Sulfur bacteria promote dissolution of authigenic carbonates at marine methane seeps

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Persistent link to this item

https://doi.org/10.13020/4j4t-e569
https://hdl.handle.net/11299/218173

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Keywords

carbonate

iTag

amplicon

microbiome

sulfur

Collection period

2018-10-15
2018-10-15

Date completed

2021-01-26

Date updated

Time period coverage

Geographic coverage

Source information

Journal Title

Journal ISSN

Volume Title

Title

Sulfur bacteria promote dissolution of authigenic carbonates at marine methane seeps

Published Date

2021-01-27

Authors

Leprich, Dalton J.

Flood, Beverly E.

Schroedl, Peter R.

Ricci, Elizabeth

Marlow, Jeffery J.

Girguis, Peter R.

Bailey, Jake V.

Group

University of Minnesota Bailey Geobiology Lab

Author Contact

Flood, Beverly E.
beflood@umn.edu

Type

Dataset
Genomics Data

Abstract

Carbonate rocks at marine methane seeps are commonly colonized by sulfur-oxidizing bacteria that co-occur with etch pits that suggest active dissolution. We show that sulfur-oxidizing bacteria are abundant on the surface of an exemplar seep carbonate collected from Del Mar East Methane Seep Field, USA. We then used bioreactors containing aragonite mineral coupons that simulate certain seep conditions to investigate plausible in situ rates of carbonate dissolution associated with sulfur-oxidizing bacteria. Bioreactors inoculated with a sulfur-oxidizing bacterial strain, Celeribacter baekdonensis LH4, growing on aragonite coupons induced dissolution rates in sulfidic, heterotrophic, and abiotic conditions of 1773.97 (±324.35), 152.81 (±123.27), and 272.99 (±249.96) Mol CaCO3  cm-2  yr-1, respectively. Steep gradients in pH were also measured within carbonate-attached biofilms using pH-sensitive fluorophores. Together, these results show that the production of acidic microenvironments in biofilms of sulfur-oxidizing bacteria are capable of dissolving carbonate rocks, even under well-buffered marine conditions. Our results support the hypothesis that authigenic carbonate rock dissolution driven by lithotrophic sulfur-oxidation constitutes a previously unknown carbon flux from the rock reservoir to the ocean and atmosphere.

Description

Assembled 16S rRNA gene iTag libraries of the microbial communities attached to a methane seep carbonate rock on the top surfaces vs. the bottom surface (in contact with sediments) subsampled 3 times.

Referenced by

Leprich, D. J., Flood, B. E., Schroedl, P. R., Ricci, E., Marlow, J. J., Girguis, P. R., & Bailey, J. V. (2021). Sulfur bacteria promote dissolution of authigenic carbonates at marine methane seeps. The ISME Journal, 1-14.
https://doi.org/10.1038/s41396-021-00903-3

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License

CC0 1.0 Universal
http://creativecommons.org/publicdomain/zero/1.0/

Publisher

Collections

Data Repository for U of M (DRUM)

Funding information

NASA Exobiology (NNX-14AK20G)
NSF (OCE-0826254)
NASA (80NSSC18K1140)
NSF (1542506)

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Previously Published Citation

Suggested citation

Leprich, Dalton J.; Flood, Beverly E.; Schroedl, Peter R.; Ricci, Elizabeth; Marlow, Jeffery J.; Girguis, Peter R.; Bailey, Jake V.. (2021). Sulfur bacteria promote dissolution of authigenic carbonates at marine methane seeps. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/4j4t-e569.

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