Abundance and vertical flux of Pseudo-nitzschia in the northern Gulf of Mexico

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dc.acquisition-srcDownloaded from-Web of Scienceen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorDortch Qen_US
dc.contributor.authorRobichaux Ren_US
dc.contributor.authorPool Sen_US
dc.contributor.authorMilsted Den_US
dc.contributor.authorMire Gen_US
dc.contributor.authorRabalais NNen_US
dc.contributor.authorSoniat TMen_US
dc.contributor.authorFryxell GAen_US
dc.contributor.authorTurner REen_US
dc.contributor.authorParsons MLen_US
dc.contributor.otherMarine Ecology-Progress Seriesen_US
dc.date.accessioned2010-02-15T17:17:27Z
dc.date.available2010-02-15T17:17:27Z
dc.date.issued1997 Janen_US
dc.degreeen_US
dc.description249-264en_US
dc.description-otheren_US
dc.description.abstractMany species of the ubiquitous pennate diatom genus Pseudo-nitzschia have recently been discovered to produce domoic acid, a potent neurotoxin which causes Amnesic Shellfish Poisoning (ASP). Pseudo-nitzschia spp. were extremely abundant (up to 10(8) cells l(-1); present in 67% of 2195 samples) from 1990 to 1994 on the Louisiana and Texas, USA, continental shelves and moderately abundant (up to 10(5) cells l(-1); present in 18% of 192 samples) over oyster beds in the Terrebonne Bay estuary in Louisiana in 1993 and 1994. On the shelf there was a strong seasonal cycle with maxima every spring for 5 yr and sometimes in the fall, which were probably related to river flow, water column stability, and nutrient availability. In contrast, in the estuary there was no apparent seasonal cycle in abundance, but the time series of data is relatively short and the environment highly variable. At one site on the shelf, where sediment traps were deployed from spring to fall and sampled at frequent intervals in both 1990 and 1991, approximately 50% of the Pseudo-nitzschia spp. cells present in the water sank into sediment traps. Pseudo-nitzschia spp. were also abundant in surficial sediments. The species of Pseudo-nitzschia present, during this study were not routinely identified with the methods employed. However, toxin-producing P. multiseries has been identified previously from Galveston Bay, Texas, and cells from a bloom on the shelf in June 1993 were identified by scanning electron microscopy as P. pseudodelicatissima, which is sometimes toxic. Although there have been no known outbreaks of ASP in this area, historical data suggests that Pseudo-nitzschia spp,abundance may have increased on the shelf since the 1950s. It is hypothesized that the increase is due to doubling of the nutrient loading from the Mississippi and Atchafalaya rivers and increased eutrophication on the shelfen_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23494
dc.latitudeen_US
dc.locationen_US
dc.longitudeen_US
dc.notesTimes Cited: 11ArticleEnglishDortch, QLOUISIANA UNIV MARINE CONSORTIUM,8124 HIGHWAY 56,CHAUVIN,LA 70344Cited References Count: 77WL390NORDBUNTE 23, D-21385 OLDENDORF LUHE, GERMANYOLDENDORF LUHEen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries51142.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectPseudo-nitzschiaen_US
dc.subjectGulf of Mexicoen_US
dc.subjectharmful algal bloomen_US
dc.subjectDIATOM PSEUDONITZSCHIA-AUSTRALISen_US
dc.subjectMISSISSIPPI RIVER PLUMEen_US
dc.subjectDOMOIC ACID PRODUCTIONen_US
dc.subjectSILIQUA-PATULA DIXONen_US
dc.subjectSURFACE WATERSen_US
dc.subjectWEST-COASTen_US
dc.subjectPHYTOPLANKTONen_US
dc.subjectSHELLFISHen_US
dc.subjectPUNGENSen_US
dc.subjectCALIFORNIAen_US
dc.titleAbundance and vertical flux of Pseudo-nitzschia in the northern Gulf of Mexicoen_US
dc.typeJournalen_US
dc.universityen_US
dc.vol-issue146(1-3)en_US

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