Organic Cu-complexation at the shallow marine hydrothermal vent fields off the coast of Milos (Greece), Dominica (Lesser Antilles) and the Bay of Plenty (New Zealand)

Kleint, Charlotte; Kuzmanovski, Stefan; Powell, Zach; Bühring, Solveig I; Sander, Sylvia G.; Koschinsky, Andrea

doi:10.1016/j.marchem.2014.10.012

Cited by 27 publications

(33 citation statements)

References 53 publications

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“…Cu speciation parameters (i.e. binding strength of the organic Cu-complexing ligands (log(K )), concentration of organic ligands ([L]) and concentration of bioavailable Cu ([Cu 0 ]; sum of the concentration of free hydrated Cu ions ([Cu 2þ ]) and the concentration of Cu weakly bound to inorganic ligands ([CuX IN ])) were determined using adsorptive cathodic stripping voltammetry (AdCSV) with salicylaldoxime as the complexing agent (Lucia et al 1994;Kleint et al 2015;Cotte et al 2018) at the University of Otago on a Metrohm 663 VA stand (Metrohm Autolab B.V., Utrecht, Netherlands). A description of the instrumental set-up is given in Zitoun et al (2018).…”

Section: Analysis Of Water Chemistrymentioning

confidence: 99%

“…A description of the instrumental set-up is given in Zitoun et al (2018). Samples underwent pretreatment to remove acid volatile sulfides from the sample solutions, which enabled the electrochemical measurement of Cu 0 in sulfide-rich vent samples (Sander et al 2007;Kleint et al 2015;Cotte et al 2018). For comparison purposes, sample aliquots were measured before the acid pretreatment as well as after the acid pretreatment with subsequent filtration (0.2 mm) of the samples to remove potential metal precipitates formed during the pretreatment (Sander et al 2007).…”

Section: Analysis Of Water Chemistrymentioning

confidence: 99%

“…For comparison purposes, sample aliquots were measured before the acid pretreatment as well as after the acid pretreatment with subsequent filtration (0.2 mm) of the samples to remove potential metal precipitates formed during the pretreatment (Sander et al 2007). For detailed information on removal of acid volatile sulfides, sample preparation and operating conditions of the instrument, see Sander et al (2007) and Kleint et al (2015). Samples were then analysed with the AdCSV method and every measurement was repeated three times.…”

Section: Analysis Of Water Chemistrymentioning

confidence: 99%

“…Total dissolved trace metals, Hg T and sulfide Elements are naturally present in seawater and are either enriched or impoverished in hydrothermal fluids relative to their background content in ambient seawater (e.g. German and Von Damm 2003;Tarasov 2006;Kleint et al 2015;Pichler et al 2019). The main processes affecting the concentration, speciation and bioavailability of elements in the water column around CO 2 vents are precipitation as sulfides, sediment resuspension, complexation with ligands and biological uptake (e.g.…”

Section: Overall Water Chemistry Physicochemical Parametersmentioning

confidence: 99%

“…Some trace metals, such as Mn, Fe, Co and Zn, are essential elements for the metabolism of organisms, whereas other metals, such as Cd, Pb and Hg, have no biological function and are entirely toxic to marine organisms, even at low concentrations (Rainbow 2002;Jakimska et al 2011;Tercier-Waeber et al 2012), or, in the case of Cu, are both essential and toxic depending on the concentration (Bruland et al 1991;Kleint et al 2015). Concentrations of Zn, Cu, Co, Cd, Pb and Ni around Whakaari were well below the Australian and New Zealand Environment and Conservation Council (2000) guidelines for a 95% level of protection for biota in saltwater systems, whereas the concentration of Hg T far exceeded the guideline threshold at all sites, including the open ocean control site C1 ,40 km away from White Island, by up to two orders of magnitude.…”

Section: Overall Water Chemistry Physicochemical Parametersmentioning

confidence: 99%

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A unique temperate rocky coastal hydrothermal vent system (Whakaari–White Island, Bay of Plenty, New Zealand): constraints for ocean acidification studies

Zitoun

Connell

Cornwall

et al. 2020

Mar. Freshwater Res.

