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dc.contributor.authorBoonyapiwat, Sopana
dc.date.accessioned2019-01-18T08:25:39Z
dc.date.available2019-01-18T08:25:39Z
dc.date.issued2001
dc.identifier.citationBoonyapiwat, S. (2001). Species composition, abundance and distribution of phytoplankton in the thermocline layer in the South China Sea, Area IV: Vietnamese waters. In Proceedings of the Fourth Technical Seminar on Marine Fishery Resources Survey in the South China Sea, Area IV: Vietnamese Waters, 18-20 September 2000 (pp. 292-309). Bangkok, Thailand: Secretariat, Southeast Asian Fisheries Development Center.en
dc.identifier.isbn9747604833
dc.identifier.urihttp://hdl.handle.net/20.500.12066/4379
dc.description.abstractOne hundred and eighty-five samples of phytoplankton were collected from 58 stations in the Vietnamese waters during 30 April – 29 May 1999 to investigated species composition, abundance and distribution in the thermocline layer compared with those in the surface layer. The samples were taken from surface, thermocline depth and chlorophyll maximum depth. In this study, thermocline depth and chlorophyll maximum depth were included in the thermocline layer. Three hundred and fifty- seven taxa, composed of 2 species of blue green alga, 159 species of diatoms and 161 species of dinoflagellates, were identified. The occurrence of species in each layer were recorded. The cell densities at chlorophyll maximum depth were highest among the sampling depths observed in most stations of the survey. Data obtained from the samples collected from surface to 150 m with 25 m interval to study vertical distribution indicates that maximum cell density of the water column presented between 60 – 110 m. The most abundance was 179,386 cells/l found at chlorophyll maximum depth near the Ca Mau Cape due to the bloom of many diatom species. Oscillatoria ( Trichodesmium ) erythraea, Proboscia alata, Pseudosolenia calcar-avis and Thalassionema frauenfeldii were dominant at all sampling depths. Five species of diatoms presented as dominant species only in the thermocline layer. Alexandrium was frequently found at surface through chlorophyll maximum depth in the south. Diversity and evenness indices of all sampling depths were high in the Gulf of Tonkin and decreased through the south of Vietnam. These indices were high in the thermocline layer.en
dc.language.isoenen
dc.publisherSecretariat, Southeast Asian Fisheries Development Centeren
dc.subjectPseudosolenia calcar-avis
dc.subjectAlexandrium
dc.subjectThalassionema frauenfeldii
dc.subjectProboscia alata
dc.subjectOscillatoria erythraea
dc.subjectOscillatoria
dc.subjectViet Namen
dc.subjectSouth China Seaen
dc.titleSpecies composition, abundance and distribution of phytoplankton in the thermocline layer in the South China Sea, Area IV: Vietnamese watersen
dc.typeConference paperen
dc.citation.spage292
dc.citation.epage309
dc.subject.asfaGeographical distributionen
dc.subject.asfaCommunity compositionen
dc.subject.asfaAbundanceen
dc.subject.asfaCheck listsen
dc.subject.asfaPhytoplanktonen
dc.subject.asfaThermoclineen
dc.subject.asfaAlgaeen
dc.citation.conferenceTitleProceedings of the Fourth Technical Seminar on Marine Fishery Resources Survey in the South China Sea, Area IV: Vietnamese Waters, 18-20 September 2000en


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