Occurrence and potential adverse effects of semivolatile organic compounds in streambed sediment, United States, 1992–1995

Lopes, Thomas J.; Furlong, Edward T.

doi:10.1002/etc.5620200406

Cited by 41 publications

(17 citation statements)

References 17 publications

(23 reference statements)

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“…Both intermittent and perennial streams may acquire water along some reaches and lose water along other reaches depending on local geohydrologic conditions. Consequently, both ground water and surface water runoff can contribute contaminants to stream systems and eventually near-shore waters in the MHI (Lopes and Furlong, 2001).…”

Section: Pesticide Runoffmentioning

confidence: 99%

Survey for Selected Pathogens and Evaluation of Disease Risk Factors for Endangered Hawaiian Monk Seals in the Main Hawaiian Islands

et al. 2006

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A recently reestablished and increasing population of Hawaiian monk seals in the main Hawaiian Islands (MHI) is encouraging for this endangered species. However, seals in the MHI may be exposed to a broad range of human, pet, livestock, and feral animal pathogens. Our objective was to determine the movement and foraging habitats of Hawaiian monk seals in the MHI relative to the potential exposure of seals to infectious diseases in near-shore marine habitats. We captured 18 monk seals in the MHI between January 27, 2004 and November 29, 2005, tested them for various infectious diseases, and then monitored the foraging movements of 11 of them using satellite-linked radio transmitters for the next 32-167 days. All seals tested negative for canine adenovirus, calicivirus, four morbilliviruses, phocine herpes virus, Leptospira sp., and feline and canine heartworm antigen/antibody. Six of the seals tested positive on complement fixation for Chlamydophila abortus (formerly Chlamydia psittaci). Four seals demonstrated positive titers to Sarcocystis neurona, two to Neospora caninum, and two to Toxoplasma gondii. Fecal cultures showed approximately half (n = 6) positive for E. coli 0157, no Salmonella sp., and only one with Campylobacter sp. Satellite monitored seals spent considerable time foraging, traveling, and resting in neritic waters close to human population centers, agricultural activity, and livestock ranges, and sources of land-based water runoff and sewage dispersal.Consequently, Hawaiian monk seals in the MHI may be at risk of exposure to several infectious disease agents associated with terrestrial animals that can contaminate marine habitats from runoff along drainages and that are known to cause disease in marine mammals. Further, some seals overlapped substantially in their use of coastal habitats and several moved among islands while foraging and were seen on beaches near each other.This suggests that diseased seals could infect healthy conspecifics throughout the MHI.

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Section: Pesticide Runoffmentioning

confidence: 99%

Survey for Selected Pathogens and Evaluation of Disease Risk Factors for Endangered Hawaiian Monk Seals in the Main Hawaiian Islands

et al. 2006

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“…[13,14] PAHs are produced during the combustion of organic materials, especially fossil fuels and wood, and are released into the atmosphere. Most of these PAHs enter the aquatic environment through direct atmospheric deposition [15,16] and stormwater runoff.…”

Section: Introductionmentioning

confidence: 99%

Residue-response relationship between PAH body burdens and lysosomal membrane destabilization in eastern oysters (Crassostrea virginica) and toxicokinetics of PAHs

Hwang

Wade

Sericano

2008

Journal of Environmental Science and Health, Part A

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This study was undertaken to establish residue-response relationship between lysosomal destabilization and body residues of multiple PAHs in eastern oysters (Crassostrea virginica) exposed to a mixture of PAHs for 25 days in laboratory aquariums. The contaminated oysters were then placed in clean aquariums for 20 days to allow them to depurate and recover. The lysosomal destabilization was linearly correlated with the PAH body burdens. Regression analysis showed that critical body residue (CBR), in terms of lysosomal destabilization (at least 50% of destabilized cells), was found at 2,100 ng/g (9.32 nmol/g) of total PAHs. This CBR is much lower than the CBRs for reproduction and death, confirming that lysosomal destabilization, as a cellular level biomarker, appears to be functioning as an early warning indicator that can be used to detect aquatic contamination much before severe effects are observed. During 25 days of exposure, the lysosomal destabilization and PAH body burdens increased from 32 to 75% and 77 to 5,925 ng/g, respectively. After 20 days of elimination period, the lysosomal destabilization and PAH body burdens decreased to 49% and 2,350 ng/g, respectively. Uptake rates of PAHs showed parabolic shaped correlation with hydrophobicity (K(ow)). Uptake rate constants of more hydrophobic PAHs (log K(ow) > 4.6) had a negative correlation with K(ow), implying that hydrophobicity alone is not a satisfactory predictor for these PAHs. Elimination half-lives varied from 4 to 96 days and bioconcentration factors ranged from 650 to 160,000. Fugacity ratios (f(o)/f(w)) indicated that equilibrium still was not reached at the end of the uptake period. Data obtained from the three replicate aquariums, which were operated at the same time under the same condition, showed good replicability (RPD < 30%).

