Spatio-temporal microbial community dynamics within soil aggregates
Abstract
Soil microbial communities are highly spatially organized, shaped in part by the structure of soil itself. Understanding how spatially discrete microbial communities change across years and seasons in response to environmental factors, plant phenology and aggregate turnover, is key to understanding how varying management practices impact the ecology of soil microbial communities. We investigated both seasonal (within year) and annual (across sampling years) changes of discrete microbial communities in soil aggregate fractions, large macroaggregates (LM) and microaggregates (MICRO) in three different bioenergy management systems. We hypothesized that 1) seasonal changes due to plant phenology and aggregate turnover will be most pronounced within the MICRO aggregate soil microbial community; 2) inter-annual variability will lead to changes in microbial diversity across aggregate sizes and the magnitude of change will be mediated by management regime. We found that LM and MICRO aggregates have unique microbial communities within soil. MICRO aggregate microbial communities are more diverse and change more dynamically across the sampling season, peaking in diversity at peak plant growth and maximum biomass. The number of families indicative of specific MICRO aggregate habitats increases over the growing season for both bacteria (from 3 to 51) and fungi (from 8 to 14). The LMmore »
- Authors:
-
[1];
[2];
- Iowa State Univ., Ames, IA (United States)
- Colorado State Univ., Fort Collins, CO (United States)
- Iowa State Univ., Ames, IA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Publication Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1558619
- Alternate Identifier(s):
- OSTI ID: 1636081; OSTI ID: 1872722
- Report Number(s):
- PNNL-SA-139179
Journal ID: ISSN 0038-0717
- Grant/Contract Number:
- SC0010775; AC05-76RL01830; DESC0010775
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Soil Biology and Biochemistry
- Additional Journal Information:
- Journal Volume: 132; Journal Issue: C; Journal ID: ISSN 0038-0717
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; biodiversity; aggregate; bacteria; fungi; seasonal dynamics; prairie
Citation Formats
Upton, Racheal N., Bach, Elizabeth M., and Hofmockel, Kirsten S. Spatio-temporal microbial community dynamics within soil aggregates. United States: N. p., 2019.
Web. doi:10.1016/j.soilbio.2019.01.016.
Upton, Racheal N., Bach, Elizabeth M., & Hofmockel, Kirsten S. Spatio-temporal microbial community dynamics within soil aggregates. United States. https://doi.org/10.1016/j.soilbio.2019.01.016
Upton, Racheal N., Bach, Elizabeth M., and Hofmockel, Kirsten S. Wed .
"Spatio-temporal microbial community dynamics within soil aggregates". United States. https://doi.org/10.1016/j.soilbio.2019.01.016. https://www.osti.gov/servlets/purl/1558619.
@article{osti_1558619,
title = {Spatio-temporal microbial community dynamics within soil aggregates},
author = {Upton, Racheal N. and Bach, Elizabeth M. and Hofmockel, Kirsten S.},
abstractNote = {Soil microbial communities are highly spatially organized, shaped in part by the structure of soil itself. Understanding how spatially discrete microbial communities change across years and seasons in response to environmental factors, plant phenology and aggregate turnover, is key to understanding how varying management practices impact the ecology of soil microbial communities. We investigated both seasonal (within year) and annual (across sampling years) changes of discrete microbial communities in soil aggregate fractions, large macroaggregates (LM) and microaggregates (MICRO) in three different bioenergy management systems. We hypothesized that 1) seasonal changes due to plant phenology and aggregate turnover will be most pronounced within the MICRO aggregate soil microbial community; 2) inter-annual variability will lead to changes in microbial diversity across aggregate sizes and the magnitude of change will be mediated by management regime. We found that LM and MICRO aggregates have unique microbial communities within soil. MICRO aggregate microbial communities are more diverse and change more dynamically across the sampling season, peaking in diversity at peak plant growth and maximum biomass. The number of families indicative of specific MICRO aggregate habitats increases over the growing season for both bacteria (from 3 to 51) and fungi (from 8 to 14). The LM aggregates harbored less diverse, yet more stable, communities within a growing season. By contrast, between years the LM aggregates were the most responsive to inter-annual variability. Our study demonstrates the importance of including the spatio-temporal dynamics of soil microbes. We identified “hot spots” of microbial diversity within soil, with a greater diversity of microbes found under prairies, within the MICRO aggregates, and seasonally during peak plant biomass. Targeted analysis of the MICRO aggregates can contribute to deeper understanding of potential diversity and functioning of soil microbial communities for ecosystem maintenance as well as the response to climatic events and environmental change.},
doi = {10.1016/j.soilbio.2019.01.016},
journal = {Soil Biology and Biochemistry},
number = C,
volume = 132,
place = {United States},
year = {Wed May 01 00:00:00 EDT 2019},
month = {Wed May 01 00:00:00 EDT 2019}
}
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