Abstract
The purpose of this work was to characterize the phytoplankton community of San Quintín Bay using pigment concentrations from HPLC and the CHEMTAX program, so that small cells (< 5 µm) would not be excluded. On 23–24 April 2001, a 24-h time series was generated, sampling surface water every hour. Samples were also taken from six localities throughout the bay. There was a significant contribution of seven phytoplankton groups. Those that contributed the most to total chlorophyll a were cryptophytes, cyanobacteria, bacilliarophytes and chlorophytes. In general, pigment concentrations were higher in the mouth region and decreased towards the internal extremes. This is the first report of the presence of the pigment divinyl chlorophyll a in San Quintín Bay, which firmly suggests the presence of Prochlorococcus sp. This group contributed up to 40% of the total chlorophyll a. Other cyanobacteria contributed up to 13% of the total chlorophyll a. These percentages are indicative of a very high abundance of these groups.
Highlights
Durante los últimos 30 años se ha reconocido a Bahía SanQuintín, México, por su actividad ostrícola
This is the first report of the presence of the pigment divinyl chlorophyll a in San Quintín Bay, which firmly suggests the presence of Prochlorococcus sp
This study aims to characterize the phytoplankton community of San Quintín Bay based on pigment analysis and the chemical taxonomy program (CHEMTAX), so as not to exclude small cells
Summary
Durante los últimos 30 años se ha reconocido a Bahía San. Quintín, México, por su actividad ostrícola. Este tipo de estudios han sido escasos (Lara-Lara et al, 1980; Millán-Núñez et al, 1982; Silva-Cota y Álvarez-Borrego, 1988). Lara-Lara et al (1980) reportaron que las diatomeas fueron más abundantes en la boca que en los interiores de la bahía. Millán-Núñez et al (1982) reportaron que las diatomeas fueron más abundantes sólo durante eventos de intensificación de surgencias en la boca, seguido de mayor abundancia de dinoflagelados durante los períodos de relajamiento. No obstante la gran proporción de células menores a 10 μm, no se han realizado estudios que evalúen su abundancia en Bahía San Quintín
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