Publications

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  1. S. Roth, B. Poulin, Z. Baumann, X. Liu, L. Zhang, D. Krabbenhoft, M. E. Hines, J. K. Schaefer, T. Barkay. 2021. Nutrient inputs stimulate mercury methylation by syntrophs in a subarctic peatland. Frontiers of Microbiology. 12: 741523. https://doi.org/10.3389/fmicb.2021.741523
  2. J. L. Wilmoth, J. K. Schaefer, D. R. Schlesinger, S. Roth, P. G. Hatcher, J. K. Shoemaker, X. Zhang. 2021. The role of oxygen in stimulating methane production in wetlands. Global Change Biology. 27: 5831 - 5847. onlinelibrary.wiley.com/doi/full/10.1111/gcb.15831
  3. J. Goff, J. K. Schaefer, and N. Yee. 2021. Extracellular sulfite is protective against reactive oxygen species and antibiotic stress in Shewanella oneidensis MR-1. Environ. Microbiol. Rep. 13: 394-400, doi: 10.1111/1758-2229.12947.
  4. J. K. Schaefer, J. K., R. M. Kronberg, E. Björn, U. Skyllberg. 2020. Anaerobic guilds responsible for mercury methylation in boreal wetlands of varied trophic status serving as either a methylmercury source or sink. Environ. Microbiol.  doi.org/10.1111/1462-2920.15134 ​
  5. Y. Wang, S. E. Janssen, J. K. Schaefer, N. Yee, and J. R. Reinfelder. 2020. Tracing the uptake of Hg(II) in an iron-reducing bacterium using mercury stable isotopes. Environ. Sci. Technol. Lett. doi.org/10.1021/acs.estlett.0c00409.
  6. G. A. Adediran, V Liem-Nguyen, Y. Song, J. K. Schaefer, U. Skyllberg, E. Björn. Microbial biosynthesis of thiol compounds: implications for speciation, cellular uptake and methylation of Hg(II). Environ. Sci. Technol. In Press. doi.org/10.1021/acs.est.9b01502.
  7. B. A. Poulin, J. N. Ryan, M. T Tate, D. P. Krabbenhoft, M. E. Hines, T. Barkay, J. K. Schaefer, G. R. Aiken. 2019. Geochemical factors controlling dissolved elemental mercury and methylmercury formation in Alaskan wetlands of varying trophic status. Environ. Sci. Technol. 53:6203-6213, doi: 10.1021/acs.est.8b06041.
  8. J. Xu, M. Buck, K. Eklöf, O. Osman, J. K. Schaefer, K. Bishop, E. Björn, U. Skyllberg, S. Bertilsson, A. G. Bravo. 2019. Mercury methylating microbial communities of boreal forest soils. Sci. Reports. 9:518. doi: 10.1038/s41598-018-37383-z.
  9. Y. Wang, J. K. Schaefer, B. Mishra, and N. Yee. 2018. Adsoprtion of methylmercury onto Geobacter bemidjiensis Bem. Environ. Sci. Technol. 52(20):11564-11572. doi: 10.1021/acs.est.8b01987
  10. A. G. Bravo, S. Peura, M. Buck, O. Ahmed, A. Mateos-Rivera. S. Herrero Ortega, J. K. Schaefer, S. Bouchet, E. Björn, and S. Bertilsson. 2018. Methanogens and iron-reducing bacteria: the overlooked members of mercury methylating microbial communities in boreal lakes. Appl. Environ. Microbiol. 84: e01774-18.  doi: 10.1128/AEM.01774-18.
  11. R.-M. Kronberg, J. K. Schaefer, E. Björn, and U. Skyllberg. 2018. Mechanisms of methyl mercury net degradation in alder swamps: the role of methanogens and abiotic processes. Environ. Sci. Technol. Lett. 5(4): 220-225. doi:10.1021/acs.estlett.8b00081
  12. A. G. Bravo, J. Zopfi, M. Buck, J. Xu, S. Bertilsson, J. K. Schaefer, J. Poté, and C. Cosio. 2018. Geobacteraceae are important members of mercury-methylating microbial communities of sediments impacted by waste water releases. ISME J., doi:10.1038/s41396-017-0007-7
  13. S. Jonsson, A. Andersson, M. B. Nilsson, U. Skyllberg, E. Lundberg, J. K. Schaefer, S. Åkerblom, and E. Björn. 2017. Terrestrial discharges mediate trophic shifts and enhance methylmercury accumulation in estuarine biota. Sci. Adv. 3:e1601239. DOI: 10.1126/sciadv.1601239
  14.  Y. Wang, J. K. Schaefer, B. Mishra, and N. Yee. 2016. Intracellular Hg(0) oxidation in Desulfovibrio desulfuricans ND132. Environ. Sci. Technol. 50:11049-11056. DOI: 10.1021/acs.est.6b03299
  15. S. E. Janssen, J. K. Schaefer, J. D. Blum, T. Barkay, and J. R. Reinfelder. 2016. Fractionation of mercury stable isotopes during microbial methylmercury production in iron- and sulfate-reducing bacteria. Environ. Sci. Technol. 50:8077-8083. DOI: 10.1021/acs.est.6b00854
