| Concentration and dispersal of a Pseudo-nitzschia bloom in Penn Cove, Washington, USA. | |
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MedLine Citation:
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PMID: 10223627 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A bloom of the pennate diatom Pseudo-nitzschia, several species of which are associated with the production of the potent excitotoxin domoic acid, was observed in a Puget Sound, Washington embayment in July and August of 1997. Penn Cove, which receives nutrients from the nearby Skagit River and abundant sunshine during summer months due to its location in the rain shadow of the Olympic Mountains, is the home of a commercial mussel farm which supplies shellfish to many coastal areas of the USA. Levels of domoic acid in mussels increased to 3 ppm on 6 and 10 July, corresponding to the observation of a brown algal bloom in Penn Cove. Four species of Pseudo-nitzschia (P. pungens, P. multiseries, P. australis, and P. pseudodelicatissima) were present in our samples from the cove, corresponding to levels of domoic acid in seawater ranging from 0.1-0.8 mirog l(-1) as measured by a receptor binding assay. The highest Pseudo-nitzschia concentration during the time of our sampling was 13 million cells per liter on 28 July. The bloom of Pseudo-nitzschia occurred after a period of strong discharge from the Skagit River and rain accompanied by elevated south and southeasterly winds. Stratification of the cove, providing optimal bloom conditions, was facilitated by weak winds, sunshine, and a freshwater lens at the mouth of the cove. The position of the Pseudo-nitzschia bloom was influenced by buoyancy fronts caused by exchange of water within the cove with that of Saratoga Passage. The decay of this bloom in Penn Cove was accompanied by decreasing nitrate levels at all measured depths. These and future observations aid in the development of a model for prediction of toxic bloom events in the shallow embayments of Puget Sound. |
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Authors:
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V L Trainer; N G Adams; B D Bill; B F Anulacion; J C Wekell |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Natural toxins Volume: 6 ISSN: 1056-9014 ISO Abbreviation: Nat. Toxins Publication Date: 1998 |
Date Detail:
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Created Date: 1999-06-16 Completed Date: 1999-06-16 Revised Date: 2000-12-18 |
Medline Journal Info:
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Nlm Unique ID: 9212382 Medline TA: Nat Toxins Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 113-26 Citation Subset: IM |
Affiliation:
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Marine Biotoxins Program, National Marine Fisheries Service, Northwest Fisheries Science Center, Environmental Conservation Division, Seattle, WA 98112, USA. vera.l.trainer@noaa.gov |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Diatoms* Eutrophication* Forecasting Kainic Acid / analogs & derivatives*, analysis Marine Toxins / analysis Neuromuscular Depolarizing Agents / analysis* Nitrates / analysis Rain Seasons Shellfish Washington |
| Chemical | |
Reg. No./Substance:
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0/Marine Toxins; 0/Neuromuscular Depolarizing Agents; 0/Nitrates; 14277-97-5/domoic acid; 487-79-6/Kainic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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