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“…Concentrations of organic matter over 10% require large amounts of dissolved oxygen, thereby decreasing the concentrations in the water overlying the sediment and generating a reducing environment that favors the formation of organic macromolecules, with a great affinity for trace metals (chelation) and xenobiotics (absorption) (Birch et al, 2001;Lopes & Furlong, 2001;Hites et al, 2004;Monteiro & Roychoudhury, 2005).…”

Section: Percentage Of Fertilizationmentioning

confidence: 99%

Ecotoxicological quality in sediments of Reloncaví and Corcovado gulfs, Chile

et al. 2007

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A study of the ecotoxicological quality of surface sediment was carried out on samples collected in the main fjords and interior channels between Reloncaví and Corcovado gulfs. The surface sediment samples were taken with a box corer and analyzed for organic matter content and grain size. Dissolved oxygen was measured in water samples taken 10 m off the bottom. The ecotoxicological evaluation of the sediments was performed using fertilization assays with gametes of Arbacia spatuligera (EPA/600/4-91/003). A fertilization rate of 95%, similar to that of the controls, was achieved. Therefore, the sediments at the sampled stations located in the middle of the channels were classified as nontoxic. Only the sediment at Station 26 (i.e., sector Dalcahue) was classified as "slightly toxic" (90 ± 4.1%). The samples were taken from the central zones of the studied channels and fjords. Since toxicologically these central areas are not polluted, any possible effects of aquaculture activities are expected to be more local in scope. Calidad ecotoxicológica de los sedimentos entre los golfos Reloncaví y Corcovado, ChileRESUMEN. Mediante el análisis de muestras de sedimento superficial, tomadas en los principales fiordos y canales interiores entre el golfo de Reloncaví y golfo Corcovado, se realiza el estudio de su calidad ecotoxicologica. Las muestras superficiales de sedimentos se obtuvieron con un box corer. Se analizó el contenido de materia orgánica y textura de los sedimentos, y oxígeno en la columna de agua disuelto de muestras de agua tomadas a 10 m del fondo. Además, se realizó la evaluación ecotoxicológica de los sedimentos mediante pruebas de fecundación con gametos de Arbacia spatuligera (EPA/600/4-91/003), resultados que indican que sobre el 95% de ovas fueron fecundadas, valor semejante a los controles, lo que permite clasificar a los sedimentos de las estaciones ubicadas en el centro de los canales como no tóxicos. Sólo el sedimento de la estación 26 (i.e., sector Dalcahue) mostró un 90 ± 4,1%, lo que se clasificaría como sedimento "levemente tóxico". Las muestras fueron recolectadas en las zonas centrales de los canales y fiordos muestreados. Se concluye que estas zonas, desde el punto de vista toxicológico, no están contaminadas por lo que se estimó que un posible efecto de las actividades de la acuicultura sería más localizado.Palabras clave: calidad de sedimentos, ensayos de fecundación, contaminación, acuicultura, zona austral, Chile.

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Occurrence and potential adverse effects of semivolatile organic compounds in streambed sediment, United States, 1992–1995

Cited by 41 publications

References 17 publications

Survey for Selected Pathogens and Evaluation of Disease Risk Factors for Endangered Hawaiian Monk Seals in the Main Hawaiian Islands

Survey for Selected Pathogens and Evaluation of Disease Risk Factors for Endangered Hawaiian Monk Seals in the Main Hawaiian Islands

Residue-response relationship between PAH body burdens and lysosomal membrane destabilization in eastern oysters (Crassostrea virginica) and toxicokinetics of PAHs

Ecotoxicological quality in sediments of Reloncaví and Corcovado gulfs, Chile

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