Ciclo anual del nitrogeno y el fósforo en el embalse Paso Bonito, Cienfuegos, Cuba

Abstract

Nitrogen and phosphorus annual cycle in the Paso Bonito reservoir (Cienfuegos, Cuba)The Paso Bonito reservoir is a source of supply for the city of Cienfuegos and part of the city of Santa Clara. Concentrations of nitrogen and phosphorous in the reservoir and their relationships with the watershed and reservoir management were analyzed on seven dates between September 2006 and November 2007. The reservoir's management was evaluated with respect to water inƀuxes and discharges and the water residence time. In the water column near the reservoir discharge intake the ratio of dissolved inorganic nitrogen to phosphorus indicated that phytoplankton growth was most commonly co-limited by nitrogen and phosphorus or by phosphorus alone. Fifty-two percent of the phosphorous measurements classiſed the reservoir as eutrophic. Only N-NH 4 and P T concentrations changed signiſcantly with depth. Eighty seven percent of the N-NO 3 values, as well as N-NH 4 during the month of October, indicated water contamination according to the Cuban Regulation used. These results were expected due to watershed and reservoir management. Finally, some issues related to reservoir management are discussed.

Influence of dominant environmental processes in the tropical Cuban basin Hanabanilla and reservoir on sediment composition

“…It is one of the deepest reservoirs in Cuba. Water used for power generation is sent to Paso Bonito dam and used as the water source for the cities of Cienfuegos and Santa Clara and other settlements (Betancourt et al, 2009). The Hanabanilla basin is located within the Arimao River basin and spreads from the extreme southwest of Santa Clara up to the northwest of the Cienfuegos province (Fig.…”

Distribución espacio-temporal de cianobacterias planctónicas y factores ambientales asociados a sus proliferaciones en el embalse Cerrón Grande, El Salvador

“…A nivel ecológico, la presencia de cianobacterias en ecosistemas acuáticos no representa un peligro per se; sin embargo, bajo condiciones ambientales favorables de disponibilidad de luz solar, temperatura, pH (Chorus & Welker, 2021) y enriquecimiento del agua con nutrientes provenientes de actividades antrópicas, estos organismos pueden alcanzar altas densidades celulares aumentando el grado de eutrofia del sistema (Fraile et al, 1995;González et al, 2003;Vásquez et al, 2006). Por otro lado, algunas especies de cianobacterias tienen la capacidad de producir toxinas; a nivel mundial diversos autores han documentados incidentes de intoxicación relacionados a floraciones de cianobacterias lo que consecuentemente puede llegar a representar un problema de salud pública (Betancourt et al, 2009;Cunha et al, 2013;Lamparelli, 2004;Santiago & Vignatti, 2009;Vasconcelos, 2006). A pesar de que las floraciones de cianobacterias se presentan a nivel mundial, la mayoría de los estudios publicados se centran en las toxinas y floraciones de cianobacterias en climas templados, habiendo mucho menos trabajos reportados en áreas tropicales y aún menos en la región de Centro América (Mowe, et al, 2015).…”