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Microbial community development on model particles in the deep sulfidic waters of the Black Sea
Suominen, S.; Doorenspleet; Sinninghe Damsté, J.S; Villanueva, L. (2021). Microbial community development on model particles in the deep sulfidic waters of the Black Sea. Environ. Microbiol. 23(6): 2729-2746.
In: Environmental Microbiology. Blackwell Scientific Publishers: Oxford. ISSN 1462-2912; e-ISSN 1462-2920, meer
Peer reviewed article  

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  • Suominen, S.
  • Doorenspleet
  • Sinninghe Damsté, J.S, meer
  • Villanueva, L., meer

    Microorganisms attached to particles have been shown to be different from free‐living microbes and to display diverse metabolic activities. However, little is known about the ecotypes associated with particles and their substrate preference in anoxic marine waters. Here, we investigate the microbial community colonizing particles in the anoxic and sulfide‐rich waters of the Black Sea. We incubated beads coated with different substrates in situ at 1000 and 2000 m depth. After 6 h, the particle‐attached microbes were dominated by Gamma‐ and Alpha‐proteobacteria, and groups related to the phyla Latescibacteria, Bacteroidetes, Planctomycetes and Firmicutes, with substantial variation across the bead types, indicating that the attaching communities were selected by the substrate. Further laboratory incubations for 7 days suggested the presence of a community of highly specialized taxa. After incubation for 35 days, the microbial composition across all beads and depths was similar and primarily composed of putative sulfur cycling microbes. In addition to the major shared microbial groups, subdominant taxa on chitin and protein‐coated beads were detected pointing to specialized microbial degraders. These results highlight the role of particles as sites for attachment and biofilm formation, while the composition of organic matter defined a secondary part of the microbial community.

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