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Intraspecific variation in metal tolerance modulate competition between two marine diatoms

Andersson, Björn ; Godhe, Anna LU ; Filipsson, Helena L. LU orcid ; Zetterholm, Linda ; Edler, Lars ; Berglund, Olof LU and Rengefors, Karin LU (2022) In ISME Journal 16. p.511-520
Abstract

Despite widespread metal pollution of coastal ecosystems, little is known of its effect on marine phytoplankton. We designed a co-cultivation experiment to test if toxic dose–response relationships can be used to predict the competitive outcome of two species under metal stress. Specifically, we took into account intraspecific strain variation and selection. We used 72 h dose–response relationships to model how silver (Ag), cadmium (Cd), and copper (Cu) affect both intraspecific strain selection and competition between taxa in two marine diatoms (Skeletonema marinoi and Thalassiosira baltica). The models were validated against 10-day co-culture experiments, using four strains per species. In the control treatment, we could predict the... (More)

Despite widespread metal pollution of coastal ecosystems, little is known of its effect on marine phytoplankton. We designed a co-cultivation experiment to test if toxic dose–response relationships can be used to predict the competitive outcome of two species under metal stress. Specifically, we took into account intraspecific strain variation and selection. We used 72 h dose–response relationships to model how silver (Ag), cadmium (Cd), and copper (Cu) affect both intraspecific strain selection and competition between taxa in two marine diatoms (Skeletonema marinoi and Thalassiosira baltica). The models were validated against 10-day co-culture experiments, using four strains per species. In the control treatment, we could predict the outcome using strain-specific growth rates, suggesting low levels of competitive interactions between the species. Our models correctly predicted which species would gain a competitive advantage under toxic stress. However, the absolute inhibition levels were confounded by the development of chronic toxic stress, resulting in a higher long-term inhibition by Cd and Cu. We failed to detect species differences in average Cu tolerance, but the model accounting for strain selection accurately predicted a competitive advantage for T. baltica. Our findings demonstrate the importance of incorporating multiple strains when determining traits and when performing microbial competition experiments.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
plankton, metal pollution
in
ISME Journal
volume
16
article number
https://doi.org/10.1038/s41396-021-01092-9
pages
511 - 520
publisher
Nature Publishing Group
external identifiers
  • scopus:85113809434
  • pmid:34446855
ISSN
1751-7362
DOI
10.1038/s41396-021-01092-9
project
Future landscapes depend on their communities - how does a plankton Community adapt to metal contamination
language
English
LU publication?
yes
additional info
Funding Information: This project was funded by the Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS) grant number 2016-00594, and the Oscar and Lili Lamm Foundation grant number FO2018-0042.
id
f70b22ff-76a3-4f06-9b7f-f397418f7b88
date added to LUP
2021-09-08 15:45:10
date last changed
2024-06-15 16:00:58
@article{f70b22ff-76a3-4f06-9b7f-f397418f7b88,
  abstract     = {{<p>Despite widespread metal pollution of coastal ecosystems, little is known of its effect on marine phytoplankton. We designed a co-cultivation experiment to test if toxic dose–response relationships can be used to predict the competitive outcome of two species under metal stress. Specifically, we took into account intraspecific strain variation and selection. We used 72 h dose–response relationships to model how silver (Ag), cadmium (Cd), and copper (Cu) affect both intraspecific strain selection and competition between taxa in two marine diatoms (Skeletonema marinoi and Thalassiosira baltica). The models were validated against 10-day co-culture experiments, using four strains per species. In the control treatment, we could predict the outcome using strain-specific growth rates, suggesting low levels of competitive interactions between the species. Our models correctly predicted which species would gain a competitive advantage under toxic stress. However, the absolute inhibition levels were confounded by the development of chronic toxic stress, resulting in a higher long-term inhibition by Cd and Cu. We failed to detect species differences in average Cu tolerance, but the model accounting for strain selection accurately predicted a competitive advantage for T. baltica. Our findings demonstrate the importance of incorporating multiple strains when determining traits and when performing microbial competition experiments.</p>}},
  author       = {{Andersson, Björn and Godhe, Anna and Filipsson, Helena L. and Zetterholm, Linda and Edler, Lars and Berglund, Olof and Rengefors, Karin}},
  issn         = {{1751-7362}},
  keywords     = {{plankton; metal pollution}},
  language     = {{eng}},
  pages        = {{511--520}},
  publisher    = {{Nature Publishing Group}},
  series       = {{ISME Journal}},
  title        = {{Intraspecific variation in metal tolerance modulate competition between two marine diatoms}},
  url          = {{http://dx.doi.org/10.1038/s41396-021-01092-9}},
  doi          = {{10.1038/s41396-021-01092-9}},
  volume       = {{16}},
  year         = {{2022}},
}