%0 Journal Article
%T Productividad primaria del fitoplancton en la bah¨ªa de Mochima, Venezuela Primary productivity of phytoplankton in Mochima Bay, Venezuela
%A Federico Gonz¨¢lez
%A Evelyn Zoppi de Roa
%A Edie Montiel
%J Investigaciones Marinas
%D 2006
%I 
%X Se analizaron las fluctuaciones temporales y espaciales de los par¨¢metros f¨ªsicos, qu¨ªmicos, clorofila-a y productividad primaria durante periodos de surgencia y no surgencia en la bah¨ªa de Mochima, Venezuela. La columna de agua se dividi¨® en cuatro estratos para determinar los par¨¢metros f¨ªsicos y qu¨ªmicos; y en dos estratos para determinar la clorofila-a y productividad primaria. La productividad primaria en no surgencia vari¨® de 0 a 417 mg C¡¤m-3¡¤h-1 y en surgencia de 76 a 426 mg C¡¤m-3¡¤h-1. La concentraci¨®n de clorofila-a en no surgencia fue de 1,11 a 8,57 mg clor-a¡¤m-3 y en surgencia de 4,21 a 44,59 mg clor-a¡¤m-3. La productividad primaria y la biomasa entre ambos periodos fue elevada, particularmente en surgencia. En ambos periodos los organismos fitoplanct¨®nicos presentaron fuertes cambios temporales intradiarios que se manifestaron de acuerdo a eventos Lasker The temporal and spatial fiuctuations of physical and chemical parameters, chlorophyll-a, and primary productivity were analyzed during periods of upwelling and non-upwelling in Mochima Bay, Venezuela. The water column was divided into four strata for determining the physical and chemical parameters and into two strata for determining chlorophyll-a and primary productivity. Primary productivity varied from 0 to 417 mg C¡¤m-3¡¤h-1 under non-upwelling conditions and from 76 to 426 mg C¡¤m-3¡¤h-1 during upwelling. Chlorophyll-a concentrations ranged from 1.11 to 8.57 mg clor-a¡¤m-3 (non-upwelling) and from 4.21 to 44.59 mg clor-a¡¤m-3 (upwelling). Primary productivity and biomass were elevated under both upwelling and non-upwelling conditions, particularly during upwelling. Sharp, temporal, daily changes were observed in phytoplanktonic organisms under both upwelling and non-upwelling conditions; these changes were manifested according to Lasker events
%K fitoplancton
%K clorofila-a
%K productividad primaria
%K surgencia
%K bah¨ªa de Mochima
%K Venezuela
%K primary productivity
%K phytoplankton
%K biomass
%K upwelling
%K Mochima Bay
%K Venezuela
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782006000200004