Speciation of Copper in Sewage Effluents and Its Toxicity to Daphnia Magna

Veen, Eleanor van; Burton, Nicola W.; Comber, Sean; Gardner, Michael

doi:10.1897/1551-5028(2002)021<0275:socise>2.0.co;2

Cited by 16 publications

(11 citation statements)

References 10 publications

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“…The element concentrations in the water from both lakes were within the typical range reported for natural, Andean lakes [18] and for various water bodies in central Chile [10,19]. The concentrations of the trace metals, which were of special interest in this study, were, in both lakes, in general below the toxicity level for freshwater microcrustaceans [20,21,22]. With the exception of Fe element concentrations in Rapel reservoir were slightly higher than for Lake Laja.…”

Section: Resultssupporting

confidence: 72%

Determination of trace elements in planktonic microcrustaceans using total reflection X-ray fluorescence (TXRF): First results from two Chilean lakes

Woelfl

Mages²,

Mercado

et al. 2004

Analytical and Bioanalytical Chemistry

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Section: Resultssupporting

confidence: 72%

Determination of trace elements in planktonic microcrustaceans using total reflection X-ray fluorescence (TXRF): First results from two Chilean lakes

Woelfl

Mages²,

Mercado

et al. 2004

Analytical and Bioanalytical Chemistry

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“…In freshwater environments, various phenomena of copper speciation have been described (Nomkoko et al, 2003;Van Veen et al, 2002). Moreover, the amount of bioavailable copper depends on many environmental parameters (Town et al, 2000).…”

Section: Modeling Freshwater Ecosystems and Copper Effectsmentioning

confidence: 99%

“…Moreover, the amount of bioavailable copper depends on many environmental parameters (Town et al, 2000). Among the various chemical forms toxic to freshwater organisms, it is widely acknowledged that copper toxicity is directly related to the concentration of free and bioavailable Cu 2+ in water (Nomkoko et al, 2003;Van Veen et al, 2002). Therefore, we focus on this form in our study, referring to its concentration as copper concentration in water.…”

Section: Modeling Freshwater Ecosystems and Copper Effectsmentioning

confidence: 99%

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Modeling the direct and indirect effects of copper on phytoplankton–zooplankton interactions

Prosnier

Loreau²,

Hulot³

2015

Aquatic Toxicology

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Predicting the effects of pollution at the community level is difficult because of the complex impacts of ecosystem dynamics and properties. To predict the effects of copper on a plant-herbivore interaction in a freshwater ecosystem, we built a model that focuses on the interaction between an alga, Scenedesmus sp., and a herbivore, Daphnia sp. The model assumes logistic growth for Scenedesmus and a type II functional response for Daphnia. Internal copper concentrations in Scenedesmus and Daphnia are calculated using a biodynamic model. We include two types of direct effects of copper on Scenedesmus and Daphnia that results from hormesis: a deficiency effect at low concentration and a toxic effect at high concentration. We perform a numerical analysis to predict the combined effects of copper and nutrient enrichment on the Scenedesmus-Daphnia interaction. Results show three types of outcomes depending on copper concentration. First, low (4 μg L(-1)) and high (50 μg L(-1)) copper concentrations cause deficiency and toxicity, respectively, leading to the extinction of all populations; for less extreme concentrations (between 4 and 5 μg L(-1) and between 16.5 and 50 μg L(-1)), only the consumer population becomes extinct. The two populations survive with intermediate concentrations. Second, when population dynamics present oscillations, copper has a stabilizing effect and reduces or suppresses oscillations. Third, copper, on account of its stabilizing effect, opposes the destabilizing effect of nutrient enrichment. Our model shows that (1) Daphnia is affected by copper at lower concentrations when community interactions are taken into account than when analyzed alone, and (2) counterintuitive effects may arise from the interaction between copper pollution and nutrient enrichment. Our model also suggests that single-value parameters such as NOEC and LOEC, which do not take community interactions into account to characterize pollutants effects, are unable to determine pollutant effects in complex ecosystems. More generally, our model underscores the importance of ecosystem-scale studies to predict the effects of pollutants.

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“…Van Veen et al (2002) found that when water high in suspended solids was used as the diluent in bioassays with D. magna, tolerance to copper was more than four times greater than when a diluent free of suspended solids was used. Dissolved organic carbon may also bind some contaminants and reduce overall bioavailability (Stackhouse and Benson, 1988;Stackhouse and Benson, 1989;Meador, 1990;Wood and Shelley, 1999).…”

Section: Introductionmentioning

confidence: 99%

The Effects of Temperature, Suspended Solids, and Organic Carbon on Copper Toxicity to Two Aquatic Invertebrates

Boeckman

Bidwell

2006

Water Air Soil Pollut

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Ephemeral wetlands are characterized by temporal changes in abiotic characteristics that could ameliorate or exacerbate contaminant effects on resident species. The goal of this study was to determine the effects of temperature and naturally occurring suspended solids and organic carbon on the response of Daphnia pulex, and the calanoid copepod, Diaptomus clavipes, to a copper reference toxicant. Organisms were exposed to copper at 10, 20 and 30 • C in 48-h static renewal tests with a diluent of either reconstituted laboratory water or water from a wetland that had elevated levels of both suspended solids and organic carbon. 48-h LC 50 values were calculated for both total and free ion copper concentrations. When wetland water was used as the diluent, LC 50 values based on total copper concentrations were significantly greater than free ion LC 50 s for both species. This difference was not as great in laboratory water, indicating that binding of the metal was greater in the wetland diluent and the free ion was largely responsible for toxicity. While D. clavipes was significantly less sensitive to the metal than D. pulex (48-h LC 50 for total copper in laboratory water at 20 • C 607.4 μg/L vs. 10.7 μg/L, respectively), the copepod exhibited a much greater response to increasing temperature. When the Biotic Ligand Model was used to generate free ion concentrations, it was found that measured concentrations exceeded the predicted values at each test condition; however measured LC 50 values for D. pulex were within a factor of two of the predicted LC 50 's at all temperatures and in both diluents.

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Speciation of Copper in Sewage Effluents and Its Toxicity to Daphnia Magna

Cited by 16 publications

References 10 publications

Determination of trace elements in planktonic microcrustaceans using total reflection X-ray fluorescence (TXRF): First results from two Chilean lakes

Determination of trace elements in planktonic microcrustaceans using total reflection X-ray fluorescence (TXRF): First results from two Chilean lakes

Modeling the direct and indirect effects of copper on phytoplankton–zooplankton interactions

The Effects of Temperature, Suspended Solids, and Organic Carbon on Copper Toxicity to Two Aquatic Invertebrates

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