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137Cs baseline levels in the Mediterranean and Black Sea: A cross-basin survey of the CIESM Mediterranean Mussel Watch programme Texto completo
2008
Thébault, H. | Baena, A.M., Rodriguez y | Andral, B. | Barisic, D. | Albaladejo, J.B. | Bologa, A.S. | Boudjenoun, R. | Delfanti, R. | Egorov, V.N. | El Khoukhi, T. | Florou, H. | Kniewald, G. | Noureddine, A. | Patrascu, V. | Pham, M.K. | Scarpato, A. | Stokozov, N.A. | Topcuoglu, S. | Warnau, M. | Laboratoire d'étude radioécologique du milieu continental et marin (IRSN/DEI/SESURE/LERCM) ; Service d'étude et de surveillance de la radioactivité dans l'environnement (IRSN/DEI/SESURE) ; Institut de Radioprotection et de Sûreté Nucléaire (IRSN)-Institut de Radioprotection et de Sûreté Nucléaire (IRSN) | Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) | Center for Marine and Environmental Research ; Rudjer Boskovic Institute [Zagreb] | Instituto Español de Oceanografía - Spanish Institute of Oceanography (IEO) ; Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] (CSIC) | National Institute for Marine Research and Development "Grigore Antipa" (NIMRD) | Agenzia Nazionale per le nuove Tecnologie, l’energia e lo sviluppo economico sostenibile = Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA) | NATIONAL ACADEMY OF SCIENCES OF THE UKRAINE KHARKOV UKR ; Partenaires IRSTEA ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) | Centre National de l'Énergie, des Sciences et des Techniques Nucléaires = National Center for Energy, Science and Nuclear Techniques (CNESTEN) | National Center for Scientific Research "Demokritos" (NCSR) | Marine Environment Laboratories [Monaco] (IAEA-MEL) ; International Atomic Energy Agency [Vienna] (IAEA) | I.C.R.A.M. - Central Institute for Applied Marine Research ; I.C.R.A.M. - Central Institute for Applied Marine Research
137Cs baseline levels in the Mediterranean and Black Sea: A cross-basin survey of the CIESM Mediterranean Mussel Watch programme Texto completo
2008
Thébault, H. | Baena, A.M., Rodriguez y | Andral, B. | Barisic, D. | Albaladejo, J.B. | Bologa, A.S. | Boudjenoun, R. | Delfanti, R. | Egorov, V.N. | El Khoukhi, T. | Florou, H. | Kniewald, G. | Noureddine, A. | Patrascu, V. | Pham, M.K. | Scarpato, A. | Stokozov, N.A. | Topcuoglu, S. | Warnau, M. | Laboratoire d'étude radioécologique du milieu continental et marin (IRSN/DEI/SESURE/LERCM) ; Service d'étude et de surveillance de la radioactivité dans l'environnement (IRSN/DEI/SESURE) ; Institut de Radioprotection et de Sûreté Nucléaire (IRSN)-Institut de Radioprotection et de Sûreté Nucléaire (IRSN) | Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) | Center for Marine and Environmental Research ; Rudjer Boskovic Institute [Zagreb] | Instituto Español de Oceanografía - Spanish Institute of Oceanography (IEO) ; Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] (CSIC) | National Institute for Marine Research and Development "Grigore Antipa" (NIMRD) | Agenzia Nazionale per le nuove Tecnologie, l’energia e lo sviluppo economico sostenibile = Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA) | NATIONAL ACADEMY OF SCIENCES OF THE UKRAINE KHARKOV UKR ; Partenaires IRSTEA ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) | Centre National de l'Énergie, des Sciences et des Techniques Nucléaires = National Center for Energy, Science and Nuclear Techniques (CNESTEN) | National Center for Scientific Research "Demokritos" (NCSR) | Marine Environment Laboratories [Monaco] (IAEA-MEL) ; International Atomic Energy Agency [Vienna] (IAEA) | I.C.R.A.M. - Central Institute for Applied Marine Research ; I.C.R.A.M. - Central Institute for Applied Marine Research
International audience | The common mussel Mytilus galloprovincialis was selected as unique biomonitor species to implement a regional monitoring programme, the CIESM Mediterranean Mussel Watch (MMW), in the Mediterranean and Black Seas. As of today, and upon standardization of the methodological approach, the MMW Network has been able to quantify 137Cs levels in mussels from 60 coastal stations and to produce the first distribution map of this artificial radionuclide at the scale of the entire Mediterranean and Black Seas. While measured 137Cs levels were found to be very low (usually <1 Bq kg-1 wet wt) 137Cs activity concentrations in the Black Sea and North Aegean Sea were up to two orders of magnitude higher than those in the western Mediterranean Basin. Such effects, far from representing a threat to human populations or the environment, reflect a persistent signature of the Chernobyl fallout in this area. © 2007 Elsevier Ltd. All rights reserved.
