Papers by Sofía Anaís Brito
Boletín de la Sociedad Chilena de Arqueología, Dec 30, 2023
una publicación fundada en 1984 y editada por la Sociedad Chilena de Arqueología. Desde el año 20... more una publicación fundada en 1984 y editada por la Sociedad Chilena de Arqueología. Desde el año 2022 es de tiraje bianual y tiene como propósito la difusión de avances, resultados, reflexiones y discusiones relativas a la investigación arqueológica nacional y de zonas aledañas. Las opiniones vertidas en este Boletín son de exclusiva responsabilidad de quienes las emiten y no representan necesariamente el pensamiento
Lakes & Reservoirs: Science, Policy and Management for Sustainable Use, 2011
The physical and chemical variables of the water, and the composition and structure of the zoopla... more The physical and chemical variables of the water, and the composition and structure of the zooplankton communities, in Três Marias and Furnas Reservoirs in Minas Gerais, Brazil, were compared to characterize these environments in relation to their trophic state. Higher values of electrical conductivity and chlorophyll-a, total solids, suspended organic matter and total nitrogen concentrations were recorded in Três Marias Reservoir. Higher water transparency and nitrite and nitrate concentrations were observed in Furnas (P < 0.000). Higher zooplankton densities were always obtained in Três Marias Reservoir and, during the rainy period (P < 0.000), with mean values in the dry and rainy periods of 23 721 and 90 872 org m)3 , respectively, in Três Marias Reservoir and 9022 and 40 434 org m)3 , respectively, in Furnas Reservoir. Copepoda was the dominant group in both reservoirs, mainly the younger stages (nauplii and copepodids). Based on the absolute and relative values, the contribution of rotifers was higher in Três Marias Reservoir than in Furnas Reservoir. Although the Trophic State Index, based on water transparency and chlorophyll-a and total phosphorus concentrations, indicated an oligotrophic state for both reservoirs, the higher densities of the zooplankton community in Três Marias Reservoir, as well as the predominance of cyclopoids and smaller-sized species such as bosminids, characterized this environment as mesotrophic. Larger-sized species such as calanoids, daphniids and sidids in Furnas Reservoir characterized the better water quality of this reservoir.
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Papers by Sofía Anaís Brito