Composición y distribución fitoplanctónica en aguas ecuatorianas y su relación con los parámetros físicoquímicos en octubre del 2005
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2008
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El presente trabajo de investigación fue realizado, basado en muestras recolectadas de fitoplancton durante el crucero, CO-II-05 a bordo del BAE “ORION”, del Instituto Oceanográfico de la Armada (INOCAR) durante Octubre, 2005. En este estudio se analizaron 36 muestras de fitoplancton, correspondientes a 18 estaciones completas a lo largo del mar ecuatoriano, ubicadas en varias transectas. Las muestras colectadas fueron efectuadas mediante arrastres superficiales; empleando una red cónica simple con poro de malla de 55 O. Se realizó, un estudio taxonómico de las especies de fitoplancton, para determinar la composición, distribución y abundancia relativa. Se identificaron un total de 41 familias, 58 géneros y 163 especies, pertenecientes a 5 grupos(G): Diatomeas (Centrales y Pennadas), Dinoflagelados, Cyanophytas, Tintinnidos y Fitoflagelados. El grupo que predominó en toda el área de estudio fueron las Diatomeas céntricas. Las especies encontradas durante todo el estudio de acuerdo a la bibliografía citada han sido relacionadas a las características de las distintas masas de agua definiéndolas como: Aguas Ecuatoriales del Frente Ecuatorial con (23 especies), Aguas Costeras peruanas de la Corriente del Humboldt (9 spp.) y Aguas tropicales superficiales de la Corriente del nino (7 spp). Mediante el análisis Cluster se pudo determinar que existe una relación directa de los parámetros fisicos-quimicos frente a la composición y distribución del fitoplancton. Se pudo determinar por medio del análisis Cluster, que el agrupamiento de las diferentes estaciones frente a los parámetros físicos-químicos evidencio una relación directa influyendo en la diversidad fitoplanctónica de las especies, en relación a las masas de agua tipificadas en el presente estudio.
The present research was conducted, based on phytoplankton samples collected during the cruise, CO-II-05 BAE aboard the "ORION", the Oceanographic Institute of the Navy (INOCAR) in October, 2005. In this study we analyzed 36 samples of phytoplankton, for 18 full seasons along the Ecuadorian sea, several transects. The collected samples were conducted using surface trawls, using a simple conical net of 55 mesh pore O. We performed a taxonomic study of the phytoplankton species, to determine the composition, distribution and relative abundance. We identified a total of 41 families, 58 genera and 163 species, belonging to 5 groups (G): Diatoms (Central and pennate), dinoflagellates, Cyanophytas, Tintinnidos and phytoflagellates. The predominant group throughout the study area were the central Diatoms. The species found throughout the study according to the literature cited have been related to the characteristics of the different water masses defining them as: Equatorial Waters Equatorial Front (23 species), Peruvian Coastal Waters of the Humboldt Current (9 spp .) and shallow tropical waters of the current child (7 spp). By cluster analysis it was determined that there is a direct physical-chemical parameters versus composition and distribution of phytoplankton. It was determined by cluster analysis, that the grouping of the various stations meet the physical-chemical parameters showed a direct influencing phytoplankton species diversity, relative to water masses in the present study typified
The present research was conducted, based on phytoplankton samples collected during the cruise, CO-II-05 BAE aboard the "ORION", the Oceanographic Institute of the Navy (INOCAR) in October, 2005. In this study we analyzed 36 samples of phytoplankton, for 18 full seasons along the Ecuadorian sea, several transects. The collected samples were conducted using surface trawls, using a simple conical net of 55 mesh pore O. We performed a taxonomic study of the phytoplankton species, to determine the composition, distribution and relative abundance. We identified a total of 41 families, 58 genera and 163 species, belonging to 5 groups (G): Diatoms (Central and pennate), dinoflagellates, Cyanophytas, Tintinnidos and phytoflagellates. The predominant group throughout the study area were the central Diatoms. The species found throughout the study according to the literature cited have been related to the characteristics of the different water masses defining them as: Equatorial Waters Equatorial Front (23 species), Peruvian Coastal Waters of the Humboldt Current (9 spp .) and shallow tropical waters of the current child (7 spp). By cluster analysis it was determined that there is a direct physical-chemical parameters versus composition and distribution of phytoplankton. It was determined by cluster analysis, that the grouping of the various stations meet the physical-chemical parameters showed a direct influencing phytoplankton species diversity, relative to water masses in the present study typified
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COMPOSICIÓN, DISTRIBUCIÓN, FITOPLANCTON, PARÁMETROS FÍSICO QUÍIMICOS