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Quantifying long-term recurrence in planktonic microbial eukaryotes.

Caterina R Giner1, Vanessa Balagué1, Anders K Krabberød2

  • 1Department of Marine Biology and Oceanography, Institut de Ciències del Mar (ICM-CSIC), Barcelona, Spain.

Molecular Ecology
|November 10, 2018
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Summary
This summary is machine-generated.

Microbial communities show seasonal patterns, with some individual taxa and operational taxonomic units (OTUs) exhibiting predictable recurrence over a decade. This reveals that both recurrent and non-recurrent changes shape marine microbial dynamics.

Keywords:
community assemblydiversitymarine protistsrecurrenceseasonalitytemporal patterns

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Area of Science:

  • Marine microbiology
  • Ecology
  • Molecular biology

Background:

  • Temporal recurrence in microbial assemblages is poorly understood.
  • Seasonal changes are known for whole microbial communities, but not individual taxa.
  • Understanding microbial dynamics requires examining recurrence at multiple levels.

Purpose of the Study:

  • To investigate microbial recurrence at community, taxonomic group, and operational taxonomic unit (OTU) levels.
  • To quantify recurrence in specific taxa using a developed index.
  • To analyze long-term (10-year) microbial eukaryotic community data from a marine observatory.

Main Methods:

  • Utilized 18S rRNA gene sequencing data from picoplankton (0.2-3 µm) and nanoplankton (3-20 µm) size fractions.
  • Developed a novel index to quantify taxonomic recurrence.
  • Analyzed long-term data from a marine microbial observatory.

Main Results:

  • Microbial community structure exhibited a clear seasonal oscillation between winter and summer configurations over 10 years.
  • Specific taxonomic groups (e.g., Mamiellophyceae, MALV-III) showed distinct seasonality.
  • 13%-19% of OTUs, comprising approximately 40% of relative abundance, displayed recurrent dynamics.

Conclusions:

  • Long-term community dynamics are linked to the behavior of individual OTUs and taxonomic groups.
  • Both recurrent (seasonal) and non-recurrent changes are characteristic of microbial assemblage dynamics.
  • This study provides insights into the temporal recurrence patterns of marine microbial eukaryotes.