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

Open access
Tripathi, Binu M, Stegen, James C, Kim, Mincheol, Dong, Ke, Adams, Jonathan M, Lee, Yoo Kyung·2018·The ISME Journal

Abstract

Little is known about the factors affecting the relative influences of stochastic and deterministic processes that govern the assembly of microbial communities in successional soils. Here, we conducted a meta-analysis of bacterial communities using six different successional soil datasets distributed across different regions. Different relationships between pH and successional age across these datasets allowed us to separate the influences of successional age (i.e., time) from soil pH. We found that 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.

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Metadata

Authors
Tripathi, B. M., Stegen, J. C., Kim, M., Dong, K., Adams, J. M., & Lee, Y. K.
Venue
The ISME Journal
Published
2018-03-07
Volume
12
Issue
4
Pages
1072-1083
ISSN
  • 1751-7362 (ISSN-L)
  • 1751-7370
OpenAlex
W2792188298
Cited by
1,049
References
59
FWCI
49.97
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Soil pH mediates the balance between stochastic and deterministic assembly of bacteria. https://app.cochat.ai/papers/10.1038/s41396-018-0082-4
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Tripathi, B. M., Stegen, J. C., Kim, M., Dong, K., Adams, J. M., & Lee, Y. K. (2018). Soil pH mediates the balance between stochastic and deterministic assembly of bacteria. The ISME Journal. https://doi.org/10.1038/s41396-018-0082-4

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