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In situ effects of ocean acidification are increasingly studied at submarine CO2 vents. Here we present a preliminary investigation into the water chemistry and biology of cool temperate CO2 vents near Whakaari–White Island, New Zealand. Water samples were collected inside three vent shafts, within vents at a distance of 2m from the shaft and at control sites. Vent samples contained both seawater pH on the total scale (pHT) and carbonate saturation states that were severely reduced, creating conditions as predicted for beyond the year 2100. Vent samples showed lower salinities, higher temperatures and greater nutrient concentrations. Sulfide levels were elevated and mercury levels were at concentrations considered toxic at all vent and control sites, but stable organic and inorganic ligands were present, as deduced from Cu speciation data, potentially mediating harmful effects on local organisms. The biological investigations focused on phytoplankton, zooplankton and macroalgae. Interestingly, we found lower abundances but higher diversity of phytoplankton and zooplankton at sites in the direct vicinity of Whakaari. Follow-up studies will need a combination of methods and approaches to attribute observations to specific drivers. The Whakaari vents represent a unique ecosystem with considerable biogeochemical complexity, which, like many other vent systems globally, require care in their use as a model of ‘future oceans’.

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Section: Analysis Of Water Chemistrymentioning

confidence: 99%

Section: Analysis Of Water Chemistrymentioning

confidence: 99%

Section: Analysis Of Water Chemistrymentioning

confidence: 99%

Section: Overall Water Chemistry Physicochemical Parametersmentioning

confidence: 99%

Section: Overall Water Chemistry Physicochemical Parametersmentioning

confidence: 99%

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A unique temperate rocky coastal hydrothermal vent system (Whakaari–White Island, Bay of Plenty, New Zealand): constraints for ocean acidification studies

Zitoun

Connell

Cornwall

et al. 2020

Mar. Freshwater Res.

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Investigating the fate of copper in a laboratory‐based toxicity test with embryos of Mytilus galloprovincialis: Copper mass balance of a closed bioassay

Zitoun

Hassler²,

Clearwater

et al. 2019

Enviro Toxic and Chemistry

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The production of accurate and reliable data on metal toxicity during ecotoxicological bioassays is important for credible environmental risk assessments and management in aquatic environments. Actual measurements and reporting of contaminant concentrations in bioassays are, however, often disregarded; and potential contaminant loss attributable to adsorption processes (e.g., wall adsorption) in bioassays is widely omitted, which can have detrimental effects on calculated metal toxicity thresholds. In the present we assessed copper (Cu) mass balance during a standard 48‐h bioassay test with blue mussel (Mytilus galloprovincialis) embryos to evaluate effects on calculated toxicity endpoints. We demonstrated that measured Cu concentrations at the test conclusion need to be used to quantify the risk of Cu toxicity because nominal Cu and initial Cu concentrations underestimate overall Cu toxicity by up to 1.5‐fold, owing to Cu loss in solution attributable to adsorption and bioaccumulation processes. For the first time we provide evidence that extracellular adsorption to the biological surface of the embryos is the most important sink for total dissolved Cu in a bioassay. We also established that adsorbed extracellular Cu accumulation reduces Cu toxicity to embryos, potentially by inhibiting Cu from entering the cell of the mussel embryo. Environmental factors (e.g., salinity and dissolved organic carbon) did not influence the partitioning of Cu within the laboratory‐based bioassay. The present results 1) demonstrate the importance of differentiating extra‐ and intracellular Cu pools to improve our understanding of Cu toxicity and associated processes, 2) reveal the potential for bias with respect to calculated Cu toxicity thresholds when results are based on nominal and initial Cu concentrations, and 3) point out the need to follow current guidelines for the testing of chemicals to standardize toxicity tests and data reporting. Environ Toxicol Chem 2019;38:561–574. © 2019 SETAC

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The Export of Iron and Other Trace Metals from Hydrothermal Vents and the Impact on Their Marine Biogeochemical Cycle

Sander

Koschinsky

2016

The Handbook of Environmental Chemistry

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Organic Cu-complexation at the shallow marine hydrothermal vent fields off the coast of Milos (Greece), Dominica (Lesser Antilles) and the Bay of Plenty (New Zealand)

Cited by 27 publications

References 53 publications

A unique temperate rocky coastal hydrothermal vent system (Whakaari–White Island, Bay of Plenty, New Zealand): constraints for ocean acidification studies

A unique temperate rocky coastal hydrothermal vent system (Whakaari–White Island, Bay of Plenty, New Zealand): constraints for ocean acidification studies

Investigating the fate of copper in a laboratory‐based toxicity test with embryos of Mytilus galloprovincialis: Copper mass balance of a closed bioassay

The Export of Iron and Other Trace Metals from Hydrothermal Vents and the Impact on Their Marine Biogeochemical Cycle

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