La laguna El Limon, en el municipio de Reforma, Chiapas, Mexico, ha presentado mortandad masiva d... more La laguna El Limon, en el municipio de Reforma, Chiapas, Mexico, ha presentado mortandad masiva de peces, lo que llevo a realizar un estudio mas profundo que determinara el grado de contaminacion de la laguna, asi como las causas posibles de los eventos. Los resultados muestran que en los sedimentos de la laguna las concentraciones promedio de Zn, Ni, Cr, Cd y Cu rebasan los limites recomendados en Canada y Estados Unidos para evitar la aparicion de efectos biologicos nocivos en especies acuaticas. Es de especial mencion la acumulacion de Zn, que presenta una concentracion maxima de 1360 mg/kg, presumiblemente asociada al uso de este metal como catalizador en una planta procesadora de gas. Si bien las descargas industriales que vierten a la laguna cumplen con los estandares establecidos en Mexico para metales, esto no ha sido suficiente para evitar su acumulacion en los sedimentos, lo cual demuestra que las normas existentes para las descargas de aguas residual industrial deben aume...
Resumen: La visio n economicista adoptada en Me xico supone una excesiva importacio n de alimento... more Resumen: La visio n economicista adoptada en Me xico supone una excesiva importacio n de alimentos, abandono del campo, desnutricio n y dependencia del exterior para generar los alimentos que consume. El Estado ha renunciado al bien comu n, falto de visio n de soberani a propia y seguridad alimentaria. En este contexto, las universidades pueden ser catalizadores del cambio con un enfoque siste mico, al tomar un papel ma s activo que impulse el cambio hacia una visio n sustentable, de proteccio n de la diversidad biolo gica y cultural, que considere sistemas de produccio n y consumo de alimentos que ya esta n arraigados en el pai s. En este trabajo presentamos una propuesta de ana lisis, estructuracio n y desarrollo de un esquema formativo en la universidad pu blica que permita dar el paso hacia una pra ctica integral de consumo y convivencia. Abstract: Th e economicist vision adopted in Mexico assumes excessive importation of food, an abandoned countryside, malnutrition, and depende...
This article relates epilithic dry- and wet-seasonal bacterial biofilm composition to water quali... more This article relates epilithic dry- and wet-seasonal bacterial biofilm composition to water quality along Río de la Sabana near Acapulco, Mexico. Samples were taken from various locations including nearly pristine upland locations, adjacent to residential floodplain developments, and immediately upstream from an estuarine lagoon. Bacterial composition was identified through sequential DNA analysis at the phylum, class, order, and family levels, with most of these categorized as heterotrophs, autotrophs, denitrifiers, nitrogen fixers, pathogens, and/or potential bioremediators based on generalized literature-sourced assignments. The results were interpreted in terms of location by extent of effluent pollution, and by dry versus wet seasonal changes pertaining to biofilm composition, related bacterial functions, and the following water quality parameters: temperature, pH, dissolved oxygen, biological and chemical oxygen demand, fecal and total bacteria counts, methylene blue active su...
“El Limón” Lagoon belongs to the Reforma municipality, in the State of Chiapas, Mexico. Massive ... more “El Limón” Lagoon belongs to the Reforma municipality, in the State of Chiapas, Mexico. Massive fish killings have occurred in the lagoon, demanding a deeper study to determine the pollution state of the lagoon, as well as the possible cause of the deaths. Results show that the average concentrations of Zn, Ni, Cr, Cd and Cu in the lagoon are beyond the recommended limits in Canada and USA to avoid deleterious biological effects in aquatic species. Special mention has to be done for the case of Zn, with a maximum concentration of 1360 mg/kg, presumably associated with the use of this metal as a catalyst in a natural gas plant close to the lagoon. Although the industrial discharges comply with the Mexican Standards for metals in wastewaters, this has not been enough to avoid the accumulation of metals in sediments, which is a demonstration of failure of the Mexican Wastewater Standards that should be more restrictive especially in the case of lagoons with a low water recharge, taking into account the type of water body where the wastewater is loading. In the case of the application of this water for agriculture, the metals can accumulate in soils, with unwanted effects on crops.
Resumen:
La visión economicista adoptada en México supone una excesiva importación de alimentos, ... more Resumen: La visión economicista adoptada en México supone una excesiva importación de alimentos, abandono del campo, desnutrición y dependencia del exterior para generar los alimentos que consume. El Estado ha renunciado al bien común, falto de visión de soberanía propia y seguridad alimentaria. En este contexto, las universidades pueden ser catalizadores del cambio con un enfoque sistémico, al tomar un papel más activo que impulse el cambio hacia una visión sustentable, de protección de la diversidad biológica y cultural, que considere sistemas de producción y consumo de alimentos que ya están arraigados en el país. En este trabajo presentamos una propuesta de análisis, estructuración y desarrollo de un esquema formativo en la universidad pública que permita dar el paso hacia una práctica integral de consumo y convivencia. Abstract: The economicist vision adopted in Mexico assumes excessive importation of food, an abandoned countryside, malnutrition, and dependence on other countries to generate the food the nation consumes. The state has renounced the common good, lacking a vision of its own sovereignty and food security. In this context, universities can be catalysts of change with a systemic focus, by taking a more active role in encouraging a sustainable vision that protects biological and cultural diversity, and considers the production systems and food consumption patterns that are already established in Mexico. In this article we propose the analysis, structure, and development of a tra- ining system in public universities that enables making progress toward integrated practices of consumption and interaction.
