Cadmium, cobalt, copper, iron, lead, nickel and zinc in Indian Ocean water

Danielsson, Lars-Göran

doi:10.1016/0304-4203(80)90010-9

Cited by 91 publications

(24 citation statements)

References 15 publications

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“…In oceanic oxygen minimum zones, where about a third of marine denitrification takes place (Codispoti et al 2001), total concentrations of copper are low, 0.5-2.0 nM (Danielsson 1980;Saagar et al 1992;Boyle et al 1977;De Baar et al 1985). While these values are higher than dissolved iron in iron-limited areas of the oceans, most copper is organically complexed in the water column (Coale and Bruland, 1990;Moffett and Dupont, 2007 (Theberge et al 1997) implying that most of the copper may be tightly bound in the form of inert sulfide complexes.…”

Section: Introductionmentioning

confidence: 99%

Organic carbon, and not copper, controls denitrification in oxygen minimum zones of the ocean

Ward

Tuit

Jayakumar

et al. 2008

Deep Sea Research Part I: Oceanographic Research Papers

122

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Section: Introductionmentioning

confidence: 99%

Organic carbon, and not copper, controls denitrification in oxygen minimum zones of the ocean

Ward

Tuit

Jayakumar

et al. 2008

Deep Sea Research Part I: Oceanographic Research Papers

122

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“…Existing copper profiles from the Arabian Sea (Danielsson 1980;Saagar et al 1992) and the eastern tropical North Pacific (Boyle et al 1977;De Baar et al 1985), where denitrification is extensive, show surface enrichments in dissolved copper underlain by relatively copper-deplete waters from 250 to 1,000 m depth. These depths are coincident with the O 2 minimum where copper concentrations are as low as 0.5 nmol L Ϫ1 .…”

mentioning

confidence: 99%

Accumulation of nitrogen oxides in copper‐limited cultures of denitrifying bacteria

Granger

Ward

2003

Limnology & Oceanography

133

118

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Abstract-Three strains of heterotrophic denitrifying bacteria were cultured in artificial seawater medium under trace metal clean conditions to investigate their physiological response to changes in copper concentration. Decreasing the copper concentration in cultures of Pseudomonas stutzeri and Paracoccus denitrificans resulted in accumulation of nitrous oxide (N 2 O) gas compared to copper-replete cultures and cessation of growth before complete denitrification to dinitrogen. Correspondingly, the activity of the copper enzyme nitrous oxide reductase, measured for P. denitrificans cultures, was high in copper-replete cultures and was below detection in copper-deficient cultures. Addition of copper to copper-deficient cultures following the accumulation of N 2 O resulted in resumption of growth and complete consumption of N 2 O in solution. Growth of the third strain, WLB20, in copper-deficient medium caused a marked accumulation of nitrite, suggesting that WLB20 has the copper form of nitrite reductase. These observations suggest a role for trace metals in regulating redox cycling of nitrogen and trace gas production in the ocean.

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“…In addition, some work was done in the Arctic Ocean (Moore, 1981(Moore, , 1983Danielsson and Westerlund, 1983;Mart et al, 1983;Yeats, 1988). Until recently only one data set existed for the Indian Ocean (Danielsson, 1980). In the Southern or Antarctic Ocean proper, very few data have been available (Orren and Monteiro, 1985;Bordinetal., 1987).…”

Section: Introductionmentioning

confidence: 99%

Cadmium, copper and iron in the Scotia Sea, Weddell Sea and Weddell/Scotia Confluence (Antarctica)

et al. 1991

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219Nolting, R.F., De Baal', H.J.W., Van Bennekom, A.J. and Masson, A., 1991. Cadmium, copper and iron in the Scotia Sea, Weddell Sea and Weddell/Scotia Confluence (Antarctica). Mal '. Chem., 35: 219-243.Until recently, little was known about trace metals in the Southern Ocean. Vertical profiles and surface water sections along 49°W exhibit Cd concentrations of 0.2-0.8 nM, increasing with depth, as for phosphate. A linear relationship between Cd and phosphate exists as in other oceans; however, the Cd/P slope at about 0.63-0.65 nM ,uM-' is much higher than the generally assumed global deep water ratio of about 0.35-0.4 nM 11M-I . Dissolved Cu levels range from I to 4 nM, increasing with depth, as for silicate. The linear relationship between Cu and silicate shows the same linear trend as in the North Atlantic Ocean, except for the shallow (less than 100 m) Antarctic waters. The South Orkneys shelf appears to be a source of dissolved Cu. Dissolved Fe levels range from 2 to 8 nM in the surface waters. Deep water Fe levels are similar. Over the South Orkneys shelf dissolved Fe is an order of magnitude higher (about 60 nM). Shelfsediments appear to be a major source for Fe; transport of weathered material by ice(bergs) may also contribute Fe to seawater.

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Cadmium, cobalt, copper, iron, lead, nickel and zinc in Indian Ocean water

Cited by 91 publications

References 15 publications

Organic carbon, and not copper, controls denitrification in oxygen minimum zones of the ocean

Organic carbon, and not copper, controls denitrification in oxygen minimum zones of the ocean

Accumulation of nitrogen oxides in copper‐limited cultures of denitrifying bacteria

Cadmium, copper and iron in the Scotia Sea, Weddell Sea and Weddell/Scotia Confluence (Antarctica)

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