PERSONAL DE APOYO
CATALDO Daniel Hugo
artículos
Título:
Environmental toxicity assessment in the Parana river delta (Argentina): simultaneous evaluation of selected pollutants and mortality rates of Corbicula fuminea (Bivalvia) early juveniles
Autor/es:
D. CATALDO , J.C. COLOMBO D,E, D. BOLTOVSKOY , C. BILOS D, Y P. LANDONI D
Revista:
ENVIRONMENTAL POLLUTION
Referencias:
Año: 2001 vol. 112 p. 379 - 389
ISSN:
0269-7491
Resumen:
Water and sediment samples were collected in the lower Parana delta at four sites with dierent levels of exposure to pollution to
evaluate the anthropogenic impact through chemical analyses and mortality bioassays. Individual polychlorinated biphenyls,
chlorinated pesticides, aliphatic hydrocarbons, polycyclic aromatic hydrocarbons, and heavy metals were measured in waters,
porewaters and sediments. The same three phases were also subjected to toxicity assays with straight-hinged juveniles of Corbicula
¯uminea. Concentrations of several pollutants were above levels recommended for the protection of aquatic life: in waters, Zn, Cu
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
¯uminea. Concentrations of several pollutants were above levels recommended for the protection of aquatic life: in waters, Zn, Cu
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
¯uminea. Concentrations of several pollutants were above levels recommended for the protection of aquatic life: in waters, Zn, Cu
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
Corbicula
¯uminea. Concentrations of several pollutants were above levels recommended for the protection of aquatic life: in waters, Zn, Cu
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
. Concentrations of several pollutants were above levels recommended for the protection of aquatic life: in waters, Zn, Cu
and Cr were 1.6±4.9 times higher, whereas in the sediments Cr was 1.8±3.6, and benzo(a)pyrene was 2.8±5.6 times higher. Pollutant
concentrations followed a clear geographic pattern with highest values in the densely populated area of the Reconquista and Luja n
rivers, lower levels in the San Antonio, and lowest loadings in the remote Parana de las Palmas. This gradient was adequately
matched by the pattern of mortality rates of C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability
C. ¯uminea early juveniles, which were highest in the Reconquista-Luja n (40±93%) and
lowest (and not signi®cantly dierent from the control) in the Parana (3.3±23%). Mortality rates also increased from surface waters
(3.3±53%), to porewaters (12±73%), to sediments (23±93%). Although toxicity was probably mainly due to dissolved con-
taminants, agreement between chemical and biological evidence of pollution was best for the sediment compartment, whereas
porewater and surface water showed a higher degree of variability