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Growth rate as a link between microbial diversity and soil biogeochemistry

Journal Article · · Nature Ecology and Evolution
 [1];  [2];  [3];  [4];  [1];  [4];  [1];  [1];  [2];  [5];  [1];  [1];  [1];  [1];  [6];  [7];  [8];  [1];  [9];  [3] more »;  [1] « less
  1. Northern Arizona Univ., Flagstaff, AZ (United States)
  2. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  3. Univ. of Colorado, Boulder, CO (United States)
  4. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  5. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  6. West Virginia Univ., Morgantown, WV (United States)
  7. Northern Arizona Univ., Flagstaff, AZ (United States); New Mexico Highlands University, Las Vegas, NM (United States)
  8. Northern Arizona Univ., Flagstaff, AZ (United States); Texas Tech Univ., Lubbock, TX (United States)
  9. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Univ. of California, Merced, CA (United States)

The growth rate of a microorganism is a simple yet profound way to quantify its impact on the world. The absolute growth rate of a microbial population reflects rates of resource assimilation, biomass production, and element transformation, some of the many ways that organisms affect Earth’s ecosystems and climate. Microbial fitness in the environment depends on the ability to reproduce quickly when conditions are favorable and adopt a survival physiology when conditions worsen, which cells coordinate by adjusting their relative growth rate. At the population level, relative growth rate is a sensitive metric of fitness, linking survival and reproduction to the ecology and evolution of populations. Techniques combining ‘omics and stable isotope probing enable sensitive measurements of growth rates of microbial assemblages and individual taxa in soil. Microbial ecologists can explore how the growth rates of taxa with known traits and evolutionary histories respond to changes in resource availability, environmental conditions, and interactions with other organisms. We anticipate that quantitative and scalable data on the growth rates of soil microorganisms, coupled with measurements of biogeochemical fluxes, will allow scientists to test and refine ecological theory and advance process-based models of carbon flux, nutrient uptake, and ecosystem productivity. Finally, measurements of in situ microbial growth rates provide insights into the ecology of populations and can be used to quantitatively link microbial diversity to soil biogeochemistry.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science (BSS)
Grant/Contract Number:
AC05-76RL01830; SC0020172; SC0023126; SC0016207; AC52-07NA27344
OSTI ID:
2511206
Alternate ID(s):
OSTI ID: 2539984
Report Number(s):
PNNL-SA--203861
Journal Information:
Nature Ecology and Evolution, Journal Name: Nature Ecology and Evolution Journal Issue: 11 Vol. 8; ISSN 2397-334X
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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