Marine anoxia initiates giant sulfur-oxidizing bacterial mat proliferation and associated changes in benthic nitrogen, sulfur, and iron cycling in the Santa Barbara Basin, California Borderland

Yousavich, David J.; Robinson, De'Marcus; Peng, Xuefeng; Krause, Sebastian J. E.; Wenzhöfer, Frank; Janssen, Felix; Liu, Na; Tarn, Jonathan; Kinnaman, Franklin; Valentine, David L.; Treude, Tina

doi:https://doi.org/10.5194/bg-21-789-2024

Articles | Volume 21, issue 3

https://doi.org/10.5194/bg-21-789-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Low-oxygen environments and deoxygenation in open and coastal...

https://doi.org/10.5194/bg-21-789-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 3

Research article

|

14 Feb 2024

Research article |

| 14 Feb 2024

Marine anoxia initiates giant sulfur-oxidizing bacterial mat proliferation and associated changes in benthic nitrogen, sulfur, and iron cycling in the Santa Barbara Basin, California Borderland

David J. Yousavich, De'Marcus Robinson, Xuefeng Peng, Sebastian J. E. Krause, Frank Wenzhöfer, Felix Janssen, Na Liu, Jonathan Tarn, Franklin Kinnaman, David L. Valentine, and Tina Treude

Supplement

https://doi.org/10.5194/bg-21-789-2024-supplement

Data sets

Porewater geochemistry of sediments collected Fall 2019 in the Santa Barbara Basin using ROV Jason during R/V Atlantis cruise AT42-19 (Version 1) T. Treude and D. L. Valentine https://doi.org/10.26008/1912/BCO-DMO.867007.1

Porosity and density of sediments collected Fall 2019 in the Santa Barbara Basin using ROV Jason during R/V Atlantis cruise AT42-19 (Version 1) T. Treude and D. L. Valentine https://doi.org/10.26008/1912/bco-dmo.867113.1

Microbial activity from sediments collected Fall 2019 in the Santa Barbara Basin using ROV Jason during R/V Atlantis cruise AT42-19 (Version 1) T. Treude and D. L. Valentine https://doi.org/10.26008/1912/bco-dmo.867221.1

Benthic fluxes of solutes measured by in-situ benthic flux chambers along two depth transects in the Santa Barbara Basin during November 219 (Version 1) T. Treude and D. L. Valentine https://doi.org/10.26008/1912/bco-dmo.896706.1

Short summary

Declining oxygen (O₂) concentrations in coastal oceans can threaten people’s ways of life and food supplies. Here, we investigate how mats of bacteria that proliferate on the seafloor of the Santa Barbara Basin sustain and potentially worsen these O₂depletion events through their unique chemoautotrophic metabolism. Our study shows how changes in seafloor microbiology and geochemistry brought on by declining O₂ concentrations can help these mats grow as well as how that growth affects the basin.