Articles | Volume 19, issue 6
Research article
24 Mar 2022
Research article |  | 24 Mar 2022

Aqueous system-level processes and prokaryote assemblages in the ferruginous and sulfate-rich bottom waters of a post-mining lake

Daniel A. Petrash, Ingrid M. Steenbergen, Astolfo Valero, Travis B. Meador, Tomáš Pačes, and Christophe Thomazo

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Manuscript not accepted for further review
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Cited articles

Angly, F. E., Dennis, P. G., Skarshewski, A., Vanwonterghem, I., Hugenholtz, P., and Tyson, G. W.: CopyRighter: a rapid tool for improving the accuracy of microbial community profiles through lineage-specic gene copy number correction, Microbiome, 2, 1–13, 2014. 
Antler, G., Turchyn, A. V., Rennie, V., Herut, B., and Sivan, O.: Coupled sulfur and oxygen isotope insight into bacterial sulfate reduction in the natural environment, Geochim. Cosmochim. Ac., 118, 98–117, 2013. 
Antler, G., Mills, J. V., Hutchings, A. M., Redeker, K. R., and Turchyn, A. V.: The sedimentary carbon-sulfur-iron interplay – a lesson from East Anglian salt marsh sediments, Front. Earth Sci., 7, 140,, 2019. 
Bachan, A. and Kump, L. R.: The rise of oxygen and siderite oxidation during the Lomagundi event, P. Natl. Acad. Sci. USA, 112, 6562–6567, 2015. 
Balci, N., Shanks, W. C., Mayer, B., and Mandernack, K. W.: Oxygen and sulfur isotope systematics of sulfate produced by bacterial and abiotic oxidation of pyrite, Geochim. Cosmochim. Ac., 71, 3796–3811, 2007. 
Short summary
We spectroscopically evaluated the gradients of dissolved C, N, S, Fe and Mn in a newly formed redox-stratified lake. The lake features an intermediate redox state between nitrogenous and euxinic conditions that encompasses vigorous open sulfur cycling fuelled by the reducible Fe and Mn stocks of the anoxic sediments. This results in substantial bottom water loads of dissolved iron and sulfate. Observations made in this ecosystem have relevance for deep-time paleoceanographic reconstructions.
Final-revised paper