Oyster Saccostrea cucullata as a Biomonitor for Hg Contamination and the Risk to Humans on the Coast of Qeshm Island, Persian Gulf, Iran

Shirneshan, Golshan; Bakhtiari, Alireza Riyahi; Kazemi, Aliyeh; Mohamadi, Mohsen; Kheirabadi, Nabiallah

doi:10.1007/s00128-012-0607-x

Cited by 9 publications

(4 citation statements)

References 19 publications

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“…The influence of turbidity is best attributed to the resuspension of muddy sediments due to the shallow nature of the estuary. This has implications for the bioavailability of metals to estuarine macrobenthic fauna (Shirneshan et al 2012). The spatial distribution and relatively high concentrations of Cr suggest that its input may have been influenced by factors other than sediment characteristics, although the source of the high levels of Cr at sites 2 and 3 is not clear and requires further investigation.…”

Section: Discussionmentioning

confidence: 99%

Trace metal contamination in sediment in the Mhlathuze Estuary, northern KwaZulu-Natal, South Africa: effects on the macrobenthic community

Izegaegbe

Vivier

Mzimela

2020

Environ Monit Assess

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Mhlathuze Estuary constitutes one of the ecological most important estuaries in southern Africa and is regarded as an estuary of high conservation importance. The ongoing expansion of the adjacent industrialized Richards Bay Harbour increases the risk of metal pollution to the estuary. This study provides insight into the extent and sources of trace metal contamination using pollution indices and sediment quality guidelines and the effect on macrobenthic habitat quality. Sediment samples for sediment metal and macrobenthic analysis were collected quarterly during 2016-2017 at five sites in the estuary using a marine-grade Zabalocki grab. Metal concentrations were determined using an ICP-OES. Sediment metal concentrations were consistently highest in the subtidal mudflats and lowest in marine sand at the mouth of the estuary. Concentrations of all metals displayed significant differences between sites (P < 0.05). Pollution indices indicated moderate enrichment of Cr at all sites, although the mean pollution load index showed the estuary to be unpolluted. Comparison with sediment quality guidelines revealed that concentrations of Ni and Cr were potentially toxic to biota. Using multivariate analysis, metal concentrations appeared not to significantly affect the macrobenthic community. The multi-metric biotic index M-AMBI proved to be a robust tool in the habitat quality assessment of the estuary. The continuing use of M-AMBI as a biomonitoring tool for ecological management of the estuary is advocated.

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Section: Discussionmentioning

confidence: 99%

Trace metal contamination in sediment in the Mhlathuze Estuary, northern KwaZulu-Natal, South Africa: effects on the macrobenthic community

Izegaegbe

Vivier

Mzimela

2020

Environ Monit Assess

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“…It is well known that bivalves as filter feeding animals are able to concentrate heavy metals in their tissue; therefore they can be used for monitoring heavy metal pollution of the environment. Many authors use bivalve tissues for monitoring marine ecosystem health (Yarsan et al 2007;Olivares-Rieumont et al 2012;Shirneshan et al 2012).…”

Section: Methodsmentioning

confidence: 99%

Concentration of Mercury in Cockles (Anadara granosa and A. antiquata) Harvested from Estuaries of Western Lombok, Indonesia, and Potential Risks to Human Health

Rahayu

Irawan

Soegianto

2015

Bull Environ Contam Toxicol

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This study measured the levels of total mercury (tHg) in the whole tissues of cockles (Anadara granosa and A. antiquata) harvested from three estuaries of Western Lombok Island (WLI), Indonesia. This paper also evaluated the hazard level posed by the mercury in relation to the maximum residual limit for human consumption and to estimate the weekly intake and compare it with the provisional tolerable weekly intake (PTWI). The tHg concentrations in A. granosa ranged from 0.020 to 0.070 mg kg(-1), and those in A. antiquata were between 0.032 and 0.077 mg kg(-1) at all locations. All samples of cockles harvested from WLI contain tHg below the permissible limit for human consumption. The maximum weekly intakes for total mercury by coastal people range from 0.28 to 1.08 µg kg(-1) b.w., and they are below the recommended values of PTWI (5.6 µg kg(-1) b.w.). If it is assumed that 100% of the Hg in cockles is methyl mercury (MeHg), consumption of the indicated amounts at the measured values wouldn't exceed the MeHg PTWI (1.6 µg kg(-1) b.w.).

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“…Another proposed bioindicator for Hg contamination and the risk to humans is the oyster Saccostrea cucullata. Results obtained in this organism, related to the toxicity induced by Hg, report that the soft tissues of oysters could be a good indicator of Hg in the aquatic system [20]. A proteomic approach for identifying gonad differential proteins was performed in the oyster (Crassostrea angulata) following food-chain contamination with HgCl.…”

Section: Mercurymentioning

confidence: 99%

Marine Invertebrates as Bioindicators of Heavy Metal Pollution

Chiarelli¹,

Roccheri²

2014

OJMetal

126

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Atmosphere, earth and water compose the environment. The presence of heavy metals in the environment has grown because of their large employment in some industrial and agricultural activities. Although these metals are terrestrial products, they flow into the sea through effluents and sewage or are directly discharged from industries placed on the seawater front. It should be considered that metals concentrations vary widely according to different seawater latitudes and depths and can be strongly influenced by fresh water discharges from heavily polluted rivers. In this review recent studies on heavy metal pollution in marine ecosystems and their organisms will be presented. Metal speciation, bioaccumulation in biota, as well as abiotic and biotic factors affecting their bioavailability will be reviewed. Moreover, the use of bioindicator organisms for the biomonitoring of heavy metal toxicity and their ecological effects will be defined. Many marine invertebrate species fulfill the following criteria: Sensitivity to a wide range of chemicals (especially to heavy metals), cost-effectiveness for repeatable tests, readily interpretable biological consequences of pollution. Among the most important marine invertebrates used as bioindicators, the sea urchin embryo is one of the most suitable, especially to assess metal/heavy metal pollution.

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Oyster Saccostrea cucullata as a Biomonitor for Hg Contamination and the Risk to Humans on the Coast of Qeshm Island, Persian Gulf, Iran

Cited by 9 publications

References 19 publications

Trace metal contamination in sediment in the Mhlathuze Estuary, northern KwaZulu-Natal, South Africa: effects on the macrobenthic community

Trace metal contamination in sediment in the Mhlathuze Estuary, northern KwaZulu-Natal, South Africa: effects on the macrobenthic community

Concentration of Mercury in Cockles (Anadara granosa and A. antiquata) Harvested from Estuaries of Western Lombok, Indonesia, and Potential Risks to Human Health

Marine Invertebrates as Bioindicators of Heavy Metal Pollution

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