La laguna El Limon, en el municipio de Reforma, Chiapas, Mexico, ha presentado mortandad masiva d... more La laguna El Limon, en el municipio de Reforma, Chiapas, Mexico, ha presentado mortandad masiva de peces, lo que llevo a realizar un estudio mas profundo que determinara el grado de contaminacion de la laguna, asi como las causas posibles de los eventos. Los resultados muestran que en los sedimentos de la laguna las concentraciones promedio de Zn, Ni, Cr, Cd y Cu rebasan los limites recomendados en Canada y Estados Unidos para evitar la aparicion de efectos biologicos nocivos en especies acuaticas. Es de especial mencion la acumulacion de Zn, que presenta una concentracion maxima de 1360 mg/kg, presumiblemente asociada al uso de este metal como catalizador en una planta procesadora de gas. Si bien las descargas industriales que vierten a la laguna cumplen con los estandares establecidos en Mexico para metales, esto no ha sido suficiente para evitar su acumulacion en los sedimentos, lo cual demuestra que las normas existentes para las descargas de aguas residual industrial deben aume...
Resumen: La visio n economicista adoptada en Me xico supone una excesiva importacio n de alimento... more Resumen: La visio n economicista adoptada en Me xico supone una excesiva importacio n de alimentos, abandono del campo, desnutricio n y dependencia del exterior para generar los alimentos que consume. El Estado ha renunciado al bien comu n, falto de visio n de soberani a propia y seguridad alimentaria. En este contexto, las universidades pueden ser catalizadores del cambio con un enfoque siste mico, al tomar un papel ma s activo que impulse el cambio hacia una visio n sustentable, de proteccio n de la diversidad biolo gica y cultural, que considere sistemas de produccio n y consumo de alimentos que ya esta n arraigados en el pai s. En este trabajo presentamos una propuesta de ana lisis, estructuracio n y desarrollo de un esquema formativo en la universidad pu blica que permita dar el paso hacia una pra ctica integral de consumo y convivencia. Abstract: Th e economicist vision adopted in Mexico assumes excessive importation of food, an abandoned countryside, malnutrition, and depende...
This article relates epilithic dry- and wet-seasonal bacterial biofilm composition to water quali... more This article relates epilithic dry- and wet-seasonal bacterial biofilm composition to water quality along Río de la Sabana near Acapulco, Mexico. Samples were taken from various locations including nearly pristine upland locations, adjacent to residential floodplain developments, and immediately upstream from an estuarine lagoon. Bacterial composition was identified through sequential DNA analysis at the phylum, class, order, and family levels, with most of these categorized as heterotrophs, autotrophs, denitrifiers, nitrogen fixers, pathogens, and/or potential bioremediators based on generalized literature-sourced assignments. The results were interpreted in terms of location by extent of effluent pollution, and by dry versus wet seasonal changes pertaining to biofilm composition, related bacterial functions, and the following water quality parameters: temperature, pH, dissolved oxygen, biological and chemical oxygen demand, fecal and total bacteria counts, methylene blue active su...
“El Limón” Lagoon belongs to the Reforma municipality, in the State of Chiapas, Mexico. Massive ... more “El Limón” Lagoon belongs to the Reforma municipality, in the State of Chiapas, Mexico. Massive fish killings have occurred in the lagoon, demanding a deeper study to determine the pollution state of the lagoon, as well as the possible cause of the deaths. Results show that the average concentrations of Zn, Ni, Cr, Cd and Cu in the lagoon are beyond the recommended limits in Canada and USA to avoid deleterious biological effects in aquatic species. Special mention has to be done for the case of Zn, with a maximum concentration of 1360 mg/kg, presumably associated with the use of this metal as a catalyst in a natural gas plant close to the lagoon. Although the industrial discharges comply with the Mexican Standards for metals in wastewaters, this has not been enough to avoid the accumulation of metals in sediments, which is a demonstration of failure of the Mexican Wastewater Standards that should be more restrictive especially in the case of lagoons with a low water recharge, taking into account the type of water body where the wastewater is loading. In the case of the application of this water for agriculture, the metals can accumulate in soils, with unwanted effects on crops.
