Détermination de la qualité des eaux du littoral mauritanien par la mesure des métaux traces chez les mollusques Donax rugosus et Venus verrucosa

Sidoumou, Zeinebou; Roméo, Michèle; Gnassia‐Barelli, M.; Nguyen, P.; Caruba, Raoul

doi:10.1051/hydro:1992204

Cited by 11 publications

(5 citation statements)

References 5 publications

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“…Our results show variability along El Jadida coast in metal concentration within and between seaweed species and sampling sites. The strong concentrations of Cd obtained in algae taken in Sidi Bouzid's zone, could be related to the abundance of this metal in seawater due to coastal upwelling responsible for the rise of deep waters that are especially rich in trace metals, including Cd [21]. Although the metal contents of seaweeds are subjected to a wide range of variations, a trend in of Fe > Mn > Zn > Cu > Cd in seaweeds was observed along El Jadida coast.…”

Section: Discussionmentioning

confidence: 96%

Diagnosis on the state of healthiness, quality of the coast and biological resources ‘case of the Moroccan Atlantic coast’ (City of El Jadida)

Kaimoussi

Chafik

Mouzdahir

et al. 2002

Comptes Rendus. Biologies

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In this study, we present a diagnosis concerning the state of healthiness of the coast of the city of El Jadida by: characterisation of the various collectors rejected in sea without any preliminary treatment, measure of the physicochemical parameters of seawater from sampling stations, evaluation of the concentration of certain heavy metals (Cd, Cu, Zn, Fe and Mn) in four species of algae, which shows that metal contents vary according to the species and the sampling stations, measure of the metal content in mussels, which varies according to the site. A comparative study with the data of the literature shows that algae and mussels generally present values that are weaker than those coming from other geographical areas.

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Section: Discussionmentioning

confidence: 96%

Diagnosis on the state of healthiness, quality of the coast and biological resources ‘case of the Moroccan Atlantic coast’ (City of El Jadida)

Kaimoussi

Chafik

Mouzdahir

et al. 2002

Comptes Rendus. Biologies

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“…Cette abondance serait liée aux courants marins responsables de la remontée des eaux profondes, spécialement riches en métaux traces, y compris Cd [21,22].…”

Section: Discussionunclassified

Variations saisonnières des teneurs en métaux (Cd, Cu, Fe, Mn et Zn) chez l'algue Ulva lactuca prélevée au niveau du littoral de la ville d'El Jadida (Maroc)

Kaimoussi

Mouzdahir

Saih

2004

Comptes Rendus. Biologies

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Présenté par Michel Thellier RésuméLa qualité des eaux côtières atlantiques d'El Jadida a été suivie d'avril 1998 à mars 1999 par la mesure des paramètres hydrologiques (oxygène dissous, matière en suspension, phosphates et nitrites) et l'utilisation de l'algue (Ulva lactuca) comme bioindicateur quantitatif de la contamination par le cadmium, le cuivre, le fer, le manganèse et le zinc. Les teneurs métalliques chez les algues récoltées chaque mois, dans quatre stations caractérisées par des rejets d'eaux usées et industrielles, montrent des variations significatives selon les stations et la saison de prélèvement. Les algues de la ville d'El Jadida présentent cependant, en général, des teneurs moins fortes comparées à celles provenant d'autres aires géographiques.

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“…Excluding local anthropogenic influence, Cd levels in molluscs are more important south of Cape Blanc (Romeo et al, 2000;Sidoumou et al, 2006Sidoumou et al, , 1999Sidoumou et al, , 1992. North of Cape Blanc, Cd levels peak at Cape Juby and decrease southward over the Saharan Bank (Banaoui et al, 2004; see also Sidoumou et al, 2006).…”

Section: Levels In Marine Resourcesmentioning

confidence: 97%

“…These high Cd concentrations are attributed to anthropogenic influence (i.e. phosphate industry, Banaoui et al, 2004;Cheggour et al, 1999;Maanan, 2008Maanan, , 2007Romeo et al, 2000;Sidoumou, 1991;Sidoumou et al, 2006Sidoumou et al, , 1999Sidoumou et al, , 1992). In the model, the anthropogenic impact in the coastal area is mainly restricted to the vicinity of the anthropogenic sources located north of Cape Sim (Fig.…”

Section: Levels In Marine Resourcesmentioning

confidence: 99%

Comparative study of potential transfer of natural and anthropogenic cadmium to plankton communities in the North-West African upwelling

Auger

Machu

Gorguès

et al. 2015

Science of The Total Environment

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A Lagrangian approach based on a physical-biogeochemical modeling was used to compare the potential transfer of cadmium (Cd) from natural and anthropogenic sources to plankton communities (Cd-uptake) in the North-West African upwelling. In this region, coastal upwelling was estimated to be the main natural source of Cd while the most significant anthropogenic source for marine ecosystem is provided by phosphate industry. In our model experiment, Cd-uptake (natural or anthropogenic) in the North-West African upwelling is the result of an interplay between the Cd dispersion (by advection processes) and the simulated biological productivity. In the Moroccan waters, advection processes limit the residence time of water masses resulting in a low natural Cd-uptake by plankton communities while anthropogenic Cd-uptake is high. As expected, the situation is reversed in the Senegalo-Mauritanian upwelling where natural Cd-uptake is higher than anthropogenic Cd-uptake. Based upon an estimate of Cd sources, our modeling study shows, unexpectedly, that the anthropogenic signal of potential Cd-bioaccumulation in the Moroccan upwelling is of the same order of magnitude as the natural signal mainly present in the Senegalo-Mauritanian upwelling region. A comparison with observed Cd levels in mollusk and fishes, which shows overall agreement with our simulations, is confirming our estimates.

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Détermination de la qualité des eaux du littoral mauritanien par la mesure des métaux traces chez les mollusques Donax rugosus et Venus verrucosa

Abstract: --Ce travail a été réalisé dans le cadre d'un accord inter-universitaire :

Cited by 11 publications

References 5 publications

Diagnosis on the state of healthiness, quality of the coast and biological resources ‘case of the Moroccan Atlantic coast’ (City of El Jadida)

Diagnosis on the state of healthiness, quality of the coast and biological resources ‘case of the Moroccan Atlantic coast’ (City of El Jadida)

Variations saisonnières des teneurs en métaux (Cd, Cu, Fe, Mn et Zn) chez l'algue Ulva lactuca prélevée au niveau du littoral de la ville d'El Jadida (Maroc)

Comparative study of potential transfer of natural and anthropogenic cadmium to plankton communities in the North-West African upwelling

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