Mostrar más [+] Menos [-]Cs-137 baseline levels in the Mediterranean and Black Sea: A cross-basin survey of the CIESM Mediterranean Mussel Watch programme Texto completo
2008
Thebault, Herve | Baena, A | Andral, Bruno | Barisic, D | Albaladejo, J | Bologa, A | Boudjenoun, R | Delfanti, R | Egorov, V | Khoukhi, T | Florou, H | Kniewald, G | Noureddine, A | Patrascu, V | Pham, M | Scarpato, A | Stokozov, N | Topcuoglu, S | Warnau, M
The common mussel Mytilus galloprovincialis was selected as unique biomonitor species to implement a regional monitoring programme, the CIESM Mediterranean Mussel Watch (MMW), in the Mediterranean and Black Seas. As of today, and upon standardization of the methodological approach, the MMW Network has been able to quantify Cs-137 levels in mussels from 60 coastal stations and to produce the first distribution map of this artificial radionuclide at the scale of the entire Mediterranean and Black Seas. While: measured Cs-137 levels were found to be very low (usually <1 Bq kg(-1) wet wt) Cs-137 activity concentrations in the Black Sea and North Aegean Sea were up to two orders of magnitude higher than those in the western Mediterranean Basin. Such effects, far from representing a threat to human populations or the environment, reflect a persistent signature of the Chernobyl fallout in this area. (C) 2007 Elsevier Ltd. All rights reserved.
Mostrar más [+] Menos [-]Bioturbation effects on metal release from contaminated sediments are metal-dependent Texto completo
2019
Xie, Minwei | Simpson, Stuart L. | Wang, Wen-Xiong
Metal flux measurements inform the mobility, potential bioavailability and risk of toxicity for metals in contaminated sediments and therefore is an important approach for sediment quality assessment. The binding and release of metals that contribute to the net flux is strongly influenced by the presence and behaviors of benthic organisms. Here we studied the effects of bioturbation on the mobility and efflux of metals from multi-metal contaminated sediments that inhabited by oligochaete worms or both worms and bivalves. Presence of bivalves enhanced the release of Mn, Co, Ni and Zn but not for copper and chromium, which is likely due to the high affinities of copper and chromium for the solid phase. Metals in the overlying water were primarily associated with fractions smaller than 10 kDa, and the fractionation of all metals were not affected by the presence of the bivalve. Metal fluxes attributed to different processes were also distinguished, and the bioturbation induced effluxes were substantially higher than the diffusive effluxes. Temporal variabilities in the total net effluxes of Mn, Co, Ni and Zn were also observed and were attributed to the biological activities of the bivalves. Overall, the present study demonstrated that the response of different metals to the same bioturbation behavior was different, resulting in distinct mobility and fate of the metal contaminants.
Mostrar más [+] Menos [-]Use of resources and microplastic contamination throughout the life cycle of grunts (Haemulidae) in a tropical estuary Texto completo
2018
Silva, José D.B. | Barletta, Mario | Lima, André R.A. | Ferreira, Guilherme V.B.
