Modeling of cadmium bioaccumulation in two populations of the green mussel <i>Perna viridis</i>

Ng, Tim; Wang, Wen‐Xiong

doi:10.1897/04-616r.1

Cited by 28 publications

(13 citation statements)

References 39 publications

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“…The ingestion rate is the combination of the CR and seston concentration. The measured total dissolved metal concentrations were 0.063 and 0.57 μg l -1 for Cd and Zn, respectively, which were within the range of available data recorded in Hong Kong coastal waters (Ng & Wang 2005). Because of the lack of field measurements of Cd and Zn concentrations in the food particles, we used Kd values for each metal to calculate the metal concentration in seston.…”

supporting

confidence: 62%

Allometry of cadmium and zinc concentrations and bioaccumulation in the scallop Chlamys nobilis

Pan¹,

Wang²

2008

Mar. Ecol. Prog. Ser.

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Scallops (Bivalvia: Pectinidae) contain very high concentrations of cadmium (Cd) and zinc (Zn) in their body tissues. We investigated the allometry of Cd and Zn concentrations in the scallop Chlamys nobilis and the underlying biokinetic mechanisms. The metal influx rate from the dissolved phase and the weight-specific clearance rate decreased with body size, whereas the dietary assimilation efficiency (AE) increased with increasing body size. The dietary AEs of metals in the scallops were comparable when measured by the mass balance and the dual radiotracer techniques. The efflux rate of Cd in the scallops was lower than those in other bivalves, whereas the efflux of Zn was comparable to those in other bivalves. Growth dilution appeared to be important in the overall metal accumulation in the scallops. The allometric dependencies of the biokinetic parameters were then combined with the measurements of metal concentrations in the water to predict the likely metal concentrations in scallops of different sizes using the biokinetic model. The modeling suggested that the very high AE and low efflux rate for Cd explained the high Cd concentrations in the scallops. Dietary uptake dominated the overall metal accumulation in the scallops. Both the predicted metal concentrations and the allometric coefficients of metals were comparable to the measured values. This study shows, for the first time, that the biokinetic model can be used to predict the effects of body size on the bioaccumulation of metals in marine invertebrates. The allometry of ingestion rate, compared to other biokinetic parameters, is mainly responsible for the allometry of metal bioaccumulation in the scallops. KEY WORDS: Cadmium · Zinc · Scallops · Biokinetic model · Allometry Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 365: [115][116][117][118][119][120][121][122][123][124][125][126] 2008 Neff (2002) concluded that the arithmetic mean concentrations of Cd in scallops were the highest among different species of bivalves (clams, mussels, oysters, and scallops).The concentrations of zinc (Zn) in scallops are also high, especially in the kidney. Bustamante & Miramand (2005) reported a range of 313 to 1062 μg g -1 dry weight Zn in the soft tissues of Chlamys varia, whereas the concentrations of Zn in their kidneys were as high as 38 000 μg g -1. Such concentrations of Zn are probably among the highest recorded among any marine organisms thus far. Although it is safe to consume adductor muscle, which is low in trace metals (Metian et al. 2007a), the increasing inputs of industrial, agricultural, and domestic wastes in coastal waters can accelerate the bioaccumulation of metals in scallops, which may subsequently pose health risks to humans due to the consumption of scallops. Furthermore, scallops have been used as sentinel organisms in environmental monitoring (Cranford et al. 2006). Interpretation of the biomonitoring data often requires a clear understanding of the mechanisms of pollutant ac...

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confidence: 62%

Allometry of cadmium and zinc concentrations and bioaccumulation in the scallop Chlamys nobilis

Pan¹,

Wang²

2008

Mar. Ecol. Prog. Ser.

