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

Abstract

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 influencemore » 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.« less

Authors:
; ORCiD logo; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1439021
Report Number(s):
PNNL-SA-129633
Journal ID: ISSN 1751-7362
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: The ISME Journal; Journal Volume: 12; Journal Issue: none
Country of Publication:
United States
Language:
English

Citation Formats

Tripathi, Binu M., Stegen, James C., Kim, Mincheol, Dong, Ke, Adams, Jonathan M., and Lee, Yoo Kyung. Soil pH mediates the balance between stochastic and deterministic assembly of bacteria. United States: N. p., 2018. Web. doi:10.1038/s41396-018-0082-4.
Tripathi, Binu M., Stegen, James C., Kim, Mincheol, Dong, Ke, Adams, Jonathan M., & Lee, Yoo Kyung. Soil pH mediates the balance between stochastic and deterministic assembly of bacteria. United States. doi:10.1038/s41396-018-0082-4.
Tripathi, Binu M., Stegen, James C., Kim, Mincheol, Dong, Ke, Adams, Jonathan M., and Lee, Yoo Kyung. Wed . "Soil pH mediates the balance between stochastic and deterministic assembly of bacteria". United States. doi:10.1038/s41396-018-0082-4.
@article{osti_1439021,
title = {Soil pH mediates the balance between stochastic and deterministic assembly of bacteria},
author = {Tripathi, Binu M. and Stegen, James C. and Kim, Mincheol and Dong, Ke and Adams, Jonathan M. and Lee, Yoo Kyung},
abstractNote = {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.},
doi = {10.1038/s41396-018-0082-4},
journal = {The ISME Journal},
number = none,
volume = 12,
place = {United States},
year = {Wed Mar 07 00:00:00 EST 2018},
month = {Wed Mar 07 00:00:00 EST 2018}
}