The distribution, feeding ecology and microplastic contamination were assessed in different ontogenetic phases of Haemulidae species inhabiting the Goiana Estuary, over a seasonal cycle. Pomadasys ramosus and Haemulopsis corvinaeformis are estuarine dependent species that use habitats with specific environmental conditions each season. Pomadasys ramosus was found in the upper and middle estuaries during the rainy season, when salinity showed the lowest values. Haemulopsis corvinaeformis was found in the lower estuary during the dry season, when salinity increased in the estuary. Juveniles of P. ramosus are zooplanktivores, feeding mainly on calanoid copepods. Sub-adults and adults are zoobenthivores, feeding on invertebrates associated to the bottom, mainly Polychaeta. Juveniles of H. corvinaeformis were not found in the main channel, but sub-adults and adults showed a zoobenthivore habit, feeding mainly on Anomalocardia flexuosa (Mollusca: Bivalvia). Dietary shifts along the life cycle and the spatio-temporal relationship between their distribution and the availability of microplastics along the estuary seem to have a strong influence in the ingestion of microfilaments. The highest average ingestion of microfilaments by P. ramosus coincided with the peak of ingestion of Polychaeta by sub-adults in the upper estuary during the late rainy season. For H. corvinaeformis the highest ingestion of microfilaments coincided with the peak of ingestion of A. flexuosa by adults in the lower estuary during the late dry season. Such contamination might be attributed to the time when these phases shifted to a more diverse diet and began to forage on benthic invertebrates. Research on microplastic contamination must consider species-specific behaviour, since the intake of microplastics is dependent on patterns of distribution and trophic guild within fish assemblages.
Mostrar más [+] Menos [-]Presence of microplastics in benthic and epibenthic organisms: Influence of habitat, feeding mode and trophic level Texto completo
2018
Bour, Agathe | Avio, Carlo Giacomo | Gorbi, Stefania | Regoli, Francesco | Hylland, Ketil
The exponential production and use of plastics has generated increasing environmental release over the past decades, and microplastics (MPs) have been reported across all the oceans. Field studies have documented the occurrence of MPs in several species, but important knowledge gaps still remain. In the present study, we characterized the distribution of MPs in ten sediment-dwelling and epibenthic species representative of different habitat, feeding modes and trophic levels within the inner Oslofjord (Oslo, Norway), an area subjected to moderate anthropogenic pressures. Analysed species included fish, bivalves, echinoderms, crustaceans and polychaetes. MPs were present in all the species with a frequency up to 65% of positive individuals for some species. In most cases, 1 or 2 MPs were found per individual, but some organisms contained up to 7 particles. A total of 8 polymer typologies were identified, with PE and PP being the most common according to our extraction protocol. MP sizes ranged from 41 μm to lines as long as 9 mm. Our results indicate that occurrence of MPs in analysed biota is not influenced by organism habitat or trophic level, while characteristics and typology of polymers might be significantly affected by feeding mode of organisms.
Mostrar más [+] Menos [-]How does the metallothionein induction in bivalves meet the criteria for biomarkers of metal exposure? Texto completo
2016
Le, T.T Yen | Zimmermann, Sonja | Sures, Bernd
Metallothionein (MT) concentrations in the whole soft tissue or in a particular tissue of bivalves have widely been used in ecotoxicological studies and biomonitoring programmes. This approach is based on the reported results on the enhancement of MT induction in bivalves in response to metal exposure. The validity of using MT induction as a biomarker is briefly assessed in the present study. The sensitivity of MT induction in these organisms is questionable due to the high basal MT level as well as the high natural variability related to the effects of a number of biotic and abiotic factors, which are not well described yet. Moreover, the relationship between exposure to metals, the toxic effects of that exposure, and the appearance of MT in soft tissue, is not well characterized. A variety of factors may influence the appearance and distribution of MT: 1) the uneven distribution of metals in particular portions of the soft tissue and in particular subcellular compartments; 2) pre-exposure to metals, perhaps at non-toxic levels; 3) metal–metal competition and metal-protein interactions; and 4) tissue-specific induction, functions, and isoforms of MT. Therefore, attention is required when using MT induction in bivalves for assessment of metal exposure or consequent toxic effects. The MT concentration can be a reliable indicator only when it is considered in relation with metal uptake kinetics and subcellular partitioning while specifying the isoform of MT synthesised and considering various confounding factors. The kinetic turnover of MT may provide useful information on metal exposure and biological effects since it covers both the synthesis and breakdown of MT as well as the chemical species of metals accumulated and MT.
