Temporal and spatial dynamics of Bacteria, Archaea and protists in equatorial coastal waters

Singapore, an equatorial island in South East Asia, is influenced by a bi-annual reversal of wind directions which defines two monsoon seasons. We characterized the dynamics of the microbial communities of Singapore coastal waters by collecting monthly samples between February 2017 and July 2018 at...

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Bibliographic Details
Published in:Scientific reports 2019-11, Vol.9 (1), p.16390-13, Article 16390
Main Authors: Chénard, Caroline, Wijaya, Winona, Vaulot, Daniel, Lopes dos Santos, Adriana, Martin, Patrick, Kaur, Avneet, Lauro, Federico M.
Format: Article
Language:English
Subjects:
45/23
45/77
631/326/171/1878
631/326/2565/855
704/158/2452
Archaea
Archaea - genetics
Archaea - isolation & purification
Bacteria
Bacteria - classification
Bacteria - genetics
Bacteria - isolation & purification
Biodiversity
Coastal waters
Eukaryota - genetics
Eukaryota - isolation & purification
Flow cytometry
Humanities and Social Sciences
Life Sciences
Microbiota - genetics
Monsoons
multidisciplinary
Nitrogen
Plankton
Prokaryotes
rRNA
Science
Science (multidisciplinary)
Seasonal variations
Seasons
Seawater
Seawater - microbiology
Singapore
Spatio-Temporal Analysis
Taxonomy
Trophic status
Vegetal Biology
Wind
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Summary:Singapore, an equatorial island in South East Asia, is influenced by a bi-annual reversal of wind directions which defines two monsoon seasons. We characterized the dynamics of the microbial communities of Singapore coastal waters by collecting monthly samples between February 2017 and July 2018 at four sites located across two straits with different trophic status, and sequencing the V6-V8 region of the small sub-unit ribosomal RNA gene (rRNA gene) of Bacteria, Archaea, and Eukaryota. Johor Strait, which is subjected to wider environmental fluctuations from anthropogenic activities, presented a higher abundance of copiotrophic microbes, including Cellvibrionales and Rhodobacterales. The mesotrophic Singapore Strait, where the seasonal variability is caused by changes in the oceanographic conditions, harboured a higher proportion of typically marine microbe groups such as Synechococcales, Nitrosupumilales, SAR11, SAR86, Marine Group II Archaea and Radiolaria. In addition, we observed seasonal variability of the microbial communities in the Singapore Strait, which was possibly influenced by the alternating monsoon regime, while no seasonal pattern was detected in the Johor Strait.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-52648-x