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The environment drives microbial trait variability in aquatic habitats

Beier, Sara and Andersson, Anders F. and Galand, Pierre E. and Hochart, Corentin and Logue, Juerg B. and McMahon, Katherine and Bertilsson, Stefan (2020). The environment drives microbial trait variability in aquatic habitats. Molecular Ecology. 29 , 4605-4617
[Journal article]

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Abstract

A prerequisite to improve the predictability of microbial community dynamics is to understand the mechanisms of microbial assembly. To study factors that contribute to microbial community assembly, we examined the temporal dynamics of genes in five aquatic metagenome time-series, originating from marine offshore or coastal sites and one lake. With this trait-based approach we expected to find gene-specific patterns of temporal allele variability that depended on the seasonal metacommunity size of carrier-taxa and the variability of the milieu and the substrates to which the resulting proteins were exposed. In more detail, we hypothesized that a larger seasonal metacommunity size would result in increased temporal variability of functional units (i.e., gene alleles), as shown previously for taxonomic units. We further hypothesized that multicopy genes would feature higher temporal variability than single-copy genes, as gene multiplication can result from high variability in substrate quality and quantity. Finally, we hypothesized that direct exposure of proteins to the extracellular environment would result in increased temporal variability of the respective gene compared to intracellular proteins that are less exposed to environmental fluctuations. The first two hypotheses were confirmed in all data sets, while significant effects of the subcellular location of gene products was only seen in three of the five time-series. The gene with the highest allele variability throughout all data sets was an iron transporter, also representing a target for phage infection. Previous work has emphasized the role of phage-prokaryote interactions as a major driver of microbial diversity. Our finding therefore points to a potentially important role of iron transporter-mediated phage infections for the assembly and maintenance of diversity in aquatic prokaryotes.

Authors/Creators:Beier, Sara and Andersson, Anders F. and Galand, Pierre E. and Hochart, Corentin and Logue, Juerg B. and McMahon, Katherine and Bertilsson, Stefan
Title:The environment drives microbial trait variability in aquatic habitats
Year of publishing :2020
Volume:29
Page range:4605-4617
Number of Pages:13
Publisher:WILEY
ISSN:0962-1083
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:community ecology, ecological genetics, marine environments, metagenomics, microbial ecology, time-series
URN:NBN:urn:nbn:se:slu:epsilon-p-108647
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-108647
Additional ID:
Type of IDID
DOI10.1111/mec.15656
Web of Science (WoS)000578872400001
ID Code:19818
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:30 Dec 2020 05:23
Metadata Last Modified:15 Jan 2021 19:17

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