Mostrar más [+] Menos [-]How life history influences the responses of the clam Scrobicularia plana to the combined impacts of carbamazepine and pH decrease Texto completo
2015
Freitas, Rosa | Almeida, Angela Maria da | Calisto, Vânia | Velez, Cátia | Moreira, Anthony | Schneider, Rudolf J. | Esteves, Valdemar I. | Wrona, Frederick J. | Soares, Amadeu M.V. M. | Figueira, Etelvina
How life history influences the responses of the clam Scrobicularia plana to the combined impacts of carbamazepine and pH decrease Texto completo
2015
Freitas, Rosa | Almeida, Angela Maria da | Calisto, Vânia | Velez, Cátia | Moreira, Anthony | Schneider, Rudolf J. | Esteves, Valdemar I. | Wrona, Frederick J. | Soares, Amadeu M.V. M. | Figueira, Etelvina
In the present study, the bivalve Scrobicularia plana, collected from two contrasting areas (pristine location and mercury contaminated area), was selected to assess the biochemical alterations imposed by pH decrease, carbamazepine (an antiepileptic) and the combined effect of both stressors. The effects on oxidative stress related biomarkers after 96 h exposure revealed that pH decrease and carbamazepine induced alterations on clams, with greater impacts on individuals from the contaminated area which presented higher mortality, higher lipid peroxidation and higher glutathione S-transferase activity. These results emphasize the risk of extrapolating results from one area to another, since the same species inhabiting different areas may be affected differently when exposed to the same stressors. Furthermore, the results obtained showed that, when combined, the impact of pH decrease and carbamazepine was lower than each stressor acting alone, which could be related to the defence mechanism of valves closure when bivalves are under higher stressful conditions.
Mostrar más [+] Menos [-]How life history influences the responses of the clam Scrobicularia plana to the combined impacts of carbamazepine and pH decrease Texto completo
1000 | 2015
Freitas, Rosa | Almeida, Ângela | Calisto, Vânia | Velez, Cátia | Moreira, Anthony | Schneider, Rudolf J. | Esteves, Valdemar I. | Wrona, Frederick J. | Soares, Amadeu M. V. M. | Figueira, Etelvina
In the present study, the bivalve Scrobicularia plana, collected from two contrasting areas (pristine location and mercury contaminated area), was selected to assess the biochemical alterations imposed by pH decrease, carbamazepine (an antiepileptic) and the combined effect of both stressors. The effects on oxidative stress related biomarkers after 96 h exposure revealed that pH decrease and carbamazepine induced alterations on clams, with greater impacts on individuals from the contaminated area which presented higher mortality, higher lipid peroxidation and higher glutathione S-transferase activity. These results emphasize the risk of extrapolating results from one area to another, since the same species inhabiting different areas may be affected differently when exposed to the same stressors. Furthermore, the results obtained showed that, when combined, the impact of pH decrease and carbamazepine was lower than each stressor acting alone, which could be related to the defence mechanism of valves closure when bivalves are under higher stressful conditions.
Mostrar más [+] Menos [-]Ecological responses to contamination: A meta-analysis of experimental marine studies Texto completo
2014
O'Brien, Allyson L. | Keough, Michael J.
Identifying general response patterns to contamination in the environment is critical for reliable assessments of ecosystem health. However, it is not often clear if there are biases in the information used to understand general effects of contamination. To investigate this we conducted a review of 314 studies that experimentally manipulated contaminants and measured the effects on marine invertebrate taxa. The majority of studies investigated the effects of metals (54%) on individual taxa (mainly bivalves, amphipods, copepods). Ecologically relevant responses to contamination were measured in only 22% of the studies. A meta-analysis using studies that measured ecological responses to copper illustrated a general negative effect of copper and highlighted the bias towards field or laboratory experiments that measure community or individual-level responses. There is a need for diversification of studies that investigate the ecological effects of contamination as an important advancement in ecotoxicology and ecological research and environmentally relevant risk assessments.
