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| Format: | Artículo científico |
| Langue: | es |
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Universidad de Valparaíso
2014
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| Accès en ligne: | https://www.redalyc.org/articulo.oa?id=47931255011 |
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Table des matières:
- Condiciones ambientales durante un florecimiento de Cochlodinium polykrikoides (Gymnodiniales, Dinophyceae) en la Ensenada de La Paz, Golfo de California David J. López-Cortés Christine J. Band-Schmidt José J. Bustillos-Guzmán Francisco E. Hernández-Sandoval Armando Mendoza-Flores Erick J. Núñez-Vázquez Ciencias de la Tierra bloom Key words Gulf of California Cochlodinium polykrikoides Environmental conditions are described during a bloom of Cochlodinium polykrikoides that occurred between September 12 th and November 9 th 2012, in Ensenada de La Paz, Gulf of California. At the beginning of the bloom, the number of cells, chlorophyll a , and peridinin was 6.2 x10 2 cells mL -1 , 10.1 mg m -3 , and 3.5 mg m -3 , respectively; 8.6 x 10 3 cells mL -1 , 121.2 mg m -3 and 40.2 mg m -3 in their maximum intensity; and 5 cells mL -1 , 1.02 mg m -3 of chlorophyll a , and 0.03 mg m -3 of peridinin, at the end of the bloom period. Thermal interval fluctuated between 30.3 and 31.3 °C; salinity varied from 35.2 to 36.8; dissolved O 2 ranged from 4.8 to 10.8 mL L -1 ; saturation percentage was > 200. The values of nitrate, phosphate, and the N:P ratio at the initiation of the bloom were 1.8, 0.9 ( μ M) and 2.8, during the maximum intensity they were 8.5, 3.4 ( μ M), and 2.9. At the end of the bloom they were 5.3, 0.6 ( μ M) and 9.0. Prevailing winds were from the NNE (0.4-5.0 m s -1 ), and a precipitation of 68 mm was registered previous to the bloom event. As winds diminished < 1.3 m s -1 on to SSE direction, the blooming got more intense. According to this information, we concluded that the NNE winds and continental runoff caused by rain fertilized Ensenada de La Paz waters, created conditions to support growth and survival of C. polykrikoides . Mortality of marine organisms was not observed during this event. 2014 artículo científico 0717-3326 https://www.redalyc.org/articulo.oa?id=47931255011 es http://www.redalyc.org/revista.oa?id=479 Revista de Biología Marina y Oceanografía application/pdf Universidad de Valparaíso Revista de Biología Marina y Oceanografía (Chile) Num.1 Vol.49