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“…Solid lines indicate regression for MRG; dash-dotted lines indicate regression for HSP; dashed lines indicate regression for ORG; and dotted lines indicate regression for HDP. et al, 2005a;Bustamante et al, 2002;Ng and Wang, 2005). The population-specific Cd partitioning may thus imply that the sequestration into insoluble granules is more efficient in detoxifying Cd than metal-binding proteins, allowing aquatic organisms living in metal-polluted habitats to tolerate an elevated concentration of Cd in the environment.…”

Section: Intracellular Partitioning Of Cadmium (Cd)mentioning

confidence: 99%

Metal intracellular partitioning as a detoxification mechanism for mummichogs (Fundulus heteroclitus) living in metal-polluted salt marshes

Goto

Wallace

2010

Marine Environmental Research

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Intracellular partitioning of trace metals is critical to metal detoxification in aquatic organisms. In the present study, we assessed metal (Cd, Cu, Pb, and Zn) handling capacities of mummichogs (Fundulus heteroclitus) in metal-polluted salt marshes in New York, USA by examining metal intracellular partitioning. Despite the lack of differences in the whole body burdens, partitioning patterns of metals in intracellular components (heat-stable proteins, heat-denaturable proteins, organelles, and metal-rich granules) revealed clear differential metal handling capacities among the populations of mummichogs. In general, mummichogs living in metal-polluted sites stored a large amount of metals in detoxifying cellular components, particularly metal-rich granules (MRG). Moreover, only metals associated with MRG were consistently correlated with variations in the whole body burdens. These findings suggest that metal detoxification through intracellular partitioning, particularly the sequestration to MRG, may have important implications for metal tolerance of mummichogs living in chronically metal-polluted habitats.

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“…Overall, the biokinetic model with experimentally determined biokinetic parameters is shown to adequately predict metal concentrations in marine clams (Se [63]), copepods (Cd, Zn, Ag, Co, and Se [30]) and mussels (Cd [64]) collected in the field. Therefore, the biokinetic model can account for most of the important factors governing metal accumulation in aquatic invertebrates in the environment [5].…”

Section: Biokinetics Of Metalsmentioning

confidence: 99%

Biokinetics and tolerance development of toxic metals in Daphnia magna

Tsui

Wang

2007

Enviro Toxic and Chemistry

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Abstract-Daphnia magna is widespread in many freshwater systems of temperate regions and frequently is used to test metal toxicity. Recently, studies have been performed to determine metal biokinetics and development of tolerance in this important zooplankton species. In the present paper, we review the recent progress in these areas and suggest possible directions for future studies. Substantial differences exist in aqueous uptake, dietary assimilation, and elimination of several metals (Cd, Se, Zn, Ag, Hg, and MeHg) by D. magna. The routes of uptake are metal-specific, with Se and MeHg being accumulated predominantly through diet. All metals except Ag can be biomagnified from algae to D. magna, providing that metal concentrations in algae and algal food density are relatively low. Methylmercury is biomagnified in all situations. As a route for metal elimination in D. magna, maternal transfer is especially important for Se, Zn, and MeHg. On the other hand, the effect of single-generation exposure to metals on D. magna is very different from multigeneration exposure, which often results in a significantly higher metal tolerance. Moreover, D. magna easily loses metal tolerance developed through long-term exposure. Recovery from metal stress can temporarily increase the sensitivity of D. magna to metal toxicity. Finally, metallothionein-like protein is responsible for minimizing metal toxicity in D. magna. The results inferred from these studies can be extrapolated to other aquatic invertebrates as well as to other pollutants in the aquatic environment.

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Modeling of cadmium bioaccumulation in two populations of the green mussel Perna viridis

Cited by 28 publications

References 39 publications

Allometry of cadmium and zinc concentrations and bioaccumulation in the scallop Chlamys nobilis

Allometry of cadmium and zinc concentrations and bioaccumulation in the scallop Chlamys nobilis

Metal intracellular partitioning as a detoxification mechanism for mummichogs (Fundulus heteroclitus) living in metal-polluted salt marshes

Biokinetics and tolerance development of toxic metals in Daphnia magna

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