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

Title: Soil pH mediates the balance between stochastic and deterministic assembly of bacteria

Journal Article · · The ISME Journal

Little is known about the factors affecting the relative influence of stochastic and deterministic processes that governs the assembly of microbial communities in successional soils. Here, we conducted a meta-analysis of bacterial communities using six different successional soils data sets, scattered across different regions, with different pH conditions in early and late successional soils. We found that soil pH was the best predictor of bacterial community assembly and the relative importance of stochastic and deterministic processes along successional soils. Extreme acidic or alkaline pH conditions lead to assembly of phylogenetically more clustered bacterial communities through deterministic processes, whereas pH conditions close to neutral lead to phylogenetically less clustered bacterial communities with more stochasticity. We suggest that the influence of pH, rather than successional age, is the main driving force in producing trends in phylogenetic assembly of bacteria, and that pH also influences the relative balance of stochastic and deterministic processes along successional soils. Given that pH had a much stronger association with community assembly than did successional age, we evaluated whether the inferred influence of pH was maintained when studying globally-distributed samples collected without regard for successional age. This dataset confirmed the strong influence of pH, suggesting that the influence of soil pH on community assembly processes occurs globally. Extreme pH conditions likely exert more stringent limits on survival and fitness, imposing strong selective pressures through ecological and evolutionary time. Taken together, these findings suggest that the degree to which stochastic vs. deterministic processes shape soil bacterial community assembly is a consequence of soil pH rather than successional age.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1439021
Report Number(s):
PNNL-SA-129633
Journal Information:
The ISME Journal, Vol. 12, Issue none; ISSN 1751-7362
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English

References (54)

Species sorting and neutral processes are both important during the initial assembly of bacterial communities journal January 2011
UCHIME improves sensitivity and speed of chimera detection journal June 2011
Estimating and mapping ecological processes influencing microbial community assembly journal May 2015
Bacterial diversity in a glacier foreland of the high Arctic journal March 2010
The ecodist Package for Dissimilarity-based Analysis of Ecological Data journal January 2007
Seed arrival and ecological filters interact to assemble high-diversity plant communities journal March 2011
PANDAseq: paired-end assembler for illumina sequences journal January 2012
The merging of community ecology and phylogenetic biology journal July 2009
Nitrogen fixation in different biogeochemical niches along a 120 000-year chronosequence in New Zealand journal August 2009
Bacterial communities in soil mimic patterns of vegetative succession and ecosystem climax but are resilient to change between seasons journal February 2013
Phylogenetic beta diversity in bacterial assemblages across ecosystems: deterministic versus stochastic processes journal February 2013
Mechanisms of Maintenance of Species Diversity journal November 2000
Stochastic and deterministic assembly processes in subsurface microbial communities journal March 2012
Pyrosequencing-Based Assessment of Soil pH as a Predictor of Soil Bacterial Community Structure at the Continental Scale journal June 2009
FastTree 2 – Approximately Maximum-Likelihood Trees for Large Alignments journal March 2010
Biogeochemical drivers of microbial community convergence across actively retreating glaciers journal October 2016
Phylogenies and Community Ecology journal November 2002
Testing the spatial phylogenetic structure of local communities: statistical performances of different null models and test statistics on a locally neutral community: Testing spatial community phylogenetic structure journal August 2008
Disentangling mechanisms that mediate the balance between stochastic and deterministic processes in microbial succession journal March 2015
Neutral theory and community ecology: Neutral theory and community ecology journal February 2004
Phylogenetic Clustering and Overdispersion in Bacterial Communities journal July 2006
Patterns and Processes of Microbial Community Assembly journal September 2013
Disentangling the importance of ecological niches from stochastic processes across scales journal August 2011
Soil bacterial community succession during long-term ecosystem development journal June 2013
Contrasting assembly processes in a bacterial metacommunity along a desiccation gradient journal December 2014
Contrasting primary successional trajectories of fungi and bacteria in retreating glacier soils journal September 2013
Drought mediates the importance of stochastic community assembly journal October 2007
How to model species responses along ecological gradients - Huisman-Olff-Fresco models revisited journal February 2013
Dynamics of bacterial community succession in a salt marsh chronosequence: evidences for temporal niche partitioning journal April 2014
Stochasticity, succession, and environmental perturbations in a fluidic ecosystem journal February 2014
Insight into biases and sequencing errors for amplicon sequencing with the Illumina MiSeq platform journal January 2015
Phylogenetic community structure and phylogenetic turnover across space and edaphic gradients in western Amazonian tree communities journal August 2011
Vertical distribution of the soil microbiota along a successional gradient in a glacier forefield journal January 2015
Soil bacterial and fungal communities across a pH gradient in an arable soil journal May 2010
Theory predicts a rapid transition from niche-structured to neutral biodiversity patterns across a speciation-rate gradient journal February 2011
The bacterial biogeography of British soils: Mapping soil bacteria journal April 2011
A hierarchical set of models for species response analysis journal February 1993
Evolution of carbon fluxes during initial soil formation along the forefield of Damma glacier, Switzerland journal September 2012
Introducing mothur: Open-Source, Platform-Independent, Community-Supported Software for Describing and Comparing Microbial Communities journal October 2009
Quantifying community assembly processes and identifying features that impose them journal June 2013
Changes in assembly processes in soil bacterial communities following a wildfire disturbance journal February 2013
Spatial Scaling Effects on Soil Bacterial Communities in Malaysian Tropical Forests journal March 2014
Soil bacterial diversity in the Arctic is not fundamentally different from that found in other biomes: Bacterial biogeography in arctic soils journal November 2010
Tropical Soil Bacterial Communities in Malaysia: pH Dominates in the Equatorial Tropics Too journal February 2012
Phylogenetic niche conservatism, phylogenetic signal and the relationship between phylogenetic relatedness and ecological similarity among species journal October 2008
Soil Organic Phosphorus Transformations During Pedogenesis journal October 2007
Communities contain closely related species during ecosystem disturbance journal February 2010
The diversity and biogeography of soil bacterial communities journal January 2006
Shifts in bacterial community structure during succession in a glacier foreland of the High Arctic journal October 2016
Picante: R tools for integrating phylogenies and ecology journal April 2010
Community assembly and invasion: An experimental test of neutral versus niche processes journal July 2003
Phylogenetic diversity analyses reveal disparity between fungal and bacterial communities during microbial primary succession journal October 2015
Effects of dispersal and selection on stochastic assembly in microbial communities journal August 2016
Transitions in bacterial communities along the 2000 km salinity gradient of the Baltic Sea journal April 2011