Ciclo anual de Fitoplancton de la parte norte del Golfo de Nicoya, Costa Rica
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Date
1999
Authors
Vega Bolaños, Hannia
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad Nacional (Costa Rica)
Abstract
Se analizó el ciclo anual del fitoplancton de la parte interna del Golfo de Nicoya durante el periodo de julio 1991. La mayor abundancia de células fue observada en época lluviosa y se localizó en las estaciones alrededor de la Isla de Chira. Las especies que presentaron una mayor distribución en el golfo fueron Cylindrotheca closterium, Skeletonema costatum y Nitzschia pungens. Floraciones de Mesodinium rubrum (ciliado no-tóxico) fueron observadas en octubre, así como el incremento significativo de Gymnodinium catennatum (potencialmente tóxico). A través de un análisis de conglomerados se definieron tres zonas en la parte alta del Golfo: 1) Estaciones cercanas a la Isla de Chira, que se caracterizan por ser ricas en nutrientes, altas concentraciones de fitoplancton y baja diversidad. 2) Estaciones cercanas a la Isla San Lucas y Puntarenas que presentaron menor concentración de nutrientes, menores concentraciones de fitoplancton, mayor diversidad y alta salinidad. 3) Estaciones que en dependencia de las mareas y las corrientes, comparten características con la zona 1 o 2.
The annual cycle of phytoplankton in the inner part of the Gulf of Nicoya was analyzed during the period of July 1991. The highest abundance of cells was observed in the rainy season and was located in the stations around Chira Island. The species with the greatest distribution in the gulf were Cylindrotheca closterium, Skeletonema costatum and Nitzschia pungens. Blooms of Mesodinium rubrum (non-toxic ciliate) were observed in October, as well as the significant increase of Gymnodinium catennatum (potentially toxic). Through a cluster analysis, three zones were defined in the upper part of the Gulf: 1) Stations near Chira Island, which are characterized by being rich in nutrients, high concentrations of phytoplankton and low diversity. 2) Stations near Isla San Lucas and Puntarenas that presented lower concentration of nutrients, lower concentrations of phytoplankton, greater diversity and high salinity. 3) Stations that, depending on the tides and currents, share characteristics with zone 1 or 2.
The annual cycle of phytoplankton in the inner part of the Gulf of Nicoya was analyzed during the period of July 1991. The highest abundance of cells was observed in the rainy season and was located in the stations around Chira Island. The species with the greatest distribution in the gulf were Cylindrotheca closterium, Skeletonema costatum and Nitzschia pungens. Blooms of Mesodinium rubrum (non-toxic ciliate) were observed in October, as well as the significant increase of Gymnodinium catennatum (potentially toxic). Through a cluster analysis, three zones were defined in the upper part of the Gulf: 1) Stations near Chira Island, which are characterized by being rich in nutrients, high concentrations of phytoplankton and low diversity. 2) Stations near Isla San Lucas and Puntarenas that presented lower concentration of nutrients, lower concentrations of phytoplankton, greater diversity and high salinity. 3) Stations that, depending on the tides and currents, share characteristics with zone 1 or 2.
Description
Vega Bolaños, H. (1999). Ciclo anual de Fitoplancton de la parte norte del Golfo de Nicoya, Costa Rica. [Tesis de Licenciatura]. Universidad Nacional, Costa Rica.
Keywords
FITOPLANCTON, BIOLOGIA MARINA, MARINE BIOLOGY, GOLFO DE NICOYA (COSTA RICA)