Variación diurna de la materia orgánica particulada en una laguna . costera del Golfo de California
1997; Vicerractoría Investigación; Volume: 45; Issue: 4 Linguagem: Inglês
ISSN
2215-2075
AutoresAída Martínez López, Ismael Gárate‐Lizárraga,
Tópico(s)Marine and fisheries research
ResumoThree diel cycles of sampling were carried out in February, May, and October 1991 at the mouth of Bahia Concepcion. This was done to describe the diurnal variability of size-fractionated phytoplankton abundance, species composition, pigments, and particulate organic matter (POM) in two depths. These variables show a very marlted monthly variation, with February being the richest perlod in organic particles. Comparing the results obtained in the tbree cycles, we can observe that no significant differenees (p=O.05 %) exist for both sampling levels during February and May. However, temperature, abundanee, and species composition show signifICant differences (p=O.05%) between sampling levels during October. On the other band, our results show a correlation between the irnport and export of organic matter particles during the tide phases. The analysis of varianee ShoWS significant differences (95 % confi denee) in the POM concentrations in the February and October months. In February, the highest concentrations were recorded during the high tide. In October, an inverse condition was observed. The resuIts of these cycles display the influence of the Gulf of California waters flowing into Bahia Concepcion in February bringing in particulate organic matter. During October, an outflow of particles frorn the bay to the ocean was observed. In May an intermedian condi tion was observed.
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