Long-term salinity tolerance is accompanied by major restructuring of the coral bacterial microbiome

Röthig, Till; Ochsenkühn, Michael A.; Roik, Anna; van der Merwe, Riaan; Voolstra, Christian R.

Long-term salinity tolerance is accompanied by major restructuring of the coral bacterial microbiome

Dateien

Roethig_2-13365pl1xnjkv6.pdfGröße: 379.11 KBDownloads: 185

Datum

2016

Autor:innen

Röthig, Till

Ochsenkühn, Michael A.

Roik, Anna

van der Merwe, Riaan

Voolstra, Christian R.

Open Access-Veröffentlichung

Open Access Hybrid

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Molecular ecology. Wiley-Blackwell - STM. 2016, 25(6), pp. 1308-1323. ISSN 0962-1083. eISSN 1365-294X. Available under: doi: 10.1111/mec.13567

Zusammenfassung

Scleractinian corals are assumed to be stenohaline osmoconformers, although they are frequently subjected to variations in seawater salinity due to precipitation, freshwater run-off and other processes. Observed responses to altered salinity levels include differences in photosynthetic performance, respiration and increased bleaching and mortality of the coral host and its algal symbiont, but a study looking at bacterial community changes is lacking. Here, we exposed the coral Fungia granulosa to strongly increased salinity levels in short- and long-term experiments to disentangle temporal and compartment effects of the coral holobiont (i.e. coral host, symbiotic algae and associated bacteria). Our results show a significant reduction in calcification and photosynthesis, but a stable microbiome after short-term exposure to high-salinity levels. By comparison, long-term exposure yielded unchanged photosynthesis levels and visually healthy coral colonies indicating long-term acclimation to high-salinity levels that were accompanied by a major coral microbiome restructuring. Importantly, a bacterium in the family Rhodobacteraceae was succeeded by Pseudomonas veronii as the numerically most abundant taxon. Further, taxonomy-based functional profiling indicates a shift in the bacterial community towards increased osmolyte production, sulphur oxidation and nitrogen fixation. Our study highlights that bacterial community composition in corals can change within days to weeks under altered environmental conditions, where shifts in the microbiome may enable adjustment of the coral to a more advantageous holobiont composition.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

bacterial community profiling, coral holobiont, coral reef, Fungia granulosa, microbiome, Red Sea

Zitieren

ISO 690

RÖTHIG, Till, Michael A. OCHSENKÜHN, Anna ROIK, Riaan VAN DER MERWE, Christian R. VOOLSTRA, 2016. Long-term salinity tolerance is accompanied by major restructuring of the coral bacterial microbiome. In: Molecular ecology. Wiley-Blackwell - STM. 2016, 25(6), pp. 1308-1323. ISSN 0962-1083. eISSN 1365-294X. Available under: doi: 10.1111/mec.13567

BibTex

@article{Rothig2016-03Longt-51151,
  year={2016},
  doi={10.1111/mec.13567},
  title={Long-term salinity tolerance is accompanied by major restructuring of the coral bacterial microbiome},
  number={6},
  volume={25},
  issn={0962-1083},
  journal={Molecular ecology},
  pages={1308--1323},
  author={Röthig, Till and Ochsenkühn, Michael A. and Roik, Anna and van der Merwe, Riaan and Voolstra, Christian R.}
}

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