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Title: Estimating taxon-specific population dynamics in diverse microbial communities

Journal Article · · Ecosphere
DOI: https://doi.org/10.1002/ecs2.2090 · OSTI ID:1418693
 [1];  [2];  [3];  [1];  [4];  [1];  [3];  [1];  [3];  [5];  [4]; ORCiD logo [1]
  1. Northern Arizona Univ., Flagstaff, AZ (United States). Center for Ecosystem Science and Society and Dept. of Biological Sciences
  2. Northern Arizona Univ., Flagstaff, AZ (United States). Center for Ecosystem Science and Society; U.S. Geological Survey, Moab, UT (United States). Southwest Biological Science Center
  3. Northern Arizona Univ., Flagstaff, AZ (United States). Center for Ecosystem Science and Society
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences Directorate
  5. West Virginia Univ., Morgantown, WV (United States). Division of Plant and Soil Sciences

Understanding how population-level dynamics contribute to ecosystem-level processes is a primary focus of ecological research and has led to important breakthroughs in the ecology of macroscopic organisms. However, the inability to measure population-specific rates, such as growth, for microbial taxa within natural assemblages has limited ecologists’ understanding of how microbial populations interact to regulate ecosystem processes. In this work, we use isotope incorporation within DNA molecules to model taxon-specific population growth in the presence of 18O-labeled water. By applying this model to phylogenetic marker sequencing data collected from stable-isotope probing studies, we estimate rates of growth, mortality, and turnover for individual microbial populations within soil assemblages. When summed across the entire bacterial community, our taxon-specific estimates are within the range of other whole-assemblage measurements of bacterial turnover. Because it can be applied to environmental samples, the approach we present is broadly applicable to measuring population growth, mortality, and associated biogeochemical process rates of microbial taxa for a wide range of ecosystems and can help reveal how individual microbial populations drive biogeochemical fluxes.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division; National Science Foundation (NSF); Technology Research Initiative Fund (TRIF)
Grant/Contract Number:
AC52-07NA27344; DEB‐1241094; DEB‐1146449; SC0016207; SCW1024; SCW1590
OSTI ID:
1418693
Alternate ID(s):
OSTI ID: 1418696; OSTI ID: 1474397
Report Number(s):
LLNL-JRNL-731619; LLNL-JRNL-738626; 891927
Journal Information:
Ecosphere, Vol. 9, Issue 1; ISSN 2150-8925
Publisher:
Ecological Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 55 works
Citation information provided by
Web of Science

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Microbial ecology of the cryosphere (glacial and permafrost habitats): current knowledge journal February 2019
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Figures / Tables (4)