| Evaluation of methods to determine causes of sediment toxicity in San Diego Bay, California, USA. | |
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MedLine Citation:
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PMID: 20138362 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Regulation of waterbodies impaired due to sediment toxicity may require development of Total Maximum Daily Load (TMDL) allocations to reduce chemicals of concern. A key step in this process is the identification of chemicals responsible for toxicity, and sediment toxicity identification evaluation procedures (TIEs) are the primary tools used to accomplish this. Several sites in San Diego Bay (CA, USA) are listed as impaired due to sediment toxicity associated with organic chemicals and metals, and due to degraded benthic macroinvertebrate communities. Sediment was collected from one of these sites, at the confluence of Switzer Creek in San Diego Harbor. The sediment was subjected to selected whole-sediment TIE treatments to evaluate the efficacy of these procedures for identifying the causes of toxicity at Switzer Creek. Toxicity was assessed using the estuarine amphipod Eohaustorius estuarius. The results indicated that toxicity of San Diego Bay sediment was likely partly due to mixtures of pyrethroid pesticides. These experiments showed that the effectiveness of the individual TIE procedures varied by treatment. Variability was mainly due to inconsistency between results of samples subjected to various Phase II TIE procedures, including chemical analyses of samples subjected to high-pressure liquid chromatography and direct analyses of acetone extractions of carbonaceous resin. The procedures require further refinement to ensure maximum sorption and complete elution and detection of sorbed chemicals. Despite these inconsistencies, the results indicate the utility of these procedures for identifying chemicals of concern in this system. |
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Authors:
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Brian S Anderson; Bryn M Phillips; John W Hunt; Sara L Clark; Jennifer P Voorhees; Ron S Tjeerdema; Jane Casteline; Margaret Stewart; Dave Crane; Abdou Mekebri |
Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't Date: 2010-02-06 |
Journal Detail:
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Title: Ecotoxicology and environmental safety Volume: 73 ISSN: 1090-2414 ISO Abbreviation: Ecotoxicol. Environ. Saf. Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-04-19 Completed Date: 2010-07-16 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7805381 Medline TA: Ecotoxicol Environ Saf Country: United States |
Other Details:
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Languages: eng Pagination: 534-40 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Elsevier Inc. All rights reserved. |
Affiliation:
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Department of Environmental Toxicology, University of California, Davis, Marine Pollution Studies Laboratory, 34500 Coast Route One, Monterey, CA 93940, USA. anderson@ucdavis.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amphipoda
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chemistry Animals California Environmental Monitoring / methods* Geologic Sediments / chemistry* Water Pollutants, Chemical / analysis, toxicity* |
| Chemical | |
Reg. No./Substance:
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0/Water Pollutants, Chemical |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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