Weight and salinity effects on zinc uptake and accumulation for the American oyster (Crassostrea virginica Gmelin)

Mo, Cheol; Neilson, Bruce J.

doi:10.1016/0269-7491(93)90116-6

Cited by 22 publications

(6 citation statements)

References 19 publications

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“…Because Zn is an essential trace element, it is more easily accumulated and stored in soft tissues by bivalves than nonessential heavy metals (e.g., Pb and Cd) on chronic exposure to contaminated water and sediments [2,[40][41][42]. Our data are consistent with the finding that accumulation of Zn occurs primarily in bivalve soft tissues, where it is usually associated with proteins or membrane-bound vesicles in the hemolymph [43,44].…”

Section: Field Exposures To Heavy Metalssupporting

confidence: 92%

DNA strand breakage in freshwater mussels (Anodonta grandis) exposed to lead in the laboratory and field

Black

Ferrell

Horning

et al. 1996

Enviro Toxic and Chemistry

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Abstract-The sensitivity of a freshwater mussel, Anodonta grandis, to DNA damage following lead (Pb) exposure was tested in laboratory and field experiments. Laboratory exposures were conducted for 4 weeks at the following Pb concentrations: 0 (controls), 50, 500, and 5000 g/L. Mussels were also collected from a strip-mine pond contaminated with trace amounts of lead, cadmium (Cd), and zinc (Zn). Significant DNA strand breakage was observed in foot tissue from mussels exposed in the laboratory to the lowest Pb concentration (50 g/L). No evidence of strand breakage was observed in any of the analyzed tissues from the mussels exposed to higher Pb concentrations (500 and 5000 g/L) or from the chronically exposed mussels collected from the strip-mine pond. These data suggest a threshold effect for DNA damage and repair resulting from low-level Pb exposure, whereby repair of DNA strand breaks may occur only if a certain body burden or exposure duration has been achieved.

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Section: Field Exposures To Heavy Metalssupporting

confidence: 92%

DNA strand breakage in freshwater mussels (Anodonta grandis) exposed to lead in the laboratory and field

Black

Ferrell

Horning

et al. 1996

Enviro Toxic and Chemistry

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“…Notably, the lower salinity upstream may have increased the free ions available for biological uptake by the organisms. Numerous studies have shown that metal uptake by invertebrates increases at a lowered salinity [29][30][31], although the geochemical and physiological mechanisms underlying the salinity influences may vary. Another possible factor is an interaction among the metals, which could affect their accumulation.…”

Section: C Dmentioning

confidence: 99%

Copper and zinc contamination in oysters: Subcellular distribution and detoxification

Wang

Yang

Guo

et al. 2011

Environmental Toxicology and Chemistry

129

104

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Metal pollution levels in estuarine and coastal environments have been widely reported, but few documented reports exist of severe contamination in specific environments. Here, we report on a metal-contaminated estuary in Fujian Province, China, in which blue oysters (Crassostrea hongkongensis) and green oysters (Crassostrea angulata) were discovered to be contaminated with Cu and other metals. Extraordinarily high metal concentrations were found in the oysters collected from the estuary. Comparison with historical data suggests that the estuary has recently been contaminated with Cr, Cu, Ni, and Zn. Metal concentrations in blue oysters were as high as 1.4 and 2.4% of whole-body tissue dry wt for Cu and Zn, respectively. Cellular debris was the main subcellular fraction binding the metals, but metal-rich granules were important for Cr, Ni, and Pb. With increasing Cu accumulation, its partitioning into the cytosolic proteins decreased. In contrast, metallothionein-like proteins increased their importance in binding with Zn as tissue concentrations of Zn increased. In the most severely contaminated oysters, only a negligible fraction of their Cu and Zn was bound with the metal-sensitive fraction, which may explain the survival of oysters in such contaminated environments.

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“…The dependence of the metal concentrations on the oyster d.w. (size effect) was tested in order to correct the influence of this parameter 27,31 . This test was performed via double-log regression 31,[36][37][38] : y a b x log log l og 10 10 10 = + , where, y is the metal (µg. g −1 ), x is the dry weight (g), a is the intercept, and b is the regression coefficient.…”

Section: Discussionmentioning

confidence: 99%

Heavy metals bioconcentration in Crassostrea rhizophorae: A site-to-site transplant experiment at the Potengi estuary, Rio Grande do Norte, Brazil

Mello

Crapez

Silva

et al. 2020

Sci Rep

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in this study, we analyzed the bioconcentration of cd, cr, cu, pb, ni, and Zn in the soft tissue of transplanted oysters in two sites in the potengi estuary for six months. native oysters collected before and after the transplantation experiment provided the background for statistical analyses. cd, cr, and ni showed a strong inverse correlation with oyster weight in both sites. transplantation upstream of the estuary presented increasing concentrations of Zn, cu, and pb and condition index (ci) and decreasing trends for Cd and Ni, whereas Cr oscillated significantly. In the downstream transplantation, cu, pb, and Zn and the ci tended to decrease, whereas for ni, cd, and cr, the concentrations increased. Spatiotemporal principal component analysis correlated these results mainly with proximity to the polluting source, seasonality, and previous exposure to heavy metals. these results helped interpret the responses provided by these biomonitors to environmental changes, whether they are natural or anthropogenic.Industrialization and urbanization are primary sources of heavy-metal contamination in estuaries and coastal ecosystems of tropical and subtropical countries (e.g., Brazil) 1,2 . Deforestation of estuarine margins also impairs the ability of the environment to withstand heavy-metal pollution, as mangrove forests are an important agent in the process of cycling organic matter and nutrients, acting as a "filter" by retaining and detoxifying harmful elements and substances 3-5 . It is a fact that metal pollution in aquatic systems will significantly increase in the future owing to the popularity of new technologies, such as nanotechnology, and the improper disposal of the so-called e-waste 6 .Metals widely available in estuarine environments tend to be trapped in sediments and incorporated into the local food chain. Thus, the presence of heavy metals in sediments can induce toxic effects in living organisms when they exceed certain concentration limits 5 . These limits, according to Farrington et al. 2 , are dependent on the half-life of the metal itself (or the metallic compound) and its nature (whether essential or nonessential) and on the tolerance of the organism to the environment it is exposed to. Once discarded in an estuarine system, heavy metals can undergo various processes, such as dissolution, precipitation, adsorption, and complexation (with organic and inorganic dissolved ligands and particulate matter), and become deposited in bottom sediments 7 . These processes can create a potential source of pollution and adversely affect the environmental quality 8,9 . Certain marine organisms, such as barnacles and bivalve mollusks, can metabolically accumulate large amounts of these metals in their tissues, having efficient strategies to tolerate toxicity and reduce damage in such a way that they can be employed in multipurpose environmental monitoring and several levels of environmental degradation, thus signifying the extent of pollution present in the adjacent water column 10,11 .Bioaccumulation of he...

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Weight and salinity effects on zinc uptake and accumulation for the American oyster (Crassostrea virginica Gmelin)

Cited by 22 publications

References 19 publications

DNA strand breakage in freshwater mussels (Anodonta grandis) exposed to lead in the laboratory and field

DNA strand breakage in freshwater mussels (Anodonta grandis) exposed to lead in the laboratory and field

Copper and zinc contamination in oysters: Subcellular distribution and detoxification

Heavy metals bioconcentration in Crassostrea rhizophorae: A site-to-site transplant experiment at the Potengi estuary, Rio Grande do Norte, Brazil

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