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Contrasting prevalence of selection and drift in the community structuring of bacteria and microbial eukaryotes

Logares, Ramiro LU ; Tesson, Sylvie V.M. LU ; Canbäck, Björn LU ; Pontarp, Mikael LU ; Hedlund, Katarina LU and Rengefors, Karin LU (2018) In Environmental Microbiology 20(6). p.2231-2240
Abstract

Whether or not communities of microbial eukaryotes are structured in the same way as bacteria is a general and poorly explored question in ecology. Here, we investigated this question in a set of planktonic lake microbiotas in Eastern Antarctica that represent a natural community ecology experiment. Most of the analysed lakes emerged from the sea during the last 6000 years, giving rise to waterbodies that originally contained marine microbiotas and that subsequently evolved into habitats ranging from freshwater to hypersaline. We show that habitat diversification has promoted selection driven by the salinity gradient in bacterial communities (explaining ∼ 72% of taxa turnover), while microeukaryotic counterparts were predominantly... (More)

Whether or not communities of microbial eukaryotes are structured in the same way as bacteria is a general and poorly explored question in ecology. Here, we investigated this question in a set of planktonic lake microbiotas in Eastern Antarctica that represent a natural community ecology experiment. Most of the analysed lakes emerged from the sea during the last 6000 years, giving rise to waterbodies that originally contained marine microbiotas and that subsequently evolved into habitats ranging from freshwater to hypersaline. We show that habitat diversification has promoted selection driven by the salinity gradient in bacterial communities (explaining ∼ 72% of taxa turnover), while microeukaryotic counterparts were predominantly structured by ecological drift (∼72% of the turnover). Nevertheless, we also detected a number of microeukaryotes with specific responses to salinity, indicating that albeit minor, selection has had a role in the structuring of specific members of their communities. In sum, we conclude that microeukaryotes and bacteria inhabiting the same communities can be structured predominantly by different processes. This should be considered in future studies aiming to understand the mechanisms that shape microbial assemblages.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Environmental Microbiology
volume
20
issue
6
pages
2231 - 2240
publisher
Wiley-Blackwell
external identifiers
  • scopus:85050687493
ISSN
1462-2912
DOI
10.1111/1462-2920.14265
language
English
LU publication?
yes
id
32676e8e-c738-4c9b-b5d6-b71f296ec3fa
date added to LUP
2018-11-15 08:05:15
date last changed
2019-03-12 04:17:55
@article{32676e8e-c738-4c9b-b5d6-b71f296ec3fa,
  abstract     = {<p>Whether or not communities of microbial eukaryotes are structured in the same way as bacteria is a general and poorly explored question in ecology. Here, we investigated this question in a set of planktonic lake microbiotas in Eastern Antarctica that represent a natural community ecology experiment. Most of the analysed lakes emerged from the sea during the last 6000 years, giving rise to waterbodies that originally contained marine microbiotas and that subsequently evolved into habitats ranging from freshwater to hypersaline. We show that habitat diversification has promoted selection driven by the salinity gradient in bacterial communities (explaining ∼ 72% of taxa turnover), while microeukaryotic counterparts were predominantly structured by ecological drift (∼72% of the turnover). Nevertheless, we also detected a number of microeukaryotes with specific responses to salinity, indicating that albeit minor, selection has had a role in the structuring of specific members of their communities. In sum, we conclude that microeukaryotes and bacteria inhabiting the same communities can be structured predominantly by different processes. This should be considered in future studies aiming to understand the mechanisms that shape microbial assemblages.</p>},
  author       = {Logares, Ramiro and Tesson, Sylvie V.M. and Canbäck, Björn and Pontarp, Mikael and Hedlund, Katarina and Rengefors, Karin},
  issn         = {1462-2912},
  language     = {eng},
  month        = {06},
  number       = {6},
  pages        = {2231--2240},
  publisher    = {Wiley-Blackwell},
  series       = {Environmental Microbiology},
  title        = {Contrasting prevalence of selection and drift in the community structuring of bacteria and microbial eukaryotes},
  url          = {http://dx.doi.org/10.1111/1462-2920.14265},
  volume       = {20},
  year         = {2018},
}