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Microbial Eukaryotes Associated With Sediments in Deep-Sea Cold Seeps.

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Frontiers in Microbiology
|January 10, 2022
PubMed
Summary
This summary is machine-generated.

Deep-sea microbial eukaryotes, particularly SAR lineages, were studied in South China Sea cold seeps. Specialized parasitic/symbiotic taxa were prevalent, with distinct communities in seeps versus troughs.

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Area of Science:

  • Marine microbiology
  • Deep-sea ecology
  • Eukaryotic diversity

Background:

  • Microbial eukaryotes are crucial to marine food webs.
  • Their distribution in deep-sea chemosynthetic ecosystems remains poorly understood.
  • Cold seeps represent unique deep-sea environments.

Purpose of the Study:

  • To investigate the diversity, distribution, and relationships of microbial eukaryotes in South China Sea cold seeps.
  • To identify dominant eukaryotic groups and their ecological strategies.
  • To understand the biogeographic patterns of deep-sea microbial eukaryotes.

Main Methods:

  • High-throughput sequencing of the 18S rRNA gene.
  • Network analysis of microbial eukaryotic communities.
  • Sample collection from two cold seeps and one trough.

Main Results:

  • SAR (Stramenopiles, Alveolata, and Rhizaria) was the predominant group.
  • Prevalence of microbial eukaryotes with symbiotic and parasitic strategies.
  • Distinct eukaryotic communities in cold seeps compared to the trough.
  • Biogeographic patterns influenced by intermediate operational taxonomic units (OTUs).

Conclusions:

  • Specialized deep-sea microbial eukaryotic lineages exist in chemosynthetic cold seeps.
  • Parasitic/symbiotic taxa are prevalent in these communities.
  • Geographical proximity does not critically impact deep-sea microbial eukaryote distribution.
  • This study provides a foundation for understanding deep-sea eukaryotic ecological roles.