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Title: Spatial scale drives patterns in soil bacterial diversity: Spatial scale drives soil diversity

Journal Article · · Environmental Microbiology
 [1];  [2];  [3];  [4];  [1];  [1];  [5];  [3];  [1]
  1. Biosciences Division, Argonne National Laboratory, 9700 S. Cass Ave. Argonne IL 60439 USA
  2. Biosciences Division, Argonne National Laboratory, 9700 S. Cass Ave. Argonne IL 60439 USA; Graduate Program in Biophysical Sciences, University of Chicago, 929 E. 57th St. Chicago IL 60637 USA
  3. Biosciences Division, Argonne National Laboratory, 9700 S. Cass Ave. Argonne IL 60439 USA; Computation Institute, University of Chicago, Chicago IL 60637 USA
  4. Biosciences Division, Argonne National Laboratory, 9700 S. Cass Ave. Argonne IL 60439 USA; Department of Ecology and Evolution, Department of Surgery, University of Chicago, 1101 E. 57th St. Chicago IL 606037 USA
  5. Biosciences Division, Argonne National Laboratory, 9700 S. Cass Ave. Argonne IL 60439 USA; Department of Ecology and Evolution, Department of Surgery, University of Chicago, 1101 E. 57th St. Chicago IL 606037 USA; Marine Biological Laboratory, 7 MBL Street Woods Hole MA 02543 USA; College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058 China

Soil microbial communities are essential for ecosystem function, but linking community composition to biogeochemical processes is challenging because of high microbial diversity and large spatial variability of most soil characteristics. We investigated soil bacterial community structure in a switchgrass stand planted on soil with a history of grassland vegetation at high spatial resolution to determine whether biogeographic trends occurred at the centimeter scale. Moreover, we tested whether such heterogeneity, if present, influenced community structure within or among ecosystems. Pronounced heterogeneity was observed at centimeter scales, with abrupt changes in relative abundance of phyla from sample to sample. At the ecosystem scale (> 10 m), however, bacterial community composition and structure were subtly, but significantly, altered by fertilization, with higher alpha diversity in fertilized plots. Moreover, by comparing these data with data from 1772 soils from the Earth Microbiome Project, it was found that 20% diverse globally sourced soil samples, while grassland soils shared approximately 40% of their operational taxonomic units with the current study. By spanning several orders of magnitude, the analysis suggested that extreme patchiness characterized community structure at smaller scales but that coherent patterns emerged at larger length scales.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science - Office of Biological and Environmental Research
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1392474
Journal Information:
Environmental Microbiology, Vol. 18, Issue 6; ISSN 1462-2912
Publisher:
Wiley
Country of Publication:
United States
Language:
English

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