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- W2317804537 abstract "AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials AME 74:263-277 (2015) - DOI: https://doi.org/10.3354/ame01740 Protist diversity along a salinity gradient in a coastal lagoon Sergio Balzano1,2,*, Elsa Abs1, Sophie C. Leterme1 1School of Biological Sciences, Flinders University, GPO Box 2100, Adelaide 5001, South Australia 2Present address: Department of Marine Organic Biogeochemistry, Royal Netherlands Institute for Sea Research, PO Box 59, 1790AB Den Burg, The Netherlands *Corresponding author: sergio.balzano@nioz.nl ABSTRACT: The importance of microbial eukaryotes to aquatic systems has been widely acknowledged in the last decade, and the application of high-throughput sequencing techniques has revealed an astonishing diversity and high proportions of novel taxa. Most studies have focused either on marine or freshwater ecosystems; thus, information on estuarine communities is either incomplete or missing. We assessed the composition of microbial eukaryotes along a South Australian coastal lagoon affected by a broad (7 to 65 PSU) salinity gradient, the Coorong Lagoon. This lagoon extends for over 170 km from the mouth of the River Murray (Murray Mouth) southwards, where the salinity increases up to hypersaline values. We sampled 5 stations during the austral summer and winter and sequenced the amplified V4 region of the 18S rRNA gene using Ion Torrent. Genetic libraries were mostly represented by reads from 5 phyla, with Chlorophyta prevailing in summer, diatoms in winter and Haptophyta in the southernmost sampling sites. In spite of the broad spatial and temporal salinity changes observed, the communities of small eukaryotes clustered in 2 groups reflecting the sample location. Moreover, dissimilarities between samples were unaffected by differences in salinity, but increased with increasing geographic distances. Microbial exchanges from the Coorong Lagoon towards both freshwater and seawater occur via the Murray Mouth and are likely to prevent the formation of communities adapted to local salinity conditions. However, such exchanges likely decrease with increasing distances from the Murray Mouth, resulting in distance-driven eukaryotic communities. KEY WORDS: Microbial eukaryotes · V4 · 18S rRNA · Geographic distance · Weighted UniFrac · QIIME Full text in pdf format Supplement 1Supplement 2 PreviousCite this article as: Balzano S, Abs E, Leterme SC (2015) Protist diversity along a salinity gradient in a coastal lagoon. Aquat Microb Ecol 74:263-277. https://doi.org/10.3354/ame01740 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AME Vol. 74, No. 3. Online publication date: March 25, 2015 Print ISSN: 0948-3055; Online ISSN: 1616-1564 Copyright © 2015 Inter-Research." @default.
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- W2317804537 date "2015-03-25" @default.
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- W2317804537 title "Protist diversity along a salinity gradient in a coastal lagoon" @default.
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- W2317804537 doi "https://doi.org/10.3354/ame01740" @default.
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