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No. de sistema: 000058141

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 170203m20169999xx^^r^p^^^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
043 _ _ a| n-mx-tb
044 _ _ a| xx
245 0 0 a| Distribution and bioconcentration of heavy metals in a tropical aquatic food web
b| a case study of a tropical estuarine lagoon in SE Mexico
506 _ _ a| Disponible para usuarios de ECOSUR con su clave de acceso
520 1 _ a| Despite the increasing impact of heavy metal pollution in southern Mexico due to urban growth and agricultural and petroleum activities, few studies have focused on the behavior and relationships of these pollutants in the biotic and abiotic components of aquatic environments. Here, we studied the bioaccumulation of heavy metals (Cd, Cr, Ni, Pb, V, Zn) in suspended load, sediment, primary producers, mollusks, crustaceans, and fish, in a deltaic lagoon habitat in the Tabasco coast, with the aim to assess the potential ecological risk in that important wetland. Zn showed the highest concentrations, e.g., in suspended load (mean of 159.58 mg kg-¹) and aquatic consumers (15.43─171.71 mg kg-¹), particularly Brachyura larvae and ichthyoplankton (112.22─171.71 mg kg-¹), followed by omnivore Callinectes sp. crabs (113.81─128.07 mg kg-¹). The highest bioconcentration factors (BCF) of Zn were observed for planktivore and omnivore crustaceans (3.06─3.08). Zn showed a pattern of distribution in the food web through two pathways: the pelagic (where the higher concentrations were found), and the benthic (marsh plants, sediment, mollusk, fish).
520 1 _ a| The other heavy metals had lower occurrences in the food web. Nevertheless, high concentrations of Ni and Cr were found in phytoplankton and sediment (37.62─119.97 mg kg-¹), and V in epiphytes (68.64 mg kg-¹). Ni, Cr, and Cd concentrations in sediments surpassed international and national threshold values, and Cd entailed a “considerable” potential risk. These heavy metals are most likely transferred into the food web up to fishes through the benthic pathway. Most of the collected fishes are residents in this type of habitat and have commercial importance. Our results show that the total potential ecological risk in the area can be considered as “moderate” . Nevertheless, heavy metal values were similar or surpassed the values from other highly industrialized tropical coastal regions.
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Contaminación del agua
650 _ 4 a| Metales pesados
650 _ 4 a| Fitopláncton
650 _ 4 a| Sedimentos contaminados
650 _ 4 a| Moluscos
650 _ 4 a| Peces
650 _ 4 a| Riesgos ambientales
651 _ 4 a| Laguna San Pedrito, Reserva de la Biosfera Pantanos de Centla (Tabasco, México)
700 1 _ a| Mendoza Carranza, Manuel
c| Dr.
e| coaut.
700 1 _ a| Sepúlveda Lozada, Alejandra
e| coaut.
700 1 _ a| Dias Ferreira, Celia
e| coaut.
700 1 _ a| Geissen Geissen, Violette
e| coaut.
773 0 _
t| Environmental Pollution
g| Vol. 210 (March 2016), p. 155-165
x| 0269-7491
900 _ _ a| Solicítelo con su bibliotecario/a
901 _ _ a| Artículo con arbitraje
902 _ _ a| BG / MM
904 _ _ a| Enero 2017
905 _ _ a| Artecosur
905 _ _ a| Artfrosur
905 _ _ a| Desastres
905 _ _ a| Biblioelectrónica
LNG eng
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*Solicítelo con su bibliotecario/a
Distribution and bioconcentration of heavy metals in a tropical aquatic food web: a case study of a tropical estuarine lagoon in SE Mexico
Mendoza Carranza, Manuel (autor)
Sepúlveda Lozada, Alejandra (autor)
Dias Ferreira, Celia (autor)
Geissen Geissen, Violette (autor)
Nota: Disponible para usuarios de ECOSUR con su clave de acceso
Contenido en: Environmental Pollution. Vol. 210 (March 2016), p. 155-165. ISSN: 0269-7491
No. de sistema: 58141
Tipo: - Artículo con arbitraje
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Inglés

"Despite the increasing impact of heavy metal pollution in southern Mexico due to urban growth and agricultural and petroleum activities, few studies have focused on the behavior and relationships of these pollutants in the biotic and abiotic components of aquatic environments. Here, we studied the bioaccumulation of heavy metals (Cd, Cr, Ni, Pb, V, Zn) in suspended load, sediment, primary producers, mollusks, crustaceans, and fish, in a deltaic lagoon habitat in the Tabasco coast, with the aim to assess the potential ecological risk in that important wetland. Zn showed the highest concentrations, e.g., in suspended load (mean of 159.58 mg kg-¹) and aquatic consumers (15.43─171.71 mg kg-¹), particularly Brachyura larvae and ichthyoplankton (112.22─171.71 mg kg-¹), followed by omnivore Callinectes sp. crabs (113.81─128.07 mg kg-¹). The highest bioconcentration factors (BCF) of Zn were observed for planktivore and omnivore crustaceans (3.06─3.08). Zn showed a pattern of distribution in the food web through two pathways: the pelagic (where the higher concentrations were found), and the benthic (marsh plants, sediment, mollusk, fish)."

"The other heavy metals had lower occurrences in the food web. Nevertheless, high concentrations of Ni and Cr were found in phytoplankton and sediment (37.62─119.97 mg kg-¹), and V in epiphytes (68.64 mg kg-¹). Ni, Cr, and Cd concentrations in sediments surpassed international and national threshold values, and Cd entailed a “considerable” potential risk. These heavy metals are most likely transferred into the food web up to fishes through the benthic pathway. Most of the collected fishes are residents in this type of habitat and have commercial importance. Our results show that the total potential ecological risk in the area can be considered as “moderate” . Nevertheless, heavy metal values were similar or surpassed the values from other highly industrialized tropical coastal regions."


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