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Identification of Associations between Bacterioplankton and Photosynthetic Picoeukaryotes in Coastal Waters
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. University of California at Santa Cruz, USA. (Ctr Ecol & Evolut Microbial Model Syst)ORCID iD: 0000-0003-3083-7437
University of California at Santa Cruz, USA.
University of California at Santa Cruz, USA.
2016 (English)In: Frontiers in Microbiology, ISSN 1664-302X, E-ISSN 1664-302X, Vol. 7, 339Article in journal (Refereed) Published
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Abstract [en]

Photosynthetic picoeukaryotes are significant contributors to marine primary productivity. Associations between marine bacterioplankton and picoeukaryotes frequently occur and can have large biogeochemical impacts. We used flow cytometry to sort cells from seawater to identify non-eukaryotic phylotypes that are associated with photosynthetic picoeukaryotes. Samples were collected at the Santa Cruz wharf on Monterey Bay, CA, USA during summer and fall, 2014. The phylogeny of associated microbes was assessed through 16S rRNA gene amplicon clone and Illumina MiSeq libraries. The most frequently detected bacterioplankton phyla within the photosynthetic picoeukaryote sorts were Proteobacteria (Alphaproteobacteria and Gammaproteobacteria) and Bacteroidetes. Intriguingly, the presence of free-living bacterial genera in the photosynthetic picoeukaryote sorts could suggest that some of the photosynthetic picoeukaryotes were mixotrophs. However, the occurrence of bacterial sequences, which were not prevalent in the corresponding bulk seawater samples, indicates that there was also a selection for specific OTUs in association with photosynthetic picoeukaryotes suggesting specific functional associations. The results show that diverse bacterial phylotypes are found in association with photosynthetic picoeukaryotes. Taxonomic identification of these associations is a prerequisite for further characterizing and to elucidate their metabolic pathways and ecological functions.

Place, publisher, year, edition, pages
2016. Vol. 7, 339
Keyword [en]
microbial associations, bacterivory, flow cytometry, photosynthetic picoeukaryotes, symbiosis
National Category
Microbiology
Research subject
Ecology, Microbiology
Identifiers
URN: urn:nbn:se:lnu:diva-52117DOI: 10.3389/fmicb.2016.00339ISI: 000372495500001Scopus ID: 2-s2.0-84964316472OAI: oai:DiVA.org:lnu-52117DiVA: diva2:920431
Available from: 2016-04-18 Created: 2016-04-18 Last updated: 2016-12-15Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
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Output format
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