Increasing hydrogen sulfide concentration and trace metal behavior in the anoxic Baltic waters

Dyrssen, David; Kremling, Klaus

doi:10.1016/0304-4203(90)90070-s

Cited by 127 publications

(63 citation statements)

References 15 publications

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“…Based on comparison of thermodynamic energy yields of redox couples, the presence of H 2 S in the water column implies that more energetically favorable terminal electron acceptors, including manganese, iron, and cobalt oxide minerals, would have already been reduced and their soluble products released into pore waters. While precipitation of these reduced metals as metal sulfides might occur, aqueous sulfide complexes can form, and reduced metal maxima are often observed at the H 2 S-O 2 interface, as has previously been observed in the anoxic Baltic Sea (Dyrssen and Kremling 1990). While reduced iron is sensitive to oxidative re-precipitation (Elrod et al 2004), reduced manganese is less sensitive and reduced cobalt has been observed to diffuse the farthest of the three toward or past the sediment-water interface before oxidative reprecipitation (Klinkhammer 1980;Heggie and Lewis 1984).…”

Section: Discussionmentioning

confidence: 54%

Basin‐scale inputs of cobalt, iron, and manganese from the Benguela‐Angola front to the South Atlantic Ocean

Noble

Lamborg

Ohnemus

et al. 2012

Limnology & Oceanography

147

193

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We present full-depth zonal sections of total dissolved cobalt, iron, manganese, and labile cobalt from the South Atlantic Ocean. A basin-scale plume from the African coast appeared to be a major source of dissolved metals to this region, with high cobalt concentrations in the oxygen minimum zone of the Angola Dome and extending 2500 km into the subtropical gyre. Metal concentrations were elevated along the coastal shelf, likely due to reductive dissolution and resuspension of particulate matter. Linear relationships between cobalt, N 2 O, and O 2 , as well as low surface aluminum supported a coastal rather than atmospheric cobalt source. Lateral advection coupled with upwelling, biological uptake, and remineralization delivered these metals to the basin, as evident in two zonal transects with distinct physical processes that exhibited different metal distributions. Scavenging rates within the coastal plume differed for the three metals; iron was removed fastest, manganese removal was 2.5 times slower, and cobalt scavenging could not be discerned from water mass mixing. Because scavenging, biological utilization, and export constantly deplete the oceanic inventories of these three hybrid-type metals, point sources of the scale observed here likely serve as vital drivers of their oceanic cycles. Manganese concentrations were elevated in surface waters across the basin, likely due to coupled redox processes acting to concentrate the dissolved species there. These observations of basin-scale hybrid metal plumes combined with the recent projections of expanding oxygen minimum zones suggest a potential mechanism for effects on ocean primary production and nitrogen fixation via increases in trace metal source inputs.

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Section: Discussionmentioning

confidence: 54%

Basin‐scale inputs of cobalt, iron, and manganese from the Benguela‐Angola front to the South Atlantic Ocean

Noble

Lamborg

Ohnemus

et al. 2012

Limnology & Oceanography

147

193

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“…Their investigations indicated that S. putrefaciens is likely to have played a major role in the reduction of manganese and iron. The occurrence of a similar situation of stepwise reduction of different electron acceptors after the spring bloom can be deduced from observations of Dyrssen & Kremling (1990) in the Gotland Deep in late spring 1981. Their data on dissolved iron and manganese in the water column may hint on a similar role of these elements as electron acceptors under conditions of high carbon supply as was reported from the Black Sea (Nealson et al 1991).…”

Section: Nitrous Oxide Production As Indicator For Denitrifying Bacteriamentioning

confidence: 89%

Nitrous oxide producing heterotrophic bacteria from the water column of the central Baltic: abundance and molecular identification

Brettar¹,

Höfle²

1993

Mar. Ecol. Prog. Ser.

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The water column of the Gotland Deep, a basin with anoxic deep water in the central Baltic, was investigated for its denitrifying microflora in comparison with various chemical, hydrographical and microbiological parameters including in situ denitrlfication rates. Abundance of denitrifying bacterla was determined by the MPN method using nutrient broth plus nitrate medium. As gas formation in inverted vials turned out to be a rather variable feature, N 2 0 production was used to detect the presence of denitnfying bacteria. Using 4 different cultivation approaches, 77 N 2 0 producing strains were Isolated from the whole water column. Isolates were analyzed for their denitrifying capacity to form NO2-, N 2 0 , and NZ. Taxonomic identification of the strains was done by high resolution electrophoresis of their low-molecular-weight (LMW) RNA (5s rRNA and tRNA). The bulk of the isolated N 2 0 producing strains (77 %) was identified by their LMW RNA pattern as Shewanella putrefaciens.All strains of this species produced N 2 0 , and NO2-and about one third showed N2-formation. S. putrefaciens is considered the most abundant culturable denitrifier of the low oxygen water and the oxicanoxic interface of the Gotland Deep.

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“…However, both Ehrlich et al, 2004 andArcher (2007) argued that their values were likely to be kinetic fractionations, CuS and ZnS being significantly less soluble than FeS m (Ksp FeS = 3.5, (Rickard, 2006); (Smith et al, 1976); Ksp sphalerite = 10.93, (Dyrssen and Kremling, 1990); where Ksp values given here are for free hexaqua species and the minerals).…”

Section: Comparison With Other Experimental Studiesmentioning

confidence: 99%

Experimental determination of the equilibrium Fe isotope fractionation between and FeSm (mackinawite) at 25 and 2°C

Guilbaud

Butler

Ellam

et al. 2011

Geochimica et Cosmochimica Acta

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Increasing hydrogen sulfide concentration and trace metal behavior in the anoxic Baltic waters

Cited by 127 publications

References 15 publications

Basin‐scale inputs of cobalt, iron, and manganese from the Benguela‐Angola front to the South Atlantic Ocean

Basin‐scale inputs of cobalt, iron, and manganese from the Benguela‐Angola front to the South Atlantic Ocean

Nitrous oxide producing heterotrophic bacteria from the water column of the central Baltic: abundance and molecular identification

Experimental determination of the equilibrium Fe isotope fractionation between and FeSm (mackinawite) at 25 and 2°C

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