Assessing Photoinduced Toxicity of Polycyclic Aromatic Hydrocarbons  in an Urbanized Estuary

Vo, Minh-Tan; Porter, Dwayne E.; Chandler, G. Thomas; Kelsey, Harvey M.; Walker, Sarah; Jones, Bernt

doi:10.5751/es-00690-090503

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…UVA and UVB exposures for treatments under UV lights were 293 ( 27.3 and 0.069 ( 0.006 µW/cm 2 , respectively. While we did not measure the UV spectra at the sediment-water interface, NOAA charts indicate the average depth of the two estuaries at our stations is approximately 0.3 m. The UV spectra penetrates estuarine waters (46,47), and estimating that the UV spectrum is 10% of incident light (48) for incident light values measured at 0.5 m depth in the ER (Chesapeake Bay program http://www.chesapeakebay.net/data_waterquality. aspx), we can estimate UVA and UVB levels to be 87 and 102 µW/cm 2 , respectively, at the sediment interface.…”

Section: Resultsmentioning

confidence: 99%

Do Toxicity Identification and Evaluation Laboratory-Based Methods Reflect Causes of Field Impairment?

Gielazyn

Pelletier

et al. 2009

Environ. Sci. Technol.

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Sediment toxicity identification and evaluation (TIE) methods are relatively simple laboratory methods designed to identify specific toxicants or classes of toxicants in sediments; however, the question of whether the same toxicant identified in the laboratory is causing effects in the field remains unanswered. The objective of our study was to determine if laboratory TIE methods accurately reflect field effects. A TIE performed on sediments collected from the Elizabeth River (ER) in Virginia identified polycyclic aromatic hydrocarbons (PAHs) as the major toxicants. Several lines of evidence indicated PAHs were the major toxic agents in the field, including elevated PAH concentrations in ER sediments, comet assay results from in situ caged Merceneria merceneria, and chemical analyses of exposed M. merceneria, which indicated high PAH concentrations in the bivalve tissue. Our final evidence was the response from test organisms exposed to ER sediment extracts and then ultraviolet (UV) radiation. UV radiation caused a toxic diagnostic response unique to PAHs. The aggregation of these various lines of evidence supports the conclusion that PAHs were the likely cause of effects in laboratory- and field-exposed organisms, and that laboratory-based TIE findings reflect causes of field impairment

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Section: Resultsmentioning

confidence: 99%

Do Toxicity Identification and Evaluation Laboratory-Based Methods Reflect Causes of Field Impairment?

Gielazyn

Pelletier

et al. 2009

Environ. Sci. Technol.

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“…In the area of human health, Vo et al (2004) and Kleppel et al (2004) focus on water quality and toxic contaminants. Vo et al (2004) build a statistical model that incorporates toxicity data, ultraviolet extinction coefficients, historical sediment chemistry, and bathymetric data into a spatial model of sedimentary areas of an estuary to predict which ones are most vulnerable to toxicity from photoinduced polycyclic aromatic hydrocarbons. These hydrocarbons result from vehicle emissions, and the contamination of water bodies increases with increasing area in impervious surfaces, that is, increasing urbanization.…”

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confidence: 99%

Sprawl and the Resilience of Humans and Nature: an Introduction to the Special Feature

Allen¹

2006

E&S

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Human-driven change in land use and land cover is an accelerating global phenomenon with farreaching implications for food production, forest and water resources, the climate, and biogeochemical cycles (Foley et al. 2005). It affects the amount and configuration of habitat available for animals ranging from soil nematodes to elephants. It affects the provision of ecological goods and services for human beings. It affects the processes and function of ecosystems.

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Oil Spill Impacts on Marine Food Webs: Lessons From Contamination in Tropical Coasts

Cavalcante,

Lima,

de Souza Abessa

et al. 2024

Treatise on Estuarine and Coastal Science (Second Edition)

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Assessing Photoinduced Toxicity of Polycyclic Aromatic Hydrocarbons in an Urbanized Estuary

Cited by 3 publications

References 21 publications

Do Toxicity Identification and Evaluation Laboratory-Based Methods Reflect Causes of Field Impairment?

Do Toxicity Identification and Evaluation Laboratory-Based Methods Reflect Causes of Field Impairment?

Sprawl and the Resilience of Humans and Nature: an Introduction to the Special Feature

Oil Spill Impacts on Marine Food Webs: Lessons From Contamination in Tropical Coasts

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