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Consistency in microbiomes in cultures of Alexandrium species isolated from brackish and marine waters
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2019 (English)In: Environmental Microbiology Reports, ISSN 1758-2229, E-ISSN 1758-2229, Vol. 11, no 3, p. 425-433Article in journal (Refereed) Published
Abstract [en]

Phytoplankton and bacteria interactions have a significant role in aquatic ecosystem functioning. Associations can range from mutualistic to parasitic, shaping biogeochemical cycles and having a direct influence on phytoplankton growth. How variations in phenotype and sampling location, affect the phytoplankton microbiome is largely unknown. A high-resolution characterization of the bacterial community in cultures of the dinoflagellate Alexandrium was performed on strains isolated from different geographical locations and at varying anthropogenic impact levels. Microbiomes of Baltic Sea Alexandrium ostenfeldii isolates were dominated by Betaproteobacteria and were consistent over phenotypic and genotypic Alexandrium strain variation, resulting in identification of an A. ostenfeldii core microbiome. Comparisons with in situ bacterial communities showed that taxa found in this A. ostenfeldii core were specifically associated to dinoflagellate dynamics in the Baltic Sea. Microbiomes of Alexandrium tamarense and minutum, isolated from the Mediterranean Sea, differed from those of A. ostenfeldii in bacterial diversity and composition but displayed high consistency, and a core set of bacterial taxa was identified. This indicates that Alexandrium isolates with diverse phenotypes host predictable, species-specific, core microbiomes reflecting the abiotic conditions from which they were isolated. These findings enable in-depth studies of potential interactions occurring between Alexandrium and specific bacterial taxa.

Place, publisher, year, edition, pages
WILEY , 2019. Vol. 11, no 3, p. 425-433
Identifiers
URN: urn:nbn:se:umu:diva-162551DOI: 10.1111/1758-2229.12736ISI: 000468000600014PubMedID: 30672139OAI: oai:DiVA.org:umu-162551DiVA, id: diva2:1344826
Available from: 2019-08-22 Created: 2019-08-22 Last updated: 2019-08-22

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