CH4), a potent greenhouse gas. However, methane emission inventories from the Amazon floodplain, the largest natural geographic source of CH4 in the tropics, consistently underestimate the atmospheric burden of CH4 determined via remote sensing and inversion modelling, pointing to a major gap in our understanding of the contribution of these ecosystems to CH4 emissions. Here we report CH4 fluxes from the stems of 2,357 individual Amazonian floodplain trees from 13 locations across the central Amazon basin. We find that escape of soil gas through wetland trees is the dominant source of regional CH4 emissions. Methane fluxes from Amazon tree stems were up to 200 times larger than emissions reported for temperate wet forests and tropical peat swamp forests, representing the largest non-ebullitive wetland fluxes observed. Emissions from trees had an average stable carbon isotope value (δ13C) of -66.2 ± 6.4 per mil, consistent with a soil biogenic origin. We estimate that floodplain trees emit 15.1 ± 1.8 to 21.2 ± 2.5 teragrams of CH4 a year, in addition to the 20.5 ± 5.3 teragrams a year emitted regionally from other sources. Furthermore, we provide a 'top-down' regional estimate of CH4 emissions of 42.7 ± 5.6 teragrams of CH4 a year for the Amazon basin, based on regular vertical lower-troposphere CH4 profiles covering the period 2010-2013. We find close agreement between our 'top-down' and combined 'bottom-up' estimates, indicating that large CH4 emissions from trees adapted to permanent or seasonal inundation can account for the emission source that is required to close the Amazon CH4 budget. Our findings demonstrate the importance of tree stem surfaces in mediating approximately half of all wetland CH4 emissions in the Amazon floodplain, a region that represents up to one-third of the global wetland CH4 source when trees are combined with other emission sources.

Twitter Demographics

The data shown below were collected from the profiles of 195 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 232 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 232 100%

Demographic breakdown

Readers by professional status Count As %
Researcher 67 29%
Student > Ph. D. Student 49 21%
Student > Master 35 15%
Unspecified 27 12%
Student > Doctoral Student 13 6%
Other 41 18%
Readers by discipline Count As %
Environmental Science 87 38%
Unspecified 50 22%
Agricultural and Biological Sciences 42 18%
Earth and Planetary Sciences 36 16%
Engineering 5 2%
Other 12 5%

Attention Score in Context

This research output has an Altmetric Attention Score of 227. 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 29 August 2019.
All research outputs
#57,361
of 13,621,476 outputs
Outputs from Nature
#6,123
of 70,216 outputs
Outputs of similar age
#3,075
of 392,706 outputs
Outputs of similar age from Nature
#182
of 756 outputs
Altmetric has tracked 13,621,476 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 70,216 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 77.0. This one has done particularly well, scoring higher than 91% 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 392,706 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 756 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 75% of its contemporaries.