Recurrent microbial community types driven by nearshore and seasonal processes in coastal Southern California

Summary A multitude of concurrent biological and physical processes contribute to microbial community turnover, especially in highly dynamic coastal environments. Characterizing what factors contribute most to shifts in microbial community structure and the specific organisms that correlate with cha...

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Bibliographic Details
Published in:Environmental microbiology 2021-06, Vol.23 (6), p.3225-3239
Main Authors: Wilson, Jesse M., Chamberlain, Emelia J., Erazo, Natalia, Carter, Melissa L., Bowman, Jeff S.
Format: Article
Language:English
Subjects:
Biological activity
Biotic factors
Chlorophyll
Chlorophyll a
Coastal environments
Coastal processes
Coastal zones
Community structure
Ecological function
Flow cytometry
Gene sequencing
High frequency
Microbial activity
Microbiomes
Microorganisms
Network analysis
Nutrient availability
Photosynthesis
Physicochemical processes
Physicochemical properties
rRNA 16S
Weekly
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Summary:Summary A multitude of concurrent biological and physical processes contribute to microbial community turnover, especially in highly dynamic coastal environments. Characterizing what factors contribute most to shifts in microbial community structure and the specific organisms that correlate with changes in the products of photosynthesis improves our understanding of nearshore microbial ecosystem functions. We conducted high frequency sampling in nearshore Southern California in order to capture sub‐weekly microbial community dynamics. Microbial communities were characterized by flow cytometry and 16S rRNA gene sequencing, and placed in the context of physicochemical parameters. Within our time‐series, season and nutrient availability corresponded to changes in dominant microbial community members. Concurrent aseasonal drivers with overlapping scales of variability were also apparent when we used network analysis to assess the microbial community as subsets of the whole. Our analyses revealed the microbial community as a mosaic, with overlapping groups of taxa that varied on different timescales and correlated with unique abiotic and biotic factors. Specifically, a subnetwork associated with chlorophyll a exhibited rapid turnover, indicating that ecologically important subsets of the microbial community can change on timescales different than and in response to factors other than those that govern turnover of most members of the assemblage.
ISSN:1462-2912
1462-2920
DOI:10.1111/1462-2920.15548