2022
DOI: 10.1016/j.apgeochem.2022.105463
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Mercury, organic matter, iron, and sulfur co-cycling in a ferruginous meromictic lake

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Cited by 11 publications
(3 citation statements)
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“…This disagrees with earlier studies where persistently high sulfide concentrations were believed to inhibit Hg methylation in the AOL of the Black Sea ( 24 ) and other systems ( 50 , 51 ). Similar to our results, maximal methylation activity was also reported under sulfidic conditions in stratified brackish water ( 19 ) and a meromictic lake ( 52 ). The dual role of sulfide in Hg methylation is complex and still uncertain ( 51 , 53 ).…”
Section: Discussionsupporting
confidence: 91%
“…This disagrees with earlier studies where persistently high sulfide concentrations were believed to inhibit Hg methylation in the AOL of the Black Sea ( 24 ) and other systems ( 50 , 51 ). Similar to our results, maximal methylation activity was also reported under sulfidic conditions in stratified brackish water ( 19 ) and a meromictic lake ( 52 ). The dual role of sulfide in Hg methylation is complex and still uncertain ( 51 , 53 ).…”
Section: Discussionsupporting
confidence: 91%
“…Our results show that like other similar lakes, the availability of oxygen across the water column and shallow sediments of Lac Pavin can be linked to changes in both microbial community composition and the metabolic capacities of its members. This oxygen gradient, alongside gradients of dissolved organic/inorganic carbon, sulfur, and iron, which also vary substantially with depth [66][67][68][69], likely play an important role in determining distributions of key bacterial and archaeal lineages in this ecosystem. Here, we provide high-quality genomic data for many of these lineages, including abundant members of the Actinobacteria, which dominate in the shallow water column of Pavin and other similar lakes [70,71].…”
Section: Discussionmentioning
confidence: 99%
“…Some systems do not exhibit a relation to TOC and Hg may instead be adsorbed onto (fine-grained) detrital minerals and detected by a correlation between Hg and mineral dominating elements such as aluminium (Al), titanium (Ti), zirconium (Zr), rubidium (Rb), or potassium (K) (Sanei et al, 2012;Sial et al, 2013;. In few cases, sulphide minerals may act as important Hg hosts (Benoit et al, 1999;Han et al, 2008), however this is less common in freshwater lacustrine systems where sulphate-reduction is often limited and only a small fraction of non-organic sulfur is buried (Ding et al, 2016;Holmer and Storkholm, 2001;Tisserand et al, 2022;Watanabe et al, 2004).…”
Section: Sedimentary Mercury Recordsmentioning
confidence: 99%