Proc. IODP, 331, Data report: microbial activity determined by microcalorimetry and cultivation of bacteria from hydrothermally influenced subsurface marine sediments in the mid-Okinawa Trough (IODP Expedition 331)

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Chapter contents Abstract Introduction Materials and methods Results and conclusions Thermophiles Aerobic litho(hetero)trophs Aerobe and anaerobe heterotrophic mesophiles Acknowledgments References Tables T1. Total and chemical activity. T2. Mean total and chemical activity. T3. Overview of enrichment cultures and isolates. PDF file			Previous \| Next doi:10.2204/iodp.proc.331.203.2016 Data report: microbial activity determined by microcalorimetry and cultivation of bacteria from hydrothermally influenced subsurface marine sediments in the mid-Okinawa Trough (IODP Expedition 331)¹ Axel Schippers,² Anja Breuker,² and Marco Blöthe² Abstract Using sediment samples from five Integrated Ocean Drilling Program Expedition 331 sites, bacteria were cultivated on different media, and microbial activity was measured by isothermal microcalorimetry at 25° and at 90°C to study hydrothermal influence. The data showed considerable activity of thermophilic microorganisms at 90°C, but at 25°C significant activity could only be detected for aerobic conditions. Enhanced microbial activity at 90°C was mirrored by the enrichment of thermophilic sulfate reducers in agreement with published geochemical data. Aerobic and anaerobic cultures we obtained from hydrothermally influenced, deeply buried marine sediments at 12°C were not significantly different from those of other cold and temperate deeply buried marine sediments. ¹ Schippers, A., Breuker, A., and Blöthe, M., 2016. Data report: microbial activity determined by microcalorimetry and cultivation of bacteria from hydrothermally influenced subsurface marine sediments in the mid-Okinawa Trough (IODP Expedition 331). In Takai, K., Mottl, M.J., Nielsen, S.H., and the Expedition 331 Scientists, Proceedings of the Integrated Ocean Drilling Program, 331: Tokyo (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.331.203.2016 ² Federal Institute for Geosciences and Natural Resources (BGR), Stilleweg 2, 30655 Hannover, Germany. Correspondence author: axel.schippers@bgr.de Initial receipt: 20 November 2015 Acceptance: 26 August 2016 Publication: 4 October 2016 MS 331-203 Top of page \| Previous \| Next