Differential bioaccumulation of heavy metals and organopollutants in the soft tissue and shell of the marine Gastropod, Austrocochlea constricta

Walsh, Ken; Dunstan, R. Hugh; Murdoch, R. N.

doi:10.1007/bf00213966

Cited by 48 publications

(30 citation statements)

References 17 publications

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“…From the literature, the bivalves shell has been proposed as a biomonitoring material by a few researchers. Walsh et al (1995) suggested that the shell of the gastropod, Austrocochlea constricta may act as a safe storage matrix for toxic contaminants (such as Cd, Ni and Pb in the present study) which is resistant to soft tissue detoxification mechanisms. The ability of the shell of the bivalve, Mya arenaria, to accumulate Pb was reported by Pitts and Wallace (1994).…”

Section: Discussionmentioning

confidence: 95%

Interspecific Variation of Heavy Metal Concentrations in the Different Parts of Tropical Intertidal Bivalves

Edward

Yap

Ismail

et al. 2008

Water Air Soil Pollut

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The concentrations of Cd, Cu, Fe, Ni, Pb and Zn in the different parts of six bivalves species were determined. From the study conducted, it was found that the byssus of Perna viridis, Scpharca broughtonii and Trisidos kiyonoi; the gill of Polymesoda erosa and Donax faba; and the foot of Gelonia expansa were highly accumulative of Cu. High levels of Cd were found in the gills of Scpharca broughtonii and the byssus of Trisidos kiyonoi; and also the shells of the four remaining bivalve species. As for Zn, the mantles of P. erosa and T. kiyonoi, and the gills of D. faba, G. expansa and S. broughtonii were highly accumulative of Zn. High level of Pb and Ni were found in the shells of all the species which indicated that the shells of the bivalves were highly accumulative of Pb and Ni. Elevated levels of Fe however were found in the different parts of the bivalve since Fe is an essential metal in metabolic activities and an abundant element in nature. The heavy metals in the total tissues and the different soft tissues of the bivalves were compared with the maximum permissible limits set by five different countries. From the comparison, it was found that most of the bivalves contained metal concentrations which were below the maximum permissible limits and should pose no toxicological risk to consumers.

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Section: Discussionmentioning

confidence: 95%

Interspecific Variation of Heavy Metal Concentrations in the Different Parts of Tropical Intertidal Bivalves

Edward

Yap

Ismail

et al. 2008

Water Air Soil Pollut

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“…The shell serves as a storage matrix for toxic metals (Walsh et al, 1995). However, the content of heavy metals in the shells of marine molluscs is usually less than in the soft tissues (Koide et al, 1992).…”

Section: Integumentmentioning

confidence: 98%

Cellular and subcellular distribution of metals in molluscs

Marigómez

Soto

Cajaraville

et al. 2002

Microscopy Res & Technique

423

202

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The cellular processes involved in metal metabolism in molluscs are reviewed, with emphasis on the contribution of microscopy (AMG, ARG, EPMA, and SIMS) to both basic research of metal cell biology and applied environmental research. In molluscs, metal uptake may occur by facilitated diffusion, active transport, or endocytosis, and can be enhanced by MT synthesis or formation of mineralized granules. In aquatic molluscs, gills constitute a key interface for dissolved metal uptake, where metals are bound to MT, incorporated into lysosomes, and released basally towards the blood plasma and circulating hemocytes. However, particulate metal uptake is mainly achieved via the digestive tract by endocytosis; further metals are transferred first to lysosomes and then to residual bodies, especially in the digestive cells of the digestive gland. Additionally, metals can be accumulated selectively in specific cell types. As ligands pools differ from cell to cell, different metals may be retained in different cell types. Class "a" metals are localized in cells with granules composed of carbonate, oxalate, phosphate, and sulfate (oxygen donors), whereas "b" metals are associated with those cell types rich in sulfur and nitrogen ligands (sulfur donors). In molluscs, oxygen donors occur in connective tissue calcium cells and basophilic cells, whereas sulfur donors are present in digestive cells, podocytes, nephrocytes, and rhogocytes. Hemocytes, which constitute the most relevant system for metal transport between tissues, move around the body and may penetrate tissues and remove metals from the inner medium to be accumulated in lysosomes as nondigested products. Rhogocytes also participate in metal mobilization, accumulation, and release. The assessment of metal levels in target cells of sentinel molluscs by microscopic techniques provides an early-warning measure, with promising applications as an exposure biomarker for environmental monitoring programs.

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“…In most cases, only tissues are used, as they respond faster to changes in the environment and tend to have higher metal concentrations than shells (Koide et al 1982, Walsh et al 1995. However, there is little information relating metal concentrations in the soft tissue to those in the shell of bivalves.…”

Section: Introductionmentioning

confidence: 99%

Linking the sediment geochemistry of an intertidal region to metal bioavailability in the deposit feeder Macoma balthica

Thomas¹,

Bendell-Young²

1998

Mar. Ecol. Prog. Ser.

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Surficial sediment and biota samples were collected from 26 locations in the intertidal region of the Fraser River estuary (British Columbia, Canada). Sediment samples were collected in May and July of 1995. Benthic samples of Macoma halthica, a deposit feeding bivalve, were collected from each site in July. Sedirnents were characterized by a sin~ultaneous extraction procedure that characterized the sediment matrix into oxides of manganese and iron (easily reducible Mn, ER Mn, and reducible Fe, RED Fe) and organic matter and separated the trace metals, cadmium, copper, lead, nickel and zinc among these 3 'biologically relevant' sediment components, i.e. metals associated with ER Mn, RED Fe and organic matter. Total mercury was also determined in each sediment sample. Bivalve samples were separated into shell and tlssue and analysed for the same metals. An RI MA); procedure was applied to determine if the concentration of trace metals in the shell and tissue of M. balthica was related to sediment geochemistry using sediment geochemistry and bivalve metal concentrations as the independent variable and dependent variable respectively. The partitioning of trace metals was dependent on the location-specific geochemistry (i.e. amounts of ER Mn, RED Fe and organic matter recovered at each location). This in turn led to differences in metal uptake by M, halthica that were related to sediment geochemistry. The relationships with tissues were highly significant (p I 0.001), except for mercury (p 5 0.05). Sediment geochemistry accounted for 31 % of the variability for cadmium, 39% for zinc, 51 % for copper and 54% for lead. Relationships were not as strong for shells; sediment geochem~stry explained 12 % of the variation for mercury, 15% for zinc, 21 for nickel and 43% for copper. Overall, metal levels in the tissue and shell of M. balthica were best related to the concentration of metal associated with the ER Mn component of sediment. The sediment geochemical matrix as defined by ER Mn, RED Fe and organic matter and the partitioning of trace metals among the 3 fractions was highly site-specific. This in turn led to site-specific patterns in metal bioavailability to M. balthica. The spatial heterogeneity that occurs within an estuary, on the scale of metres, must be considered when assessing the impact of metals on such regions.

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Differential bioaccumulation of heavy metals and organopollutants in the soft tissue and shell of the marine Gastropod, Austrocochlea constricta

Cited by 48 publications

References 17 publications

Interspecific Variation of Heavy Metal Concentrations in the Different Parts of Tropical Intertidal Bivalves

Interspecific Variation of Heavy Metal Concentrations in the Different Parts of Tropical Intertidal Bivalves

Cellular and subcellular distribution of metals in molluscs

Linking the sediment geochemistry of an intertidal region to metal bioavailability in the deposit feeder Macoma balthica

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