Distribución de nutrientes en marismas de la Reserva Natural Bahı́a San Blas
Keywords:
agua subterranea, humedales costeros, marismas, nutrientes solubles, agua superficialAbstract
Las marismas constituyen uno de los principales humedales costeros cuyo funcionamiento hidrológico está ı́ntimamente ligado a los flujos mareales. Uno de los principales servicios ecosistémicos de estos humedales es la regulación del contenido de macro y micronutrientes. La Reserva Natural Bahı́a San Blas es un área protegida que comprende ambientes de planicies intermareales asociados a ambientes de marismas producto de la evolución geomorfológica del área durante el Cuaternario. La hidrologı́a del área está condicionada tanto por los aportes desde flujos mareales como por las variables climáticas asociadas a la evapotranspiración. El objetivo del trabajo fue caracterizar la distribución de nutrientes en las planicies intermareales asociadas a ambientes de marismas. Se diseñó una red de monitoreo que comprende puntos de muestreo de agua superficial y subterránea somera ubicados en los distintos sectores del humedal (planicie intermareal y zonas adyacentes a esta) y agua de mar. Durante el muestreo se determinó en campo el pH y conductividad eléctrica (CE) del agua con un equipo portátil. En las muestras extraı́das se determinó el contenido de fósforo total (Pt), fósforo reactivo soluble (Ps), nitrato (NO3-), nitrito (NO2-) y amonio (NH4+). Los resultados expuestos evidencian que el humedal costero constituye un ambiente intermareal con marismas asociadas donde los aportes de N y P derivarı́an no solo de fuentes antrópicas sino también de fuentes naturales como la atmosférica y la degradación de la materia orgánica propia del ambiente y en el caso de la marisma y planicie fangosa también del flujo mareal y descarga de agua subterránea. Los resultados obtenidos constituyen una base de datos de importancia para la gestión de estas áreas de humedales costeros que alojan reservas naturales.
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Copyright (c) 2025 Julieta Galliari, Carolina Tanjal, Francisco Cellone, Rosario Acosta, María del Pilar Alvarez, Eleonora Carol
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