La laguna urbana Parque “Juan de Garay” es un espacio recreativopara los habitantes de la ciudad de Santa Fe. Se realizaron muestreosen cinco sitios de la laguna en cada estación del año registrando: pro-fundidad, oxígeno disuelto, transparencia del agua, temperatura, pH,conductividad eléctrica, nutrientes e iones; fitoplancton y bacterias.Se identificaron y cuantificaron muestras bacteriológicas medianteel recuento de microorganismos aerobios y anaerobios facultativos ymesófilos viables (RAT). Se identificaron 86 especies fitoplanctónicas,la mayor riqueza se observó en Chlorophyceae y Bacillariophyceaey mayor densidad en Cyanobacteria y Chlorophyceae. La mayor ri-queza específica y densidad fitoplanctónica se observó durante la es-tación primaveral. Los análisis bacterianos no registraron coliformesfecales ni Escherichia coli. El valor de saprobiedad determinó nivel β(beta–mesosaprobio), donde el agua presentó contaminación mo-derada y la presencia de grupos algales como Chlorophyceae, Cya-nobacteria y Bacillariophyceae. El diagnóstico permitió identificar enqué estado de saprobiedad está la laguna urbana “Parque Juan deGaray” y obtener información útil para el mejor manejo de éste siste-ma, posterior a su restauración en el 2009.
The province of Córdoba, located in the central region of Argentina, is subdivided into two areas: a hilly area to the west and a plain to the east. The fl uvio-lacustrine systems developed in these areas form both exorheic and endorheic basins. The phytoplankton dynamics of these basins is determined mainly by their physicochemical and hydrological features and the succession of dry and wet periods. In addition to these factors, there are allochthonous impacts caused by the human activities developed in the area of infl uence. This article describes the phytoplankton from the exorheic river systems of Tercero and Cuarto Rivers, the endorheic rivers Tegua, Chucul and Santa Catalina, and urban (Villa Dalcar and Parque Sarmiento) and natural Suco shallow lake lentic systems.
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