Mostrar más [+] Menos [-]Impacts of metal and metal oxide nanoparticles on marine organisms Texto completo
2014
Baker, Tony J. | Tyler, Charles R. | Galloway, Tamara S.
Increasing use of metal and metal oxide nanoparticles [Me(O)NPs] in products means many will inevitably find their way into marine systems. Their likely fate here is sedimentation following hetero-aggregation with natural organic matter and/or free anions, putting benthic, sediment-dwelling and filter feeding organisms most at risk. In marine systems, Me(O)NPs can absorb to micro-organisms with potential for trophic transfer following consumption. Filter feeders, especially bivalves, accumulate Me(O)NPs through trapping them in mucus prior to ingestion. Benthic in-fauna may directly ingest sedimented Me(O)NPs. In fish, uptake is principally via the gut following drinking, whilst Me(O)NPs caught in gill mucus may affect respiratory processes and ion transport. Currently, environmentally-realistic Me(O)NP concentrations are unlikely to cause significant adverse acute health problems, however sub-lethal effects e.g. oxidative stresses have been noted in many organisms, often deriving from dissolution of Ag, Cu or Zn ions, and this could result in chronic health impacts.
Mostrar más [+] Menos [-]Biomonitoring study of an estuarine coastal ecosystem, the Sacca di Goro lagoon, using Ruditapes philippinarum (Mollusca: Bivalvia) Texto completo
2013
Sacchi, Ângela | Mouneyrac, Catherine | Bolognesi, Claudia | Sciutto, Andrea | Roggieri, Paola | Fusi, Marco | Beone, Gian Maria | Capri, Ettore
Coastal lagoons are constantly subjected to releases of chemical pollutants, and so organisms may be exposed to such toxicants. This study investigated through a multivariate approach the physiological status of bivalve Ruditapes philippinarum, farmed in Sacca di Goro lagoon. Biomarkers at different levels of biological organization (catalase, superoxide dismutase, genotoxicity, reburrowing behavior) were evaluated at three sites exposed to different environmental conditions. A seasonal trend was observed, and micronucleus frequency was significantly lowest at the relatively pristine reference site. Enzymatic activity toward oxyradicals be quite efficient since variations in responsiveness were not consistent. However, behavioral impairment was observed in reburrowing rates. Sediment concentrations showed low PAH levels and high natural levels of trace metals Cr and Ni. DistLM statistical analysis revealed a non-significant relationship between selected biomarkers and xenobiotics. Therefore other potentially toxic compounds in admixture at low doses may be involved in driving differing spatial distribution of physiological impairment.
Mostrar más [+] Menos [-]Behaviour of Au-citrate nanoparticles in seawater and accumulation in bivalves at environmentally relevant concentrations Texto completo
2013
García-Negrete, C.A. | Blasco, J. | Volland, M. | Rojas, T.C. | Hampel, M. | Lapresta-Fernández, A. | Jiménez de Haro, M.C. | Soto, M. | Martínez Fernández, Ángel
The degree of aggregation and/or coalescence of Au-citrate nanoparticles (AuNPs, mean size 21.5 ± 2.9 nm), after delivery in simulated seawater, are shown to be concentration-dependent. At low concentrations no coalescence and only limited aggregation of primary particles were found. Experiments were performed in which the marine bivalve (Ruditapes philippinarum) was exposed to AuNPs or dissolved Au and subsequently, bivalve tissues were studied by Scanning and Transmission Electron Microscopy and chemical analyses. We show that the bivalve accumulates gold in both cases within either the digestive gland or gill tissues, in different concentrations (including values of predicted environmental relevance). After 28 days of exposure, electron-dense deposits (corresponding to AuNPs, as proven by X-ray microanalysis) were observed in the heterolysosomes of the digestive gland cells. Although non-measurable solubility of AuNPs in seawater was found, evidence is presented of the toxicity produced by Au3+ dissolved species (chloroauric acid solutions) and its relevance is discussed.
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