Estudio de las comunidades del fitoplancton y zooplancton en Monteverde, Península de Santa Elena, Ecuador durante noviembre de 2006
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Estudio de las comunidades del ...
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Date
2009
Metadatos
Mostrar el registro completo del ítemAbstract
El presente estudio se efectuó frente a la localidad de Monteverde, Península de Santa Elena, monitoreándose un total de 15 estaciones durante los estados de marea de flujo y reflujo en noviembre de 2006. Las mayores concentraciones de clorofila a: Se observó en la estación 9 en la capa superficial con valores de 0.90 mg/m3 determinándose como un área de mayor productividad y la menor concentración se registró en la estación 4 con valor de 0.10 mg/m3 durante la fase de flujo. En la comunidad fitoplanctónica se determinó dos áreas de mayor diversidad y abundancia de especies: La primera se observó en las estaciones 4 y 6 durante flujo registrándose la mayor abundancia relativa, la segunda corresponde a las estaciones 10 y 11 en reflujo. Se destaca la dominancia de la especie Chaetoceros coarctatus y asociada a esta se observaron las especies Leptocylindrus danicus, Rhizosolenia imbricata, Chaetoceros affinis, Coscinodiscus excentricus, que constituyen el grupo de las Diatomeas, por lo tanto se consideran como especies que tipifican una mezcla de masas de aguas frías, neríticas que en términos generales su abundancia se considera normal para la época actual. En la comunidad de zooplancton se determinó que las mayores concentraciones de zooplancton se registraron en la estación 3 durante reflujo. En las estaciones en estudio se observó un total de 21 grupos de zooplancton, siendo los grupos dominantes los Copépodos, radiolarios, Zoeas de brachiuras, Quetognatos representados por el género Sagitta sp., Cladóceros representados por la especie P. avirrostris grupos que fueron comunes durante flujo y reflujo.The present study was made in front of the town of Monteverde, Peninsula of Santa Elena, the stations were distributed along 5 transects, with a total of 15 stations within which the of flow and reflux tides were monitored in november of 2006. The largest concentrations of chlorophyll a were observed at station 9 in the superficial layer with values of 0.90 mg/m3, indicating an area of higher productivity. The smallest concentration was measured at station 4 with a value of 0.10 mg/m3 during the phase of flow. Two areas of enhanced diversity and abundance were identified within the phytoplankton community. The first area of greatest relative abundance was observed at stations 4 and 6 during, and the second area correspond to stations 10 and 11 in reflux. The dominance of the species Chaetoceros coarctatus was the dominant species, though several species associated with its presence, including Leptocylindrus danicus, Rhizosolenian imbricata, Chaetoceros affini, Coscinodiscus excentricus, all of which constitute the group of the Diatoms. These species characterize a mixture of cold and nerític waters, and in general terms their abundance is considered normal for the present time. within the zooplankton community, the largest zooplankton concentrations were measured at station 3 during the phase reflow. At stations in this study a total of 21 zooplankton groups were identified. The dominant and most frequently observed groups were Copepods, Radiolarians, Brachyurans Zoeas, Chaetognaths represented by the genue Sagitta sp., invertebrates eggs, and Cladocera represented by the species P. avirrostris groups that were common during flow and reflux.
Journal
Acta oceanográfica del PacíficoVolume
15Issue/Article Nr
1Publisher or University
Instituto Oceanográfico de la ArmadaColecciones