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Eelgrass leaf surface microbiomes are locally variable and highly correlated with epibiotic eukaryotes

View ORCID ProfileMia M. Bengtsson, Anton Bühler, Anne Brauer, Sven Dahlke, Hendrik Schubert, View ORCID ProfileIrmgard Blindow
doi: https://doi.org/10.1101/111559
Mia M. Bengtsson
1Institute of Microbiology, University of Greifswald, Greifswald, Germany
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  • For correspondence: mia.bengtsson@uni-greifswald.de
Anton Bühler
2Institut fur Biowissenschaften, University of Rostock, Rostock, Germany
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Anne Brauer
1Institute of Microbiology, University of Greifswald, Greifswald, Germany
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Sven Dahlke
3Biological Station of Hiddensee, University of Greifswald, Kloster, Germany
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Hendrik Schubert
2Institut fur Biowissenschaften, University of Rostock, Rostock, Germany
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Irmgard Blindow
3Biological Station of Hiddensee, University of Greifswald, Kloster, Germany
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  • ORCID record for Irmgard Blindow
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ABSTRACT

Eelgrass (Zostera marina) is a marine foundation species essential for coastal ecosystem services around the northern hemisphere. Like all macroscopic organisms, it possesses a microbiome which may play critical roles in modulating the interaction of eelgrass with its environment. For example, its leaf surface microbiome could inhibit or attract eukaryotic epibionts which may overgrow the eelgrass leading to reduced primary productivity and subsequent eelgrass meadow decline. We used amplicon sequencing of the 16S and 18S rRNA genes of prokaryotes and eukaryotes to assess the leaf surface microbiome (prokaryotes) as well as eukaryotic epibionts in-and outside lagoons on the German Baltic Sea coast. Bacterial microbiomes varied substantially both between sites inside lagoons and between open coastal and lagoon sites. Water depth, leaf area and biofilm chlorophyll a concentration explained a large amount of variation in both bacterial and eukaryotic community composition. Communities of bacterial and eukaryotic epibionts were highly correlated, and network analysis revealed disproportionate co-occurrence between a limited number of eukaryotic taxa and several bacterial taxa. This suggests that eelgrass leaf surface biofilms are a mosaic of the microbiomes of several eukaryotes, in addition to that of the eelgrass itself, and underlines that eukaryotic microbial diversity should be taken into account in order to explain microbiome assembly and dynamics in aquatic environments.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted February 24, 2017.
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Eelgrass leaf surface microbiomes are locally variable and highly correlated with epibiotic eukaryotes
Mia M. Bengtsson, Anton Bühler, Anne Brauer, Sven Dahlke, Hendrik Schubert, Irmgard Blindow
bioRxiv 111559; doi: https://doi.org/10.1101/111559
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Eelgrass leaf surface microbiomes are locally variable and highly correlated with epibiotic eukaryotes
Mia M. Bengtsson, Anton Bühler, Anne Brauer, Sven Dahlke, Hendrik Schubert, Irmgard Blindow
bioRxiv 111559; doi: https://doi.org/10.1101/111559

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