skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Spatio-temporal microbial community dynamics within soil aggregates

Journal Article · · Soil Biology and Biochemistry
ORCiD logo [1]; ORCiD logo [2];  [3]
  1. Iowa State Univ., Ames, IA (United States)
  2. Colorado State Univ., Fort Collins, CO (United States)
  3. Iowa State Univ., Ames, IA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

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.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0010775; AC05-76RL01830; DESC0010775
OSTI ID:
1558619
Alternate ID(s):
OSTI ID: 1636081; OSTI ID: 1872722
Report Number(s):
PNNL-SA-139179
Journal Information:
Soil Biology and Biochemistry, Vol. 132, Issue C; ISSN 0038-0717
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 78 works
Citation information provided by
Web of Science

References (85)

Microscale Insight into Microbial Seed Banks journal January 2017
Possible role of soil microorganisms in aggregation in soils journal February 1994
Rainforest Conversion to Rubber Plantation May Not Result in Lower Soil Diversity of Bacteria, Fungi, and Nematodes journal May 2016
Global patterns in bacterial diversity journal June 2007
Elevated CO2 and plant species richness impact arbuscular mycorrhizal fungal spore communities journal March 2003
Microbial diversity and soil functions journal January 2017
Importance of mechanisms and processes of the stabilisation of soil organic matter for modelling carbon turnover journal January 2003
Assembling the fungal tree of life: progress, classification, and evolution of subcellular traits journal October 2004
Carbon input by roots into the soil: Quantification of rhizodeposition from root to ecosystem scale journal September 2017
Soil organic matter, biota and aggregation in temperate and tropical soils - Effects of no-tillage journal November 2002
A time for every season: soil aggregate turnover stimulates decomposition and reduces carbon loss in grasslands managed for bioenergy journal June 2015
Enhancement of Biodiversity and Ecosystem Services by Ecological Restoration: A Meta-Analysis journal July 2009
Cover Crop and Irrigation Effects on Soil Microbial Communities and Enzymes in Semiarid Agroecosystems of the Central Great Plains of North America journal April 2016
Biodiversity effects in the wild are common and as strong as key drivers of productivity journal September 2017
Soil Structure and Organic Matter journal January 2000
Plant Diversity, soil Microbial Communities, and Ecosystem Function: are There any Links? journal August 2003
Long term tillage, cover crop, and fertilization effects on microbial community structure, activity: Implications for soil quality journal October 2015
Biodiversity enhances ecosystem reliability journal December 1997
The Microbial Efficiency-Matrix Stabilization (MEMS) framework integrates plant litter decomposition with soil organic matter stabilization: do labile plant inputs form stable soil organic matter? journal February 2013
Black carbon decomposition and incorporation into soil microbial biomass estimated by 14C labeling journal February 2009
Spatial soil ecology journal April 2002
Too much or not enough: Reflection on two contrasting perspectives on soil biodiversity journal December 2016
Sequence Depth, Not PCR Replication, Improves Ecological Inference from Next Generation DNA Sequencing journal February 2014
Belowground response of prairie restoration and resiliency to drought journal November 2018
Root Exudates Regulate Soil Fungal Community Composition and Diversity journal December 2007
Interactions between soil structure and fungi journal January 1999
Minerals in the rhizosphere: overlooked mediators of soil nitrogen availability to plants and microbes journal June 2018
Ecology of the forest microbiome: Highlights of temperate and boreal ecosystems journal December 2016
Nonmetric multidimensional scaling: A numerical method journal June 1964
Plant diversity increases soil microbial activity and soil carbon storage journal April 2015
A first comprehensive census of fungi in soil reveals both hyperdiversity and fine-scale niche partitioning journal February 2014
Microbial hotspots and hot moments in soil: Concept & review journal April 2015
Patterns and Processes of Microbial Community Assembly journal September 2013
Measurements of microbial community activities in individual soil macroaggregates journal May 2012
Bioenergy cropping systems that incorporate native grasses stimulate growth of plant-associated soil microbes in the absence of nitrogen fertilization journal October 2016
Consistent responses of soil microbial communities to elevated nutrient inputs in grasslands across the globe journal August 2015
Microbial Community Profiles and Activities among Aggregates of Winter Fallow and Cover-Cropped Soil journal January 2002
Crop rotational diversity enhances belowground communities and functions in an agroecosystem journal May 2015
