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Vegetación ribereña: indicador de la salud del río de la Reserva de la Biósfera de la Barranca de Metztitlán

MAYRA MENDOZA CARIÑO (2015)

Tesis (Doctorado en Ciencias, especialista en Hidrociencias).- Colegio de Postgraduados, 2014.

La presente tesis se divide en tres secciones: i) contaminantes en los efluentes de las actividades productivas y sus efectos en la biota acuática, que incluye 32 actividades humanas que descargan sus aguas residuales a los ríos, y el impacto que tienen los agentes contaminantes en la calidad del agua, la flora y fauna acuáticas; ii) estado ecológico de ríos y vegetación ribereña, dentro del contexto de la nueva ley general de aguas de México, que presenta una propuesta para considerar el estado ecológico de los ríos y los lineamientos que se deben establecer en la nueva ley, al incluir a la vegetación ribereña en el cuidado de la integridad ecológica de los ríos; iii) estado ecológico del río Metztitlán, Estado de Hidalgo, que presenta la evaluación de la salud del río con base en el Riparian Quality Index (RQI) y el indicador biológico, vegetación ribereña. _______________ ABSTRACT: This thesis is divided in three sections: i) pollutants in wastewater of productive activities and their effects in the aquatic biota, that include 32 human activities that discharge wastewater into rivers, an the impact of pollutants on water quality, aquatic flora and fauna; ii) ecological status of rivers and riparian vegetation, within the new general mexican water's law context, presenting a proposal to consider the ecological status of rivers and guidelines that must be set in the new law, to include riparian vegetation in the care of the ecological integrity of rivers; iii) ecological status of Metztitlán river, State of Hidalgo, which presents the evaluation of river health based on the Riparian Quality Index (RQI) and the biological indicator, riparian vegetation.

Doctoral thesis

Estado ecológico Nueva ley general de aguas Integridad ecológica Ríos Índice de calidad riparia Bioacumulación Biomagnificación Metales pesados Corredor biológico Ecollogical status New general mexican water's law Ecollogical integrity Riparian quality index Bioaccumulation Biomagnification Heavy metals Biological corridor Hidrociencias Doctorado CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA

Arsenic toxicity, bioaccumulation and risk assessment: A case study in Tolimique Dam, Aguascalientes, Mexico

Jesús Alvarado Flores ISIDORO RUBIO FRANCHINI ALEJANDRA SOFIA SANCHEZ AVILA Gabriel de Jesús Ramírez Tlalolín Roberto Rico_Martinez (2019)

We detected arsenic near the Tolimique Dam, an archaeological ecotourism area in Aguascalientes, México. Fortunately, the concentration range of this metalloid (0.001 to 0.003 mg L−1) did not exceed the total arsenic in water allowed by NOM 127 SSA1 1994 (0.025 mg L−1). However, because arsenic is a high risk priority pollutant at low concentrations in aquatic ecosystems, we studied the acute toxicity, bioaccumulation, and endocrine disruption of arsenic using native species of Rotifera (Brachionus calyciflorus Pallas, 1766, Brachionus rubens Ehrenberg, 1838, and Lecane cornuta Müller, 1786), Oligochaeta (Aeolosoma hemprichi Ehrenberg, 1838), and fish (Oreochromis nilotica Linnaeus, 1758). We found 20 species in the Tolimique Dam, including 13 rotifer species, 4 cladocerans species, and one of each of the following species: copepods, oligochaetes, and fish. Environmental Risk Assessment (ERA) was performed using the Predicted No Effect Concentration (PNEC) and the Measured Environmental Concentration (MEC) of arsenic. In conclusion, arsenic produced celular necrosis in A. hemprichi at a concentration of 5.0 mg L−1 and endocrine disruption in B. calyciflorus at a concentration of 0.05 mg L−1. The detection of arsenic at an average of 2.05 ± 0.30 mg Kg−1 in O. niloticus fish suggests a probable biomagnification of arsenic.

Article

METALLOID BIOMAGNIFICATION METALLOIDS POLLUTION ECOTOXICOLOGY CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS DE LA TIERRA Y DEL ESPACIO HIDROLOGÍA CALIDAD DE LAS AGUAS CALIDAD DE LAS AGUAS