Project Name Characterizing the distribution and rates of microbial sulfate reduction at Middle Valley hydrothermal vents 
URL http://lod.bco-dmo.org/id/project/626603
Project Groups (1)
Domain (0) Unknown
Investigators (2)
Institution N/A
Project Code 626603
Project Type


This project characterizes rates of microbially mediated sulfate reduction from three distinct hydrothermal vents in the Middle Valley vent field along the Juan de Fuca Ridge, as well as assessments of bacterial and archaeal diversity, estimates of total biomass and the abundance of functional genes related to sulfate reduction, and in situ geochemistry. Maximum rates of sulfate reduction occurred at 90°C in all three deposits. Pyrosequencing and functional gene abundance data reveal differences in both biomass and community composition among sites, including differences in the abundance of known sulfate reducing bacteria. The abundance of sequences for Thermodesulfovibro-like organisms and higher sulfate reduction rates at elevated temperatures, suggests that Thermodesulfovibro-like organisms may play a role in sulfate reduction in warmer environments. The rates of sulfate reduction observed suggest that - within anaerobic niches of hydrothermal deposits - heterotrophic sulfate reduction may be quite common and might contribute substantially to secondary productivity, underscoring the potential role of this process in both sulfur and carbon cycling at vents.

This project was funded, in part, by a C-DEBI Graduate Student Fellowship.


No assemblies.


Sample Name PI Desc Cart
Middle Valley Chimney Sulfate Reduction Rates NA Maximum rates of microbially mediated sulfate reduction from three distinct hydrothermal vents in the Middle Valley vent field along the Juan de Fuca Ridge. Samples were recovered from actively venting sulfide deposits at Needles (48.45778, -128.709), Dead Dog (48.45603,-128.71), and Chowder Hill (48.455543, -128.709) vents.

Analysis and write up of these data can be found at:
Frank, K.L., Rogers, D. R., Olins, H. C., Vidoudez, C., & Girguis, P. R. 2013. Characterizing the distribution and rates of microbial sulfate reduction at Middle Valley hydrothermal vents. The ISME journal, 7, 1391–1401. doi:10.1038/ismej.2013.17

Middle Valley Chimney 16S Sequencing Data NA Assessments of bacterial and archaeal diversity from three distinct hydrothermal vents in the Middle Valley vent field along the Juan de Fuca Ridge. Samples were recovered from actively venting sulfide deposits in the Middle Valley vent field along the Juan de Fuca Ridge at Needles (48.45778, -128.709), Dead Dog (48.45603,-128.71), and Chowder Hill (48.455543, -128.709) vents.

Analysis and write up of these data can be found at:
Frank, K.L., Rogers, D. R., Olins, H. C., Vidoudez, C., & Girguis, P. R. 2013. Characterizing the distribution and rates of microbial sulfate reduction at Middle Valley hydrothermal vents. The ISME journal, 7, 1391–1401. doi:10.1038/ismej.2013.17


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