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  • 1
    Publication Date: 2021-05-19
    Description: Se presentan los resultados de la distribución cuantitativa y cualitativa del fitoplancton enfatizado en diatomeas y dinoflagelados y las condiciones ambientales observadas en la cuenca pacífica colombiana entre enero y febrero de 2007 en dos profundidades de muestreo (superficie y 50 m). Se presentó predominio en abundancia de las diatomeas sobre los dinoflagelados. Los valores de abundancia en diatomeas a nivel superficial estuvieron entre 456 y 1109 888 células L-1, mientras que a 50 m oscilaron entre los 740 y 143 008 células L-1; para los dinoflagelados los valores estuvieron entre los 95 a 2071 células L-1 en superficie y entre 19 y 435 células L-1, para los 50 m de profundidad. En diatomeas, tanto superficialmente como a 50 m de profundidad, los taxones predominantes por su mayor abundancia y frecuencia fueron Chaetoceros, Pseudo-nitzschia, Leptocylindrus y Cylindrotheca; mientras que para los dinoflagelados lo fueron Oxytoxum y Gymnodinium. Estos resultados se dieron en condiciones ambientales que se caracterizaron por manifestar aún la presencia de la fase cálida de El Niño 2006-2007 aunque en rápida declinación, junto con características estacionales de eventos de surgencia.
    Description: The results of the analysis of the quantitative and qualitative distribution of the phytoplankton emphasized in diatoms and dinoflagellates and environmental conditions observed in the Colombian Pacific basin between January and February of 2007 appear, during the development of Oceanographic Cruise PACIFIC XLIV-ERFEN XLII, in 25 stations and two depths of sampling (surface and 50m) are presented. A strong predominance in abundance of the diatoms appeared over the dinoflagellates ones. The values of abundance in diatoms at surface were between 456 and 1 109 888 cells L-1, whereas at 50 m they oscillated between the 740 and 143 008 cells L-1; for dinoflagellates the values were between the 95 to 2 071 cells L-1 in surface and between 19 and 435 cells L-1 for the 50 m depth. In diatoms, taxa predominant in abundance and frequency at both depths were Chaetoceros, Pseudo-nitzschia, Leptocylindrus and Cylindrotheca; for the dinoflagellates, taxa predominant in abundance and frequency at both depths were Oxytoxum and Gymnodinium. The environmental conditions were characterized still for the presence of the warm phase of the El Niño phenomena 2006-2007, and the seasonal characteristics related to upwelling events.
    Description: Published
    Keywords: Diatomeas ; Dinoflagelados ; Fitoplancton ; Surgencia ; ERFEN ; Oceanografía ; ASFA_2015::P::Physical oceanography ; ASFA_2015::M::Marine biology
    Repository Name: AquaDocs
    Type: Journal Contribution , Not Known
    Format: Pp.105-122
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