Niche differentiation among mat-forming, sulfide-oxidizing bacteria in chemosynthetic ecosystems of the Nile Deep Sea Fan (Eastern Mediterranean Sea), supplement to: Grünke, Stefanie; Felden, Janine; Lichtschlag, Anna; Girnth, Anne-Christin; de Beer, Dirk; Wenzhöfer, Frank; Boetius, Antje (2011): Niche differentiation among mat-forming, sulfide-oxidizing bacteria at cold seeps of the Nile Deep Sea Fan (Eastern Mediterranean Sea). Geobiology, 9(4), 330-348

DOI

Sulfidic muds of cold seeps on the Nile Deep Sea Fan are populated by different types of mat-forming sulfide-oxidizing bacteria. The predominant sulfide oxidizers of three different mats were identified by microscopic and phylogenetic analyses as (i) Arcobacter species producing cotton-ball-like sulfur precipitates, (ii) large filamentous sulfur bacteria including Beggiatoa species, or (iii) single, spherical cells resembling Thiomargarita species. High resolution in situ microprofiles revealed different geochemical settings selecting for different mat types. Arcobacter mats occurred where oxygen and sulfide overlapped at the bottom water interface. Filamentous sulfide oxidizers were associated with non-overlapping, steep gradients of oxygen and sulfide. A dense population of Thiomargarita was favored by temporarily changing supplies of oxygen and sulfide. These results indicate that the decisive factors in selecting for different mat-forming bacteria within one deep-sea province are spatial or temporal variations in energy supply. Furthermore, the occurrence of Arcobacter spp.-related 16S rRNA genes in the sediments below all three types of mats, as well as on top of brine lakes of the Nile Deep Sea Fan, indicates that this group of sulfide oxidizers can switch between different life modes depending on the geobiochemical habitat setting.

Identifier
DOI https://doi.org/10.1594/PANGAEA.810017
Related Identifier https://doi.org/10.1111/j.1472-4669.2011.00281.x
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.810017
Provenance
Creator Grünke, Stefanie; Felden, Janine; Lichtschlag, Anna; Girnth, Anne-Christin; de Beer, Dirk; Wenzhöfer, Frank; Boetius, Antje
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2011
Funding Reference Sixth Framework Programme; Seventh Framework Programme
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Representation
Language English
Resource Type Supplementary Collection of Datasets
Format application/zip
Size 14 datasets
Discipline Earth System Research
Spatial Coverage (30.352W, 32.368S, 31.711E, 32.535N)
Temporal Coverage Begin 2006-10-25T00:47:00Z
Temporal Coverage End 2006-11-19T17:20:00Z