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Microorganisms 2017, 5(2), 31; doi:10.3390/microorganisms5020031

Changes in Microbial (Bacteria and Archaea) Plankton Community Structure after Artificial Dispersal in Grazer-Free Microcosms

1
Department of Biological Applications and Technology, University of Ioannina, 45110 Ioannina, Greece
2
University of Glasgow, BAHCM Institute and School of Life Sciences, Glasgow G12 8QQ, Scotland, UK
3
Laboratoire d’Océanologie et Géosciences (LOG), UMR CNRS 8187, Université du Littoral Côte d’Opale (ULCO), 32 av. Foch, 62930 Wimereux, France
4
Sorbonne Universités, UPMC Univ Paris 06, UMS2348, Laboratoire d’Océanographie Microbienne, Observatoire Océanologique, 66650 Banyuls-sur-mer, France
5
Department of Ichthyology & Aquatic Environment, University of Thessaly, 383 46 Volos, Greece
*
Author to whom correspondence should be addressed.
Academic Editor: Martin von Bergen
Received: 16 December 2016 / Revised: 16 May 2017 / Accepted: 30 May 2017 / Published: 3 June 2017
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Abstract

Microbes are considered to have a global distribution due to their high dispersal capabilities. However, our knowledge of the way geographically distant microbial communities assemble after dispersal in a new environment is limited. In this study, we examined whether communities would converge because similar taxa would be selected under the same environmental conditions, or would diverge because of initial community composition, after artificial dispersal. To this aim, a microcosm experiment was performed, in which the temporal changes in the composition and diversity of different prokaryoplankton assemblages from three distant geographic coastal areas (Banyuls-sur-Mer in northwest Mediterranean Sea, Pagasitikos Gulf in northeast Mediterranean and Woods Hole, MA, USA in the northwest Atlantic), were studied. Diversity was investigated using amplicon pyrosequencing of the V1–V3 hypervariable regions of the 16S rRNA. The three assemblages were grown separately in particle free and autoclaved Banyuls-sur-mer seawater at 18 °C in the dark. We found that the variability of prokaryoplankton community diversity (expressed as richness, evenness and dominance) as well as the composition were driven by patterns observed in Bacteria. Regarding community composition, similarities were found between treatments at family level. However, at the OTU level microbial communities from the three different original locations diverge rather than converge during incubation. It is suggested that slight differences in the composition of the initial prokaryoplankton communities, resulted in separate clusters the following days even when growth took place under identical abiotic conditions. View Full-Text
Keywords: microbial assemblage; diversity; community; 16S rRNA; microcosms; pyrosequencing; mixing; biogeography; dispersion microbial assemblage; diversity; community; 16S rRNA; microcosms; pyrosequencing; mixing; biogeography; dispersion
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MDPI and ACS Style

Karayanni, H.; Meziti, A.; Spatharis, S.; Genitsaris, S.; Courties, C.; Kormas, K.A. Changes in Microbial (Bacteria and Archaea) Plankton Community Structure after Artificial Dispersal in Grazer-Free Microcosms. Microorganisms 2017, 5, 31.

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