Linking microbial community structure to β-glucosidic function in soil aggregates journal May 2013
Occurrence of benthic microbial nitrogen fixation coupled to sulfate reduction in the seasonally hypoxic Eckernförde Bay, Baltic Sea journal January 2013
Soil texture affects soil microbial and structural recovery during grassland restoration journal December 2010
UPARSE: highly accurate OTU sequences from microbial amplicon reads journal August 2013
Does diversity beget diversity? A case study of crops and weeds journal April 1997
Soil macroaggregate turnover and microaggregate formation: a mechanism for C sequestration under no-tillage agriculture journal December 2000
Biodiversity at multiple trophic levels is needed for ecosystem multifunctionality journal August 2016
Contributions of interacting biological mechanisms to soil aggregate stabilization in restored prairie1The submitted manuscript has been created by the University of Chicago as operator of Argonne National Laboratory under Contract No. W-31-109-ENG-38 with the U.S. Department of Energy.1 journal July 1998
Towards a unified paradigm for sequence-based identification of fungi journal September 2013
Stoichiometry constrains microbial response to root exudation- insights from a model and a field experiment in a temperate forest journal January 2013
Soil organic matter turnover is governed by accessibility not recalcitrance journal March 2012
Carbon Turnover in Soil Physical Fractions journal July 1994
Importance of rhizodeposition in the coupling of plant and microbial productivity journal December 2003
The contentious nature of soil organic matter journal November 2015
Global biogeography of microbial nitrogen-cycling traits in soil journal July 2016
Global diversity and geography of soil fungi journal November 2014
Environmental Filtering of Microbial Communities in Agricultural Soil Shifts with Crop Growth journal July 2015
Nitrogen fertilization increases diversity and productivity of prairie communities used for bioenergy journal June 2012
Mapping field-scale spatial patterns of size and activity of the denitrifier community journal June 2009
A new fungal phylum, the Glomeromycota: phylogeny and evolution journal December 2001
Tillage, habitat space and function of soil microbes journal February 2000
The rhizosphere microbiome and plant health journal August 2012
BLAST+: architecture and applications journal January 2009
Tillage and Manure Effects on Soil and Aggregate-Associated Carbon and Nitrogen journal May 2004
Microbial interactions and community assembly at microscales journal June 2016
Soil aggregate dynamics and the retention of organic matter in laboratory-incubated soil with differing simulated tillage frequencies journal June 2002
QIIME allows analysis of high-throughput community sequencing data journal April 2010
Multi-scale variation in spatial heterogeneity for microbial community structure in an eastern Virginia agricultural field journal June 2003
Plant and soil fungal but not soil bacterial communities are linked in long-term fertilized grassland journal March 2016
Soil aggregates as massively concurrent evolutionary incubators journal April 2017
Microbial control over carbon cycling in soil journal January 2012
Stabilization mechanisms of soil organic matter: Implications for C-saturation of soils journal January 2002
Soil aggregate isolation method affects measures of intra-aggregate extracellular enzyme activity journal February 2014
Global Biogeographic Analysis of Methanogenic Archaea Identifies Community-Shaping Environmental Factors of Natural Environments journal July 2017
Soil-carbon response to warming dependent on microbial physiology journal April 2010
The Relationship between Carbon Input, Aggregation, and Soil Organic Carbon Stabilization in Sustainable Cropping Systems journal January 2005
Brown Ground: A Soil Carbon Analogue for the Green World Hypothesis? journal May 2006
Biodiversity and Ecosystem Functioning: Current Knowledge and Future Challenges journal October 2001
A history of research on the link between (micro)aggregates, soil biota, and soil organic matter dynamics journal September 2004
The Problem of Pattern and Scale in Ecology: The Robert H. MacArthur Award Lecture journal December 1992
Spatial distribution of microbial biomass in microaggregates of a silty-loam soil and the relation with the resistance of microorganisms to soil drying journal April 1996
Greatest soil microbial diversity found in micro-habitats journal March 2018
The Microbial Engines That Drive Earth's Biogeochemical Cycles journal May 2008
Microbial ecology: Linking omics to biogeochemistry journal January 2016
The unseen majority: soil microbes as drivers of plant diversity and productivity in terrestrial ecosystems journal March 2008
Carbon and Nitrogen Distribution in Aggregates from Cultivated and Native Grassland Soils journal July 1993
Bacterial diversity in water-stable aggregates of soils under conventional and zero tillage management journal March 2001

Cited By (2)