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Title: Conversion of Amazon rainforest to agriculture alters community traits of methane-cycling organisms

Journal Article · · Molecular Ecology
DOI:https://doi.org/10.1111/mec.14011· OSTI ID:1379749
ORCiD logo [1];  [1];  [2];  [3];  [4];  [5];  [6];  [1]
  1. Univ. of Oregon, Eugene, OR (United States)
  2. Univ. of California, Davis, CA (United States)
  3. Univ. of Massachusetts, Amherst, MA (United States)
  4. USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
  5. Utah State Univ., Logan, UT (United States)
  6. Michigan State Univ., East Lansing, MI (United States)

Abstract Land use change is one of the greatest environmental impacts worldwide, especially to tropical forests. The Amazon rainforest has been subject to particularly high rates of land use change, primarily to cattle pasture. A commonly observed response to cattle pasture establishment in the Amazon is the conversion of soil from a methane sink in rainforest, to a methane source in pasture. However, it is not known how the microorganisms that mediate methane flux are altered by land use change. Here, we use the deepest metagenomic sequencing of Amazonian soil to date to investigate differences in methane‐cycling microorganisms and their traits across rainforest and cattle pasture soils. We found that methane‐cycling microorganisms responded to land use change, with the strongest responses exhibited by methane‐consuming, rather than methane‐producing, microorganisms. These responses included a reduction in the relative abundance of methanotrophs and a significant decrease in the abundance of genes encoding particulate methane monooxygenase. We also observed compositional changes to methanotroph and methanogen communities as well as changes to methanotroph life history strategies. Our observations suggest that methane‐cycling microorganisms are vulnerable to land use change, and this vulnerability may underlie the response of methane flux to land use change in Amazon soils.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231; DE‐AC02‐05CH11231
OSTI ID:
1379749
Alternate ID(s):
OSTI ID: 1401889
Journal Information:
Molecular Ecology, Vol. 26, Issue 6; ISSN 0962-1083
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 43 works
Citation information provided by
Web of Science

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Cited By (5)

Deforestation impacts network co-occurrence patterns of microbial communities in Amazon soils journal November 2018
Facultative methanotrophs are abundant at terrestrial natural gas seeps journal June 2018
Novel facultative Methylocella strains are active methane consumers at terrestrial natural gas seeps journal October 2019
New Biological Insights Into How Deforestation in Amazonia Affects Soil Microbial Communities Using Metagenomics and Metagenome-Assembled Genomes journal July 2018
Use of RNA and DNA to Identify Mechanisms of Bacterial Community Homogenization journal September 2019

Figures / Tables (4)