Resumen:
La visión economicista adoptada en México supone una excesiva importación de alimentos, ... more Resumen: La visión economicista adoptada en México supone una excesiva importación de alimentos, abandono del campo, desnutrición y dependencia del exterior para generar los alimentos que consume. El Estado ha renunciado al bien común, falto de visión de soberanía propia y seguridad alimentaria. En este contexto, las universidades pueden ser catalizadores del cambio con un enfoque sistémico, al tomar un papel más activo que impulse el cambio hacia una visión sustentable, de protección de la diversidad biológica y cultural, que considere sistemas de producción y consumo de alimentos que ya están arraigados en el país. En este trabajo presentamos una propuesta de análisis, estructuración y desarrollo de un esquema formativo en la universidad pública que permita dar el paso hacia una práctica integral de consumo y convivencia. Abstract: The economicist vision adopted in Mexico assumes excessive importation of food, an abandoned countryside, malnutrition, and dependence on other countries to generate the food the nation consumes. The state has renounced the common good, lacking a vision of its own sovereignty and food security. In this context, universities can be catalysts of change with a systemic focus, by taking a more active role in encouraging a sustainable vision that protects biological and cultural diversity, and considers the production systems and food consumption patterns that are already established in Mexico. In this article we propose the analysis, structure, and development of a tra- ining system in public universities that enables making progress toward integrated practices of consumption and interaction.
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lagoon, as well as the possible cause of the deaths. Results show that the average concentrations of Zn, Ni, Cr, Cd and Cu in the lagoon are beyond the recommended limits in Canada and USA to avoid deleterious biological effects in aquatic species. Special mention has to be done for the case of Zn, with a maximum concentration of 1360 mg/kg, presumably associated with the use of this metal as a catalyst in a
natural gas plant close to the lagoon. Although the industrial discharges comply with the Mexican Standards for metals in wastewaters, this has not been enough to avoid the accumulation of metals in sediments, which is a demonstration of failure of the Mexican Wastewater Standards that should be more restrictive especially in the case of lagoons with a low water recharge, taking into account the type of water
body where the wastewater is loading. In the case of the application of this water for agriculture, the metals can accumulate in soils, with unwanted effects on crops.
La visión economicista adoptada en México supone una excesiva importación de alimentos, abandono del campo, desnutrición y dependencia del exterior para generar los alimentos que consume. El Estado ha renunciado al bien común, falto de visión de soberanía propia y seguridad alimentaria. En este contexto, las universidades pueden ser catalizadores del cambio con un enfoque sistémico, al tomar un papel más activo que impulse el cambio hacia una visión sustentable, de protección de la diversidad biológica y cultural, que considere sistemas de producción y consumo de alimentos que ya están arraigados en el país. En este trabajo presentamos una propuesta de análisis, estructuración y desarrollo de un esquema formativo en la universidad pública que permita dar el paso hacia una práctica integral de consumo y convivencia.
Abstract:
The economicist vision adopted in Mexico assumes excessive importation of food, an abandoned countryside, malnutrition, and dependence on other countries to generate the food the nation consumes. The state has renounced the common good, lacking a vision of its own sovereignty and food security. In this context, universities can be catalysts of change with a systemic focus, by taking a more active role in encouraging a sustainable vision that protects biological and cultural diversity, and considers the production systems and food consumption patterns that are already established in Mexico. In this article we propose the analysis, structure, and development of a tra- ining system in public universities that enables making progress toward integrated practices of consumption and interaction.
lagoon, as well as the possible cause of the deaths. Results show that the average concentrations of Zn, Ni, Cr, Cd and Cu in the lagoon are beyond the recommended limits in Canada and USA to avoid deleterious biological effects in aquatic species. Special mention has to be done for the case of Zn, with a maximum concentration of 1360 mg/kg, presumably associated with the use of this metal as a catalyst in a
natural gas plant close to the lagoon. Although the industrial discharges comply with the Mexican Standards for metals in wastewaters, this has not been enough to avoid the accumulation of metals in sediments, which is a demonstration of failure of the Mexican Wastewater Standards that should be more restrictive especially in the case of lagoons with a low water recharge, taking into account the type of water
body where the wastewater is loading. In the case of the application of this water for agriculture, the metals can accumulate in soils, with unwanted effects on crops.
La visión economicista adoptada en México supone una excesiva importación de alimentos, abandono del campo, desnutrición y dependencia del exterior para generar los alimentos que consume. El Estado ha renunciado al bien común, falto de visión de soberanía propia y seguridad alimentaria. En este contexto, las universidades pueden ser catalizadores del cambio con un enfoque sistémico, al tomar un papel más activo que impulse el cambio hacia una visión sustentable, de protección de la diversidad biológica y cultural, que considere sistemas de producción y consumo de alimentos que ya están arraigados en el país. En este trabajo presentamos una propuesta de análisis, estructuración y desarrollo de un esquema formativo en la universidad pública que permita dar el paso hacia una práctica integral de consumo y convivencia.
Abstract:
The economicist vision adopted in Mexico assumes excessive importation of food, an abandoned countryside, malnutrition, and dependence on other countries to generate the food the nation consumes. The state has renounced the common good, lacking a vision of its own sovereignty and food security. In this context, universities can be catalysts of change with a systemic focus, by taking a more active role in encouraging a sustainable vision that protects biological and cultural diversity, and considers the production systems and food consumption patterns that are already established in Mexico. In this article we propose the analysis, structure, and development of a tra- ining system in public universities that enables making progress toward integrated practices of consumption and interaction.