Armored dinoflagellates of the Southwestern Atlantic Ocean

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dc.acquisition-srcen_US
dc.call-noQK569.D56 M5 1985 GBAYen_US
dc.contract-noen_US
dc.contributor.authorMcKenzie, C.H.en_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T17:04:21Z
dc.date.available2010-02-15T17:04:21Z
dc.date.issued1985en_US
dc.degreeen_US
dc.description392 p., Dissertationen_US
dc.description-otheren_US
dc.description.abstractThe armored dinoflagellates from net hauls taken from ARA/ISLAS ORCADAS cruises 17-78 and 19-79 were studied using light and scanning electron microscopy. the samples were taken at two different seasons, austral spring and fall, on similar cruise tracks. A list of armored dinoflagellates was compiled from twenty previous cruises in the research area. a survey was made at each of forty ISLAS ORCADAS stations to determine the relative number and species of dinoflagellates present. A total of sixty-four species were identified, including three possibly new species and three species not previously reported in the research area. Through scanning electron microscopic observations more information regarding thecal pores, surface texture, apical pores, cingular and sulcal lists and some cingular sulcal plates was detailed. Species diversity as determined by number of species was also recorded and found to be highest in the Drake Passage and at the more northern oceanic stations north of of South Georgia Island. Protoperidinium and Dinophysis had the most species diversity. Distribution of genera is plotted on a three-dimensional bar graph by station and season. Protoperidinium was the dominant genus particularly in the austral fall; it made up over 80% of the dinoflagellate community at several stations. Dinophysis and Ceratium were the second and third most common genus, respectively. Protoperidinium and Dinophysis were found at almost all stations, but the actual species varied with the region and season. Ceratium was found at the northern stations but was abruptly absent at the stations south of the Polar Front. The chi-square test was used to determine the independence of the genera in relation to the season and region. At a 0.05 alpha level, the species were independent of season, but not independent of region. A cluster analysis was used to find hierarchaical clusters of the stations according to the similarities in species content.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeTexas Coasten_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/21559
dc.latitudeen_US
dc.locationGBIC Collectionen_US
dc.longitudeen_US
dc.notesen_US
dc.placeCollege Station, Texasen_US
dc.publisherTexas A&M University.en_US
dc.relation.ispartofseries3767.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectdinoflagellatesen_US
dc.subjectspecies diversityen_US
dc.subjectseasonal distributionen_US
dc.subjectDinophysis sp.en_US
dc.subjectregionsen_US
dc.subjectcluster analysisen_US
dc.subjectgeographical distributionen_US
dc.subjectgeneticsen_US
dc.subjectcollectionsen_US
dc.titleArmored dinoflagellates of the Southwestern Atlantic Oceanen_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueen_US

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