Nutrients cause consolidation of soil carbon flux to small proportion of bacterial community

Stone, Bram W.; Li, Junhui; Koch, Benjamin J.; Blazewicz, Steven J.; Dijkstra, Paul; Hayer, Michaela; Hofmockel, Kirsten S.; Liu, Xiao-Jun Allen; Mau, Rebecca L.; Morrissey, Ember M.; Pett-Ridge, Jennifer; Schwartz, Egbert; Hungate, Bruce A.

doi:10.1038/s41467-021-23676-x

Title: Nutrients cause consolidation of soil carbon flux to small proportion of bacterial community

Journal Article · Mon Jun 07 00:00:00 EDT 2021 · Nature Communications

DOI:https://doi.org/10.1038/s41467-021-23676-x· OSTI ID:1810091

^[1];

^[2]; Koch, Benjamin J. ^[2];

^[3]; Dijkstra, Paul ^[2]; Hayer, Michaela ^[2];

^[4];

^[5]; Mau, Rebecca L. ^[2];

^[6];

^[7]; Schwartz, Egbert ^[2];

^[2]

Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Northern Arizona Univ., Flagstaff, AZ (United States)
Northern Arizona Univ., Flagstaff, AZ (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Iowa State Univ., Ames, IA (United States)
Univ. of Oklahoma, Norman, OK (United States)
West Virginia Univ., Morgantown, WV (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Merced, CA (United States)

AbstractNutrient amendment diminished bacterial functional diversity, consolidating carbon flow through fewer bacterial taxa. Here, we show strong differences in the bacterial taxa responsible for respiration from four ecosystems, indicating the potential for taxon-specific control over soil carbon cycling. Trends in functional diversity, defined as the richness of bacteria contributing to carbon flux and their equitability of carbon use, paralleled trends in taxonomic diversity although functional diversity was lower overall. Among genera common to all ecosystems, Bradyrhizobium, the Acidobacteria genus RB41, and Streptomyces together composed 45–57% of carbon flow through bacterial productivity and respiration. Bacteria that utilized the most carbon amendment (glucose) were also those that utilized the most native soil carbon, suggesting that the behavior of key soil taxa may influence carbon balance. Mapping carbon flow through different microbial taxa as demonstrated here is crucial in developing taxon-sensitive soil carbon models that may reduce the uncertainty in climate change projections.

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Research Organization:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC05-76RL01830; AC52-07NA27344

OSTI ID:: 1810091

Alternate ID(s):: OSTI ID: 1813700

Report Number(s):: PNNL-SA-164452; LLNL-JRNL-814028

Journal Information:: Nature Communications, Vol. 12, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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