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A Quantitative Relationship that Demonstrates Mercury Methylation Rates in Marine Sediments Are Based on the Community Composition and Activity of Sulfate-Reducing Bacteria
Abstract
A quantitative framework was developed which estimates mercury methylation rates (MMR) in sediment cores based on measured sulfate reduction rates (SRR) and the community composition sulfate-reducing bacterial consortia. MMR and SRR as well as group-specific 16S rRNA concentrations (as quantified by probe signal) associated with sulfate-reducing bacteria (SRB) were measured in triplicate cores of saltmarsh sediments. Utilizing previously documented conversion factors in conjunction with field observations of sulfate reduction, MMR were calculated, and the results were compared to experimentally derived measurements of MMR. Using our novel field data collected in saltmarsh sediment where sulfate reduction activity is high, calculated and independently measured MMR results were consistently within an order of magnitude and displayed similar trends with sediment depth. In an estuarine sediment where sulfate reduction activity was low, calculated and observed MMR diverged by greater than an order of magnitude, but again trends with depth were similar. We have expanded the small database generated to date on mercury methylation in sulfur-rich marine sediments. The quantitative frameworkwe have developed further elucidates the coupling of mercury methylation to sulfate reduction by basing calculated rates of mercury methylation on the activity and community composition of sulfate-reducing bacteria. The quantitative framework may also provide a promising alternative to the difficult and hazardous determination of MMR using radiolabeled mercury.
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Citations
Cites
Sulfate stimulation of mercury methylation in freshwater sediments
Gilmour, C. C., Henry, E. A., & Mitchell, R. (1992) · Environmental Science & Technology · doi:10.1021/es00035a029 · Cited by 1,124
Cited by
Methanogens: Principal Methylators of Mercury in Lake Periphyton
Hamelin, S., Amyot, M., Barkay, T., Wang, Y., & Planas, D. (2011) · Environmental Science & Technology · doi:10.1021/es2010072 · Cited by 308
Geochemistry of Mercury in the Environment
Fitzgerald, W. F., & Lamborg, C. H. (2014) · Treatise on Geochemistry · doi:10.1016/b978-0-08-095975-7.00904-9 · Cited by 275
Marvin-DiPasquale, M., Lutz, M. A., Brigham, M. E., Krabbenhoft, D. P., Aiken, G. R., Orem, W. H., & Hall, B. D. (2009) · Environmental Science & Technology · doi:10.1021/es802698v · Cited by 162
Metadata
- Authors
- King, J. K., Kostka, J. E., Frischer, M. E., Saunders, F. M., & Jahnke, R. A.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2001-05-05
- Volume
- 35
- Issue
- 12
- Pages
- 2491-2496
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2012433113
- Cited by
- 201
- References
- 1
- FWCI
- 5.18
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: A Quantitative Relationship that Demonstrates Mercury Methylation Rates in Marine Sediments Are Based on the Community Composition and Activity of Sulfate-Reducing Bacteria. https://app.cochat.ai/papers/10.1021/es001813q
- The paper
- King, J. K., Kostka, J. E., Frischer, M. E., Saunders, F. M., & Jahnke, R. A. (2001). A Quantitative Relationship that Demonstrates Mercury Methylation Rates in Marine Sediments Are Based on the Community Composition and Activity of Sulfate-Reducing Bacteria. Environmental Science & Technology. https://doi.org/10.1021/es001813q
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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