Mercury contamination in invertebrate biota in a temperate coastal lagoon (Ria de Aveiro, Portugal)

Coelho, J.P.; Policarpo, E.; Pardal, Miguel Ângelo; Millward, G.E.; Pereira, Eduarda; Duarte, Armando C.

doi:10.1016/j.marpolbul.2006.11.020

Cited by 17 publications

(21 citation statements)

References 19 publications

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“…This study showed that total mercury concentrations in S. plana and H. diversicolor correlate well with total mercury levels in sediments, which is in accordance with other works (Coelho et al, 2007;Žižek et al, 2007). On the other hand, the bivalve S. plana Table 1 Physico-chemical characterization of the sediments and mercury content of S. plana and H. diversicolor in the field conditions for the three sampling sites.…”

Section: Discussionsupporting

confidence: 90%

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Different mercury bioaccumulation kinetics by two macrobenthic species: The bivalve Scrobicularia plana and the polychaete Hediste diversicolor

Cardoso

Lillebø

Pereira

et al. 2009

Marine Environmental Research

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Section: Discussionsupporting

confidence: 90%

“…In the case of S. plana, this bivalve exceeded the maximum mercury levels allowed for human consumption (0.5 lg g À1 wet weight, Regulation EC 466/ 2001). This species reached higher mercury concentrations than the polychaete H. diversicolor, which may be due in part to its longer life span (Coelho et al, 2007) (Table 1).…”

Section: Mercury Bioaccumulation Ratesmentioning

confidence: 99%

Different mercury bioaccumulation kinetics by two macrobenthic species: The bivalve Scrobicularia plana and the polychaete Hediste diversicolor

Cardoso

Lillebø

Pereira

et al. 2009

Marine Environmental Research

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“…Total tissue Hg concentrations in T. tubifex were comparable with values reported for benthic invertebrates inhabiting reference and Hg-contaminated field sites and may be considered environmentally realistic (Coelho et al 2007;Rizzo et al 2011). Genetic resistance to inorganic Hg has been reported for this species, which may be related to detoxification and storage (by way of metallothionein-like proteins or metal-rich granules) or to accumulation and subsequent loss of metal through autotomy of caudal segments (Klerks and Bartholomew 1990;Horne 2003a, 2003b).…”

Section: Discussionsupporting

confidence: 71%

Assimilation of Elements and Digestion in Grass Shrimp Pre-Exposed to Dietary Mercury

Seebaugh

Wallace

Lamoreaux

et al. 2012

Arch Environ Contam Toxicol

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Grass shrimp Palaemonetes pugio were fed mercury (Hg)-contaminated oligochaetes for 15 days and analyzed for Hg, cadmium (Cd), and carbon assimilation efficiencies (AE) as well as toxicological end points related to digestion. Disproportionate increases in stable Hg concentrations in shrimp did not appear to be related to partitioning to trophically available Hg in worms. Hg AE by pre-exposed shrimp reached a plateau (approximately 53 %), whereas Cd AE varied (approximately 40-60 %) in a manner that was not dose-dependent. Carbon AE did not differ among treatments (approximately 69 %). Gut residence time was not impacted significantly by Hg pre-exposure (grand median approximately 465 min), however, there was a trend between curves showing percentages of individuals with markers in feces over time versus treatment. Feces-elimination rate did not vary with dietary pre-exposure. Extracellular protease activity varied approximately 1.9-fold but did not exhibit dose-dependency. pH increased over the range of Hg pre-exposures within the anterior (pH approximately 5.33-6.51) and posterior (pH approximately 5.29-6.25) regions of the cardiac proventriculus and Hg assimilation exhibited a negative relationship to hydrogen ion concentrations. The results of this study indicate that previous Hg ingestion can elicit post-assimilatory impacts on grass shrimp digestive physiology, which may, in turn, influence Hg assimilation during subsequent digestive cycles.

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“…Methylmercury is more toxic, bioavailable and prone to bioaccumulation and biomagnification in estuarine food webs, ultimately finding its way to species usually consumed by humans (Wang et al, 1998;Clarkson et al, 2003;Tchounwou et al, 2003). Despite methylmercury typically being below 1% of total mercury in sediments, levels in fish are commonly above 90%, due to a higher biomagnification of the organic form (Lawson and Mason, 1998;Coelho et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…In contaminated areas, this will imply a decisive role in mercury mobilization and transfer from sediments and detritus to higher levels in the food chain, considering that this species is the main dietary item for several estuarine predators (Scaps, 2002). Some information on mercury accumulation by this species is available in literature (Muhaya et al, 1997;Coelho et al, 2007), where it was found to accumulate less mercury than Scrobicularia plana despite similar dietary strategies (Coelho et al, 2007). Nevertheless, mercury levels were not corrected for individual age and hence no direct comparison between the two species can be made.…”

Section: Introductionmentioning

confidence: 99%

The role of two sediment-dwelling invertebrates on the mercury transfer from sediments to the estuarine trophic web

Coelho

Nunes

Dolbeth

et al. 2008

Estuarine, Coastal and Shelf Science

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The annual total and organic mercury bioaccumulation pattern of Scrobicularia plana and Hediste diversicolor was assessed to evaluate the potential mercury transfer from contaminated sediments to estuarine food webs. S. plana was found to accumulate more total and organic mercury than H. diversicolor, up to 0.79 mg kg À1 and 0.15 mg kg À1 (wet weight) respectively, with a maximum annual uptake of 0.21 mg kg À1 y À1 , while for methylmercury the annual accumulation was similar between species and never exceeded 0.045 mg kg À1 y À1 . The higher organic mercury fraction in H. diversicolor is related to the omnivorous diet of this species. Both species increase methylmercury exposure by burrowing activities and uptake in anoxic, methylmercury rich sediment layers. Integration with the annual biological production of each species revealed mercury incorporation rates that reached 28 mg m À2 y À1 , and to extract as much as 11.5 g Hg y À1 (of which 95% associated with S. plana) in the 0.4 km 2 of the most contaminated area, that can be transferred to higher trophic levels. S. plana is therefore an essential vector in the mercury biomagnification processes, through uptake from contaminated sediments and, by predation, to transfer it to economically important and exploited estuarine species.

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Mercury contamination in invertebrate biota in a temperate coastal lagoon (Ria de Aveiro, Portugal)

Abstract: Effect of anthracene and solar ultraviolet radiation exposure on gill ATPase and selected hematological measurements in bluegill sunfish (Lepomis macrochirus). Aquatic Toxicology 24, 207-218.

Cited by 17 publications

References 19 publications

Different mercury bioaccumulation kinetics by two macrobenthic species: The bivalve Scrobicularia plana and the polychaete Hediste diversicolor

Different mercury bioaccumulation kinetics by two macrobenthic species: The bivalve Scrobicularia plana and the polychaete Hediste diversicolor

Assimilation of Elements and Digestion in Grass Shrimp Pre-Exposed to Dietary Mercury

The role of two sediment-dwelling invertebrates on the mercury transfer from sediments to the estuarine trophic web

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