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dc.contributor.advisorCarreto, J.I.
dc.contributor.authorAkselman, R.
dc.coverage.spatialArgentina , Patagonia , Santa Cruz , Golfo San Jorge
dc.date.accessioned2007-02-02T14:03:04Z
dc.date.available2007-02-02T14:03:04Z
dc.date.issued1996
dc.identifier.urihttp://hdl.handle.net/1834/1464
dc.description.abstractThis study was based on four seasonal cruises during 1984 and 1985. It revealed a thermo-haline frontal system formed by the advection of the Coastal Water mass flowing in two branches, one running towards the coast and the other mid-shelf directed. The thermocline developed between late spring and autumn results in a low inorganic nutrient concentration in the upper layer. Nonetheless in winter, a vertical homogeneity and high nutrient concentration were observed. Phytoplankton development presented a typical temperate-seas annual cycle. In winter, reduced populations were dominated by diatoms. The highest biomass concentration in the cycle coincided with the spring blooming, to which Thalassio sira anguste-lineata,Alexandrium tamarense, Heterocapsa triquetra and Prorocentrum micans were associated. Summer concentration decreased sharply with dinoflagellates being dominant, and a minor increase followed in autumn owing to diatom populations. Usually diatom growth was linked to the frontal region. The quali-quantitative flora composition denote this gulf as a southern transitional area with a dominance of temperate-cold communities. A high dinoflagellate cysts richeness and encystment were detected in spring. Trophic relations in the microplankton community were identified, and a spatial coupling of predator-dinoflagellates and photosynthetic prey-dinoflagellates was noted. Consumption and grazing and prey selectivity indexes were also estimated.en
dc.description.sponsorshipUniversidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales.
dc.format.extent1409859 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoes
dc.titleEstudios ecológicos en el Golfo San Jorge y adyacencias (Atlántico sudoccidental). Distribución, abundancia y variación estacional del fitoplancton en relación a factores físico-químicos y la dinámica hidrológica.es
dc.title.alternativeEcological studies in San Jorge Gulf and adjacent areas (SW Atlantic). Phytoplankton distribution, abundance and seasonal variation in relation to physico-chemical factors and hydrology.en
dc.typeTheses and Dissertations
dc.description.notesTesis (Doctorado). Copia en PDF: portada, índice, resumen, referencias bibliográficas.
dc.description.otherfitoplancton , abundancia , relaciones tróficas , quistes , variación estacional , efectos ambientales
dc.format.pages234pp.
dc.subject.agrovocPhytoplanktonen
dc.subject.agrovocCystsen
dc.subject.asfaPhytoplanktonen
dc.subject.asfaAbundanceen
dc.subject.asfaTrophic relationshipsen
dc.subject.asfaCystsen
dc.subject.asfaSeasonal variationsen
dc.subject.asfaSeasonal thermoclineen
dc.subject.asfaPlankton surveysen
dc.subject.asfaEnvironmental effectsen
refterms.dateFOA2021-01-30T18:47:52Z


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