  16. J. K. Schaefer. 2016. Better living through mercury. News & Views. Nat. Geosciences. 9: 94-95.
  17. A. Szczuka, F. M. M. Morel, and J. K. Schaefer. 2015. The effect of thiols, zinc, and redox conditions on Hg uptake in Shewanella oneidensis. Environ. Sci. Technol. 49: 7432-7438. DOI: 10.1021/acs.est.5b00676
  18. J. K. Schaefer, A. Szczuka, and F. M. M. Morel. 2014. Effect of divalent metals on Hg(II) uptake and methylation by bacteria. Environ. Sci. Technol. 48: 3007-3013. DOI: 10.1021/es405215v
  19. J. K. Schaefer, R.-M. Kronberg, F. M. M. Morel, U. Skyllberg. 2014. Detection of a key Hg methylation gene, hgcA, in wetland soil. Environ. Microbiol. Rep. 6: 441-447. DOI: 10.1111/1758-2229.12136
  20. J. K. Schaefer, S. S. Rocks, W. Zheng, L. Liang, B. Gu, and F. M. M. Morel. 2011. Active transport, substrate specificity, and methylation of Hg(II) in anaerobic bacteria. Proc. Nat. Acad. Sci. 108: 8714-8719. DOI:  10.1073/pnas.1105781108
  21. E. G. Malcolm, J. K. Schaefer, E. B. Ekstrom, C. B. Tuit, A. Jayakumar, H. Park, B. B. Ward, and F. M. M. Morel. 2010. Mercury methylation in oxygen deficient zones of the oceans: no evidence for the predominance of anaerobes. Mar. Chem. 122: 11-19. DOI: 10.1016/j.marchem.2010.08.004
  22. J. K. Schaefer, and F. M. M. Morel. 2009. High methylation rates of mercury bound to cysteine by Geobacter sulfurreducens. Nature Geosci. 2: 123-126. DOI: 10.1038/ngeo412
  23. T. Cardona-Marek, J. K. Schaefer, K. Ellickson, T. Barkay, J. R. Reinfelder. 2007. Mercury speciation, reactivity, and bioavailability in a highly contaminated estuary, Berry’s Creek, New Jersey Meadowlands. Environ. Sci. Technol. 41: 8268-8274. DOI: 10.1021/es070945h
  24. S. M. Ní Chadhain*, J. K. Schaefer*, S. Hicks, G. J. Zylstra, and T. Barkay. 2006. Analysis of mercuric reductase (merA) gene diversity in an anaerobic mercury-contaminated sediment enrichment. Environ. Microbiol. 8: 1746-1752. DOI: 10.1111/j.1462-2920.2006.01114.x
  25. J. K. Schaefer, J. Yagi, J. Reinfelder, T. Cardona, K. M. Ellickson, S. Tel-Or, T. Barkay. 2004. The role of the bacterial organomercury lyase (MerB) in controlling methylmercury accumulation in mercury contaminated natural waters. Environ. Sci. Technol. 38: 4304-4311. DOI: 10.1021/es049895w
  26. J. K. Schaefer, J. Letowski, and T. Barkay. 2002. mer-mediated resistance and volatilization of Hg(II) under anaerobic conditions. Geomicrobiol. J. 19: 87-102.
  27.  J. K. Schaefer, K. D. Goodwin, I. R. McDonald, J. C. Murrell, R. S. Oremland. 2002. Leisingera methylohalidivorans, gen. nov., sp. nov., a marine methylotroph that grows on methyl bromide. Int. J. Syst. Evol. Microbiol. 52: 851-859. DOI: 10.1099/ijs.0.01960-0
  28. T. Barkay and J. Schaefer. 2001. Metal and radionucleotide bioremediation: issues, considerations and potentials. Curr. Opin. Microbiol. 4: 318 – 323.
  29. R. S. Oremland, P. R. Dowdle, S. Hoeft, J. P. Sharp, J. K. Schaefer, L. G. Miller, J. S. Blum, R. L. Smith, N. S. Bloom, D. Wallschlaeger. 2000. Bacterial Dissimilatory Reduction of Arsenate and Sulfate in Meromictic Mono Lake, California. Geochimica et Cosmochimica Acta 64: 3073-3084.
  30. J. K. Schaefer and R. S. Oremland. 1999. Oxidation of methyl halides by the facultative methylotroph Strain IMB-1. Appl. Environ. Microbiol. 65: 5035-5041.
  31. K. D. Goodwin, J. K. Schaefer, and R. S. Oremland. 1998. Bacterial oxidation of dibromomethane and methyl bromide in natural waters and enrichment cultures. Appl. Environ. Microbiol. 64: 4629-4636.
  32. A. Laverman, J. S. Blum, J. K. Schaefer, E. J. Philips, D. R. Lovley, and R. S. Oremland. 1995. Growth of Strain SES-3 with arsenate and other diverse electron acceptors. Appl. Environ. Microbiol. 61: 3556-3561.