Parámetros abióticos y su relación con la abundancia del fitoplancton frente a Puerto López-Ecuador (2011-2012)
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2015
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El presente estudio evaluó la incidencia de los parámetros abióticos en la abundancia del fitoplancton a profundidades estándares de la columna de agua en una estación ubicada a 10 millas costa afuera frente a Puerto López (01°35.4 S – 080°59.4 O) durante el 2011 y 2012. Para lo cual se realizó la identificación taxonómica y cuantificación de especies fitoplanctónicas, así como determinación de temperatura y nutrientes (nitrito, nitrato, fosfato y silicato).
De manera general el fitoplancton presento variaciones en la abundancia y distribución, siendo sus valores inferiores a lo establecido como promedio para esta zona del mar ecuatoriano con mayor actividad celular entre la superficie y 10 m de profundidad, siendo Nitzschia longissima y Cylindrotheca closterium, las especies que tipifican a la comunidad fitoplanctónica en función de las abundancias registradas.
Los resultados obtenidos fueron validados estadísticamente mediante: Prueba no paramétrica Kruskal Wallis, análisis de correspondencia canónica (ACC) y rangos de correlación de Spearman.
Las relaciones entre el fitoplancton y las condiciones oceanográficas existentes determinaron que las especies: Dactyliosolen fragilissimus, Pseudo-nitzschia complejo seriata y Leptocylindrus danicus tuvieron una correlación fuerte con los nutrientes (nitrito, nitrato y silicato), siendo el segundo y tercer nutriente quienes intervinieron positivamente en el crecimiento de L. danicus durante 2011, mientras que para el segundo año las especies Cylindrotheca closterium y Pseudo-nitzschia complejo seriata obtuvieron una correlación fuerte e inversa con la temperatura y directa con los nutrientes, específicamente muy fuerte con el nitrito y fuerte con nitrato, fosfato y silicato.Los índices bióticos frente a Puerto López determinaron mayor heterogeneidad de especies dando lugar a un ambiente favorable y de condiciones constantes, principalmente para el segundo año analizado en tanto la hipótesis planteada en este estudio fue aceptada al observar que las variables ambientales influyeron en la abundancia del fitoplancton.
This study evaluated the impact of abiotic parameters in phytoplankton abundance at standard depths of the water column at a station located 10 miles offshore in front of Puerto Lopez (01 ° 35.4 S - 080 ° 59.4 W) in 2011 and 2012. To this, a taxonomic identification and quantification of phytoplankton species was performed and determining temperature and nutrients (nitrite, nitrate, phosphate and silicate). Phytoplankton featured variations in abundance and distribution, being this values, he lower registered for this area of the Ecuadorian sea with increased cell activity between the surface and 10 m depth, being Nitzschia longissima and Cylindrotheca closterium , species that typify the phytoplankton community in terms of abundance and permanence registered. The results were validated statistically by: Kruskal-Wallis nonparametric test, canonical correspondence analysis (CCA) and Spearman rank correlation. The relationships between the phytoplankton and existing oceanographic conditions determined that species Dactyliosolen fragilissimus , Pseudo-nitzschia seriata complex and Leptocylindrus danicus had a strong correlation with the nutrients (nitrite , nitrate and silicate) , the second and third nutrient showed positive influence in the growth of L. danicus in 2011 , while for the second year Cylindrotheca closterium species and Pseudo-nitzschia seriata complex and showed strong inverse correlation with temperature and direct with nutrients, specifically strong with nitrite and strong with nitrate, phosphate and silicate.Biotic indices in Puerto Lopez determined greater heterogeneity of species resulting in a favorable environment and constant conditions, especially for the second year analyzed observing that the hypothesis of this study was accepted by observing that environmental variables influenced the abundance of phytoplankton.
This study evaluated the impact of abiotic parameters in phytoplankton abundance at standard depths of the water column at a station located 10 miles offshore in front of Puerto Lopez (01 ° 35.4 S - 080 ° 59.4 W) in 2011 and 2012. To this, a taxonomic identification and quantification of phytoplankton species was performed and determining temperature and nutrients (nitrite, nitrate, phosphate and silicate). Phytoplankton featured variations in abundance and distribution, being this values, he lower registered for this area of the Ecuadorian sea with increased cell activity between the surface and 10 m depth, being Nitzschia longissima and Cylindrotheca closterium , species that typify the phytoplankton community in terms of abundance and permanence registered. The results were validated statistically by: Kruskal-Wallis nonparametric test, canonical correspondence analysis (CCA) and Spearman rank correlation. The relationships between the phytoplankton and existing oceanographic conditions determined that species Dactyliosolen fragilissimus , Pseudo-nitzschia seriata complex and Leptocylindrus danicus had a strong correlation with the nutrients (nitrite , nitrate and silicate) , the second and third nutrient showed positive influence in the growth of L. danicus in 2011 , while for the second year Cylindrotheca closterium species and Pseudo-nitzschia seriata complex and showed strong inverse correlation with temperature and direct with nutrients, specifically strong with nitrite and strong with nitrate, phosphate and silicate.Biotic indices in Puerto Lopez determined greater heterogeneity of species resulting in a favorable environment and constant conditions, especially for the second year analyzed observing that the hypothesis of this study was accepted by observing that environmental variables influenced the abundance of phytoplankton.
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FITOPLANCTON, PERMANENCIA, INCIDENCIA, CORRELACION DE SPEARMAN