Abstract:
:The joint toxicity of combined metals and polynuclear aromatic hydrocarbons is poorly understood and may deviate from the summed concentration responses of the individual pollutants. The freshwater amphipod Hyalella azteca was exposed to sediment-amended Cd and phenanthrene (Phen) individually and in combination using United States Environmental Protection Agency 10-day sediment toxicity bioassays with lethality and growth end points. The lethal joint toxicity of Cd and Phen was investigated separately in 24-, 48-, and 72-hour aqueous exposures. In sediment exposures, a sublethal concentration of Phen (144 mg kg(-1)) in combination with Cd increased mortality across a range of Cd concentrations and decreased the 10-day LC50 for Cd from 523 mg kg(-1) (461 to 588, 95% confidence interval [CI]) to 263 mg kg(-1) (214 to 312, 95% CI). In contrast, sublethal concentrations of Phen had no effect on the lethal toxicity of Cd in aqueous exposures. Combined sediment-amended Cd and Phen acted independently on growth rate. Rate decreases were driven primarily by Cd. Our findings indicated that association with sediment influences the joint toxicity of Cd and Phen. Thus, mixtures of Cd and Phen may cause synergistic or independent toxicity in H. azteca depending on the end point investigated and the experimental protocol employed. As an implication of these results, the interpretation of standardized toxicity bioassays, including whole-effluent toxicity tests and single-compound toxicity tests, must be made with caution. These assessment protocols may underestimate potentially hazardous mixture effects in sediment environments. Therefore, risk assessment protocols for environments containing metal-PAH mixtures must include robust methods that can detect possible interactive effects among contaminants to optimize environmental protection.
journal_name
Arch Environ Contam Toxicoljournal_title
Archives of environmental contamination and toxicologyauthors
Gust KAdoi
10.1007/s00244-004-4163-1subject
Has Abstractpub_date
2006-01-01 00:00:00pages
7-13issue
1eissn
0090-4341issn
1432-0703journal_volume
50pub_type
杂志文章abstract::In the Willamette River Basin (Oregon, USA), various residential, municipal, industrial, and agricultural activities produce physical, biological, and chemical stressors that may impinge on the basin's aquatic ecosystems. For > 30 years, numerous water-quality and biological-condition data have been accumulated by oft...
journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
doi:10.1007/s00244-011-9713-8
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journal_title:Archives of environmental contamination and toxicology
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doi:10.1007/s00244-014-0103-x
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journal_title:Archives of environmental contamination and toxicology
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journal_title:Archives of environmental contamination and toxicology
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doi:10.1007/BF00212097
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journal_title:Archives of environmental contamination and toxicology
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journal_title:Archives of environmental contamination and toxicology
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doi:10.1007/BF00216244
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journal_title:Archives of environmental contamination and toxicology
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journal_title:Archives of environmental contamination and toxicology
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doi:10.1007/s002449900322
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journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章,评审
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journal_title:Archives of environmental contamination and toxicology
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doi:10.1007/s002449900259
更新日期:1997-10-01 00:00:00
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journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
doi:10.1007/BF00212567
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journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
doi:10.1007/BF01054986
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journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
doi:10.1007/s00244-004-0093-1
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journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
doi:10.1007/BF02097759
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journal_title:Archives of environmental contamination and toxicology
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journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
doi:10.1007/s00244-012-9812-1
更新日期:2013-01-01 00:00:00
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journal_title:Archives of environmental contamination and toxicology
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journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
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journal_title:Archives of environmental contamination and toxicology
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journal_title:Archives of environmental contamination and toxicology
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更新日期:2012-01-01 00:00:00
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journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
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journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
doi:10.1007/s00244-015-0198-8
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journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
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更新日期:2005-05-01 00:00:00
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journal_title:Archives of environmental contamination and toxicology
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journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
doi:10.1007/BF01055559
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journal_title:Archives of environmental contamination and toxicology
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更新日期:2001-11-01 00:00:00
abstract::A remedial investigation/feasibility study (RI/FS) of the Calcasieu Estuary cooperative site was initiated in 1998. This site, which is located in the southwestern portion of Louisiana in the vicinity of Lake Charles, includes the portion of the estuary from the saltwater barrier on the Calcasieu River to Moss Lake. A...
journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
doi:10.1007/s00244-010-9636-9
更新日期:2011-07-01 00:00:00
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journal_title:Archives of environmental contamination and toxicology
pub_type: 杂志文章
doi:10.1007/s00244-003-2217-4
更新日期:2003-11-01 00:00:00
abstract::Retinol-binding protein (RBP) in the Rhesus monkey had the same electrophoretic mobility, molecular weight, and common antigens as human RBP; beta 2-microglobulin protein (MG) had similar electrophoretic mobility and partial common antigens to human MG. After a prolonged oral administration of cadmium chloride to 10 m...
journal_title:Archives of environmental contamination and toxicology
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doi:10.1007/BF01055631
更新日期:1981-01-01 00:00:00