Incidencia de nutrientes y la TSM en proliferación de Dinoflagelados en dos sectores marino - costeros de la Provincia de Santa Elena
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2014
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Debido al desconocimiento del grado de influencia entre los nutrientes y la tem-peratura superficial del mar con los dinoflagelados, se ha considerado estudiar a este grupo por ser de gran importancia para pronosticar eventos naturales conocidos como Mareas Rojas en las costas de la provincia de Santa Elena, realizándose muestreos mensuales en 4 estaciones, ubicadas: tres en el sector de Anconcito y una en la esta-ción fija 10 Millas Costa Afuera de La Libertad desde octubre del 2011 a marzo del 2012.
Colectándose 24 muestras superficiales de fitoplancton, obtenidas con una red de malla filtrante de 55μ, a una velocidad de 2 nudos, para el análisis de los nutrientes (nitrito, nitrato, fosfato y silicato) se colectaron las muestras de agua con la botella Van dorn y fueron analizadas según el método descrito por Strickland y Parsons (1972), estadísticamente se aplicó el análisis de componentes principales, Anova y coeficiente de correlación de Pearson con un intervalo de confianza del 95%, desa-rrollados con el software SSPS V. 19.0. Se identificaron 27 especies de dinoflagelados en el área de estudio, registrándo-se como especies dominantes a Ceratium furca var. furca, Dinophysis caudata y Ce-ratium tripos. La temperatura superficial del mar reportó un máximo 29.5°C en mar-zo y un mínimo de 21.5 °C en octubre. En cuanto a los nutrientes la distribución del silicato fue homogénea en toda el área de estudio, mientras que el nitrito y el nitrato, fueron considerados en una sola concentración de nitrógeno con 1.6 μg-at N/L y el fosfato con una concentración de 0.7 μg-at P/L, siendo estos valores los más altos registrados en la estación 3. El análisis realizado con Anova demostró que no hay diferencias significativas entre las estaciones y fechas de muestreo, mientras que los dinoflagelados fueron considerados el componente principal más importante y el coeficiente de correlación de Pearson entre las diferentes variables registraron baja significancia estadística.
Due to lack the degree of influence between nutrients and the surface tempera-ture of the sea with the dinoflagellates, has considered studying this group to be of great importance to predict known natural events such as red tides off the coast of the province of Santa Elena, performing monthly sampling at 4 stations, located three in Anconcito sector and one in the station 10 miles fixed Offshore Freedom from oc-tober 2011 to march 2012. 24 surface phytoplankton samples obtained with a mesh network 55μ filter, at a speed of 2 knots, for the analysis of nutrients (nitrite, nitrate, phosphate and silicate) were colecting water samples were collected with the bottle Van dorn and analyzed according to the method described by Strickland and Parsons (1972), statistically the principal component analysis, ANOVA and correlation coefficient of Pearson with a confidence interval of 95%, developed software was applied SSPS V. 19.0. 27 dinoflagellate species were identified in the study area, by registering domi-nant species was Ceratium furca var. furca, Dinophysis caudata and Ceratium tripos as. The sea surface temperature reported a maximum 29.5 °C in march and a mini-mum of 21.5 °C in october. As nutrient distribution silicate was homogeneous throughout the survey area, while the nitrite and nitrate were considered in a single concentra-tion of nitrogen with 1.6 ug -at N/L and the phosphate with a concentra-tion of 0.7 ug -at P/L, being these the highest values recorded at station 3. The analy-sis performed by ANOVA showed no significant differences between the stations and sampling dates, while dinoflagellates have been considered the most important main component and the Pearson correlation coefficient between variables recorded low statistical significance.
Due to lack the degree of influence between nutrients and the surface tempera-ture of the sea with the dinoflagellates, has considered studying this group to be of great importance to predict known natural events such as red tides off the coast of the province of Santa Elena, performing monthly sampling at 4 stations, located three in Anconcito sector and one in the station 10 miles fixed Offshore Freedom from oc-tober 2011 to march 2012. 24 surface phytoplankton samples obtained with a mesh network 55μ filter, at a speed of 2 knots, for the analysis of nutrients (nitrite, nitrate, phosphate and silicate) were colecting water samples were collected with the bottle Van dorn and analyzed according to the method described by Strickland and Parsons (1972), statistically the principal component analysis, ANOVA and correlation coefficient of Pearson with a confidence interval of 95%, developed software was applied SSPS V. 19.0. 27 dinoflagellate species were identified in the study area, by registering domi-nant species was Ceratium furca var. furca, Dinophysis caudata and Ceratium tripos as. The sea surface temperature reported a maximum 29.5 °C in march and a mini-mum of 21.5 °C in october. As nutrient distribution silicate was homogeneous throughout the survey area, while the nitrite and nitrate were considered in a single concentra-tion of nitrogen with 1.6 ug -at N/L and the phosphate with a concentra-tion of 0.7 ug -at P/L, being these the highest values recorded at station 3. The analy-sis performed by ANOVA showed no significant differences between the stations and sampling dates, while dinoflagellates have been considered the most important main component and the Pearson correlation coefficient between variables recorded low statistical significance.
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FITOPLANCTON, ESPECIES, HOMOGÉNEA, FLORECIMIENTOS