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Article

Siboglinidae Tubes as an Additional Niche for Microbial Communities in the Gulf of Cádiz—A Microscopical Appraisal

1
Institute of Microbiology and Genetics, Georg-August-University Göttingen, 37077 Göttingen, Germany
2
Göttingen Centre of Geosciences, Georg-August-University Göttingen, 37077 Göttingen, Germany
3
Marine Geology Dv., Geological Survey of Spain, IGME, 28003 Madrid, Spain
4
Estrutura de Missão para a Extensão da Plataforma Continental (EMEPC), 2770-047 Paço de Arcos, Portugal
5
Area 52 Research Group, School of Biology and Environmental Science/Earth Institute, University College Dublin, Dublin 4, Ireland
6
Göttingen Academy of Sciences and Humanities, 37073 Göttingen, Germany
*
Author to whom correspondence should be addressed.
Microorganisms 2020, 8(3), 367; https://doi.org/10.3390/microorganisms8030367
Received: 19 December 2019 / Revised: 24 February 2020 / Accepted: 29 February 2020 / Published: 5 March 2020
Siboglinids were sampled from four mud volcanoes in the Gulf of Cádiz (El Cid MV, Bonjardim MV, Al Gacel MV, and Anastasya MV). These invertebrates are characteristic to cold seeps and are known to host chemosynthetic endosymbionts in a dedicated trophosome organ. However, little is known about their tube as a potential niche for other microorganisms. Analyses by scanning and transmission electron microscopy showed dense biofilms on the tube in Al Gacel MV and Anastasya MV specimens by prokaryotic cells. Methanotrophic bacteria were the most abundant forming these biofilms as further supported by 16S rRNA sequence analysis. Furthermore, elemental analyses with electron microscopy and energy-dispersive X-ray spectroscopy point to the mineralization and silicification of the tube, most likely induced by the microbial metabolisms. Bacterial and archaeal 16S rRNA sequence libraries revealed abundant microorganisms related to these siboglinid specimens and certain variations in microbial communities among samples. Thus, the tube remarkably increases the microbial biomass related to the worms and provides an additional microbial niche in deep-sea ecosystems. View Full-Text
Keywords: Siboglinidae; cold seeps; chemosynthesis; TEM; SEM; biomineralization Siboglinidae; cold seeps; chemosynthesis; TEM; SEM; biomineralization
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MDPI and ACS Style

Rincón-Tomás, B.; González, F.J.; Somoza, L.; Sauter, K.; Madureira, P.; Medialdea, T.; Carlsson, J.; Reitner, J.; Hoppert, M. Siboglinidae Tubes as an Additional Niche for Microbial Communities in the Gulf of Cádiz—A Microscopical Appraisal. Microorganisms 2020, 8, 367. https://doi.org/10.3390/microorganisms8030367

AMA Style

Rincón-Tomás B, González FJ, Somoza L, Sauter K, Madureira P, Medialdea T, Carlsson J, Reitner J, Hoppert M. Siboglinidae Tubes as an Additional Niche for Microbial Communities in the Gulf of Cádiz—A Microscopical Appraisal. Microorganisms. 2020; 8(3):367. https://doi.org/10.3390/microorganisms8030367

Chicago/Turabian Style

Rincón-Tomás, Blanca, Francisco J. González, Luis Somoza, Kathrin Sauter, Pedro Madureira, Teresa Medialdea, Jens Carlsson, Joachim Reitner, and Michael Hoppert. 2020. "Siboglinidae Tubes as an Additional Niche for Microbial Communities in the Gulf of Cádiz—A Microscopical Appraisal" Microorganisms 8, no. 3: 367. https://doi.org/10.3390/microorganisms8030367

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