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Volume 37- Number 1 - 2002

Composition, Distribution and Abundance of the Utría Inlet Phytoplankton Community, Colombian Pacific

Viviana Peña1 & Gabriel A. Pinilla2


(1) Universidad Jorge Tadeo Lozano
(2) Universidad Jorge Tadeo Lozano, Centro de Investigaciones Científicas y Estudios Ambientales, Calle 22 3-30 P.8. Bogotá, Colombia



With the purpose of characterising the composition, distribution and abundance of the phytoplankton community of the cove of Utría, samples from three stations (two coastal and one with oceanic influence) and three depths (surface, Secchi and compensation depths), as much as diurnal and nocturnal were collected, during the months of July, August and October of 1995 and February and July of 1996. 218 species were identified, 137 were diatoms, 73 dinoflagellates, 5 cyanophytes and 3 silicoflagellates. Within this community appeared estuarine, coastal and oceanic species. Main differences occurred between samplings, while stations, depths and day-night changes were less marked. Entrances of the continental and marine waters, tide regime and washing of beaches, especially from the mangrove zones, probably caused these differences.


Key words: ecology, marine algae, coastal phytoplankton

1Laboratorio de Zooplancton, Instituto de Ciencias del Mar y Limnología,Universidad Nacional Autónoma de México. A. P. 70-305, 04510 México, D. F. México
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