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Title: Greatest soil microbial diversity found in micro-habitats

Abstract

Microbial interactions occur in habitats much smaller than typically considered in classic ecological studies. This study uses soil aggregates to examine soil microbial community composition and structure of both bacteria and fungi at a microbially relevant scale. Aggregates were isolated from three land management systems in central Iowa, USA to test if aggregate-level microbial responses were sensitive to large-scale shifts in plant community and management practices. Bacteria and fungi exhibited similar patterns of community structure and diversity among soil aggregates, regardless of land management. Microaggregates supported more diverse microbial communities, both taxonomically and functionally. Calculation of a weighted proportional whole soil diversity, which accounted for microbes found in aggregate fractions, resulted in 65% greater bacterial richness and 100% greater fungal richness over independently sampled whole soil. Our results show microaggregates support a previously unrecognized diverse microbial community that likely effects microbial access and metabolism of soil substrates.

Authors:
ORCiD logo; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1455253
Report Number(s):
PNNL-SA-123740
Journal ID: ISSN 0038-0717; 453060036
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Soil Biology and Biochemistry
Additional Journal Information:
Journal Volume: 118; Journal Issue: C; Journal ID: ISSN 0038-0717
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
bacteria; fungi; Soil Aggregates; micro-habitat; agroecosystem; bioenergy; community

Citation Formats

Bach, Elizabeth M., Williams, Ryan J., Hargreaves, Sarah K., Yang, Fan, and Hofmockel, Kirsten S. Greatest soil microbial diversity found in micro-habitats. United States: N. p., 2018. Web. doi:10.1016/j.soilbio.2017.12.018.
Bach, Elizabeth M., Williams, Ryan J., Hargreaves, Sarah K., Yang, Fan, & Hofmockel, Kirsten S. Greatest soil microbial diversity found in micro-habitats. United States. doi:10.1016/j.soilbio.2017.12.018.
Bach, Elizabeth M., Williams, Ryan J., Hargreaves, Sarah K., Yang, Fan, and Hofmockel, Kirsten S. Thu . "Greatest soil microbial diversity found in micro-habitats". United States. doi:10.1016/j.soilbio.2017.12.018.
@article{osti_1455253,
title = {Greatest soil microbial diversity found in micro-habitats},
author = {Bach, Elizabeth M. and Williams, Ryan J. and Hargreaves, Sarah K. and Yang, Fan and Hofmockel, Kirsten S.},
abstractNote = {Microbial interactions occur in habitats much smaller than typically considered in classic ecological studies. This study uses soil aggregates to examine soil microbial community composition and structure of both bacteria and fungi at a microbially relevant scale. Aggregates were isolated from three land management systems in central Iowa, USA to test if aggregate-level microbial responses were sensitive to large-scale shifts in plant community and management practices. Bacteria and fungi exhibited similar patterns of community structure and diversity among soil aggregates, regardless of land management. Microaggregates supported more diverse microbial communities, both taxonomically and functionally. Calculation of a weighted proportional whole soil diversity, which accounted for microbes found in aggregate fractions, resulted in 65% greater bacterial richness and 100% greater fungal richness over independently sampled whole soil. Our results show microaggregates support a previously unrecognized diverse microbial community that likely effects microbial access and metabolism of soil substrates.},
doi = {10.1016/j.soilbio.2017.12.018},
journal = {Soil Biology and Biochemistry},
issn = {0038-0717},
number = C,
volume = 118,
place = {United States},
year = {2018},
month = {3}
}