TY - JOUR
T1 - Divergent Co-occurrence patterns and assembly processes structure the abundant and rare bacterial communities in a salt marsh ecosystem
AU - Du, Shicong
AU - Dini-Andreote, Francisco
AU - Zhang, Nan
AU - Liang, Chunling
AU - Yao, Zhiyuan
AU - Zhang, Huajun
AU - Zhang, Demin
N1 - Funding Information:
We thank David Z. Zhu for comments on an earlier version of this paper. The work was supported by the National Natural Science Foundation of China (grants 41977348, 41601517, and 41706132), the Natural Science Foundation of Ningbo (grant 2019A610445), the Natural Science Foundation of Ningbo University (grant XYL17023), and the K.C. Wong Magna Fund of Ningbo University. We declare no conflicts of interest.
Publisher Copyright:
© 2020 American Society for Microbiology.
PY - 2020/7/1
Y1 - 2020/7/1
N2 - Understanding how species interaction and assembly processes structure the abundant and rare bacterial biospheres in soils is crucial for predicting how biodiversity influences ecosystem functioning. Here, we profiled the bacterial communities across a salt marsh ecosystem gradient to investigate the co-occurrence patterns across taxa and the relative influence of ecological processes mediating the assembly of the abundant and rare biospheres in soil. Our results revealed abundant taxa to be ubiquitous across all sites, whereas the distributions of the rare taxa were relatively more site specific. The β-diversity indices and-diversity of rare subcommunities were significantly higher than those of the abundant subcommunities. Besides, both the taxonomic and functional composition of soil bacterial communities differed significantly between the two biospheres. Furthermore, the influence of stochasticity differed in each subcommunity. In particular, stochastic processes were relatively more important in constraining the assembly of rare taxa. Co-occurrence network analysis revealed that a few abundant taxa occupy central nodes within the networks, possibly indicating crucial roles as keystone taxa. Collectively, these findings suggest that abundant and rare bacterial biospheres have distinct distributions underpinned by a dynamic interplay of ecological processes and taxon cooccurrence patterns.
AB - Understanding how species interaction and assembly processes structure the abundant and rare bacterial biospheres in soils is crucial for predicting how biodiversity influences ecosystem functioning. Here, we profiled the bacterial communities across a salt marsh ecosystem gradient to investigate the co-occurrence patterns across taxa and the relative influence of ecological processes mediating the assembly of the abundant and rare biospheres in soil. Our results revealed abundant taxa to be ubiquitous across all sites, whereas the distributions of the rare taxa were relatively more site specific. The β-diversity indices and-diversity of rare subcommunities were significantly higher than those of the abundant subcommunities. Besides, both the taxonomic and functional composition of soil bacterial communities differed significantly between the two biospheres. Furthermore, the influence of stochasticity differed in each subcommunity. In particular, stochastic processes were relatively more important in constraining the assembly of rare taxa. Co-occurrence network analysis revealed that a few abundant taxa occupy central nodes within the networks, possibly indicating crucial roles as keystone taxa. Collectively, these findings suggest that abundant and rare bacterial biospheres have distinct distributions underpinned by a dynamic interplay of ecological processes and taxon cooccurrence patterns.
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U2 - 10.1128/AEM.00322-20
DO - 10.1128/AEM.00322-20
M3 - Article
C2 - 32358000
AN - SCOPUS:85086747776
SN - 0099-2240
VL - 86
JO - Applied and environmental microbiology
JF - Applied and environmental microbiology
IS - 13
M1 - e00322-20
ER -