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

Cardoso, P.G.; Lillebø, Ana I.; Pereira, Eduarda; Duarte, Armando C.; Pardal, Miguel Ângelo

doi:10.1016/j.marenvres.2009.03.006

Cited by 26 publications

(15 citation statements)

References 20 publications

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“…Its main pollution sources are effluents-most from sewage treatment plants giving support to about 200,000 inhabitants and to different types of industries-and agricultural run-offs, the end result of 15,000 ha of cultivated land (mostly rice and corn fields) located upstream the Mondego estuary; despite reported as less polluted than the two other estuaries, its pollution increased over the last decade. Despite this fact, there are zones in the estuary that are being used as references, for instance as to mercury pollution (Cardoso et al 2009) …”

Section: Sampling Areamentioning

confidence: 99%

Frequency of micronuclei and of other nuclear abnormalities in erythrocytes of the grey mullet from the Mondego, Douro and Ave estuaries—Portugal

Carrola

Santos

Rocha

et al. 2014

Environ Sci Pollut Res

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Fish are bioindicators of water pollution, and an increased rate of their erythrocyte nuclear morphological abnormalities (ENMAs)-and particularly of erythrocyte micronuclei (EMN)-is used as a genotoxicity biomarker. Despite the potential value of ENMAs and MN, there is scarce information about fish captured in Iberian estuaries. This is the case of the Portuguese estuaries of the Mondego, Douro and Ave, suffering from different levels of environmental stress and where chemical surveys have been disclosing significant amounts of certain pollutants. So, the aim of this study was to evaluate genotoxicants impacts and infer about the exposure at those ecosystems, using the grey mullet (Mugil cephalus) as bioindicator and considering the type and frequency of nuclear abnormalities of erythrocytes as proxies of genotoxicity. Sampling of mullets was done throughout the year in the important Mondego, Douro and Ave River estuaries (centre and north-western Portugal). The fish (total n=242) were caught in campaigns made in spring-summer and autumnwinter, using nets or fishing rods. The sampled mullets were comparable between locations in terms of the basic biometric parameters. Blood smears were stained with Diff-Quik to assess the frequencies of six types of ENMAs and MN (given per 1,000 erythrocytes). Some basic water physicochemical parameters were recorded to search for fluctuations matching the ENMAs. Overall, the most frequent nucleus abnormality was the polymorphic type, sequentially followed by the blebbed/ lobed/notched, segmented, kidney shaped, vacuolated, MN and binucleated. The total average frequency of the ENMAs ranged from 73‰ in the Mondego to 108‰ in the Ave. The polymorphic type was typically ≥50 % of the total ENMAs, averaging about 51‰, when considering all three estuaries. The most serious lesion-the MN-in fish from Mondego and Douro had a similar frequency (≈0.38‰), which was significantly lower than that in the Ave (0.75‰). No significant seasonal differences existed as to the MN rates and seasonal differences existed almost only in the Douro, with the higher values in AW. In general, the pattern of ENMAs frequencies was unrelated with the water physicochemical parameters. Considering the data for both the total ENMAs and for each specific abnormality, and bearing in mind that values of MN in fish erythrocytes >0.3‰ usually reflect pollution by genotoxicants, it is suggested that mullets were likely being chronically exposed to such compounds, even in the allegedly less polluted ecosystem (Mondego). Moreover, data supported the following pollution

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Section: Sampling Areamentioning

confidence: 99%

Frequency of micronuclei and of other nuclear abnormalities in erythrocytes of the grey mullet from the Mondego, Douro and Ave estuaries—Portugal

Carrola

Santos

Rocha

et al. 2014

Environ Sci Pollut Res

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“…Because mercury accumulation rates differ among bivalve species according to different feeding strategies and assimilation efficiencies [15], changes in the way bivalve communities are composed can conceivably influence how mercury moves through food webs.…”

Section: From the Pond To The Web To The Nestmentioning

confidence: 99%

In a state of flux: The energetic pathways that move contaminants from aquatic to terrestrial environments

Sullivan

Rodewald

2012

Enviro Toxic and Chemistry

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“…(LUOMA and RAINBOW, 2008). The ecotoxicological risk due to the metal-polluted sediments will depend on the metals' partitioning and bioavailability, as well as on the ability of organisms to assimilate metals (CARDOSO et al, 2009). Metals such as cadmium (Cd), chromium (Cr), cobalt (Co), lead (Pb), nickel (Ni), copper (Cu) and zinc (Zn) and the metalloid arsenic (As), are toxic elements that accumulate in the sediments of estuaries and can affect biological processes in the associated fauna (LUOMA and RAINBOW, 2008).…”

Section: Introductionmentioning

confidence: 99%

Integrated assessment of contaminants and monitoring of an urbanized temperate harbor (Montevideo, Uruguay): a 12-year comparison

et al. 2015

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Integrated assessment of contaminants and monitoring of an urbanized temperate harbor (Montevideo, Uruguay): a 12-year comparisonSituated opposite the Freshwater Front, Montevideo city with its more than 1.5 million inhabitants encircles Montevideo Bay, where one of the most active and polluted harbors in South America is located. Faecal sterols, trace metals, organochlorine compounds and petroleum derivatives in the sediments of Montevideo Harbor were evaluated and their spatial distribution inside the harbor as well as in the input of two main tributary streams analyzed. Specifically for the harbor sites, a temporal comparison of metal and hydrocarbons was made with previous measurements taken 12 years ago. Clear changes were observed at these sites. The concentration of metals such as Pb, Cr and Zn have diminished, while aliphatic hydrocarbons have increased their values at almost all of the stations studied. Differences were observed between summer and winter suggesting sedimentation, input or hydrodynamic changes in the area. These results help one to understand the present situation and develop the management measures needed to improve the environmental quality of the harbor and bay. AbstrAct

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

Cited by 26 publications

References 20 publications

Frequency of micronuclei and of other nuclear abnormalities in erythrocytes of the grey mullet from the Mondego, Douro and Ave estuaries—Portugal

Frequency of micronuclei and of other nuclear abnormalities in erythrocytes of the grey mullet from the Mondego, Douro and Ave estuaries—Portugal

In a state of flux: The energetic pathways that move contaminants from aquatic to terrestrial environments

Integrated assessment of contaminants and monitoring of an urbanized temperate harbor (Montevideo, Uruguay): a 12-year comparison

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