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211 resultados encontrados para: TEMA: Paz
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1.
Libro
Estudios sociales de la Paz, B. C. S.: octubre de 1973 / Juan Preciado Llamas
Preciado Llamas, Juan ;
s. l. : s. n. , s. f
Clasificación: 330.97224 / P7
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SAA005007 (Disponible)
Disponibles para prestamo: 1

2.
Libro
Guatemala: proceso de paz y perspectivas
Guatemala : Universidad de San Carlos de Guetemala, Escuela de Historia , s.f.
Clasificación: G/341.73 / G83
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SFA002928 (Disponible)
Disponibles para prestamo: 1

3.
Artículo
*Solicítelo con su bibliotecario/a
Vertical variability of benthic foraminifera and trace elements in a tropical coastal lagoon in the Gulf of California
Sánchez, Alberto (autor) ; Gómez León, Adriana (autora) ; Pérez Tribouillier, Habacuc (autor) ; Rey Villiers, Néstor (autor) ; Ortíz Hernández, Ma. Concepción (autora) ; Rodríguez Figueroa, Griselda Margarita (autora) ; Shumilin, Evgueni (autor) ;
Disponible en línea
Contenido en: Marine Pollution Bulletin Volumen 158, artículo número 111417 (September 2020), p. 1-9 ISSN: 0025-326X
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Resumen en: Inglés |
Resumen en inglés

Population growth around water bodies is deteriorating environmental quality. The benthic foraminiferal and trace element concentration in a pair of short sediment cores were used to establish the quality of the sedimentary environment in a tropical coastal lagoon in the southwestern Gulf of California. From 25 cm depth towards the surface of the sediment core, Ammonia beccarii was dominant over nontolerant species and the concentrations of V, Ni, Co, Zn, Cu, Hg and Pb in the sediments increased compared with the lower depth intervals. This finding suggests a deterioration in the environmental quality of the lagoon since 1980, associated with an increase in the sizes of the population and vehicle fleet in the city of La Paz, Baja California Sur, and with the operation of three fossil fuel-based thermoelectric plants since 1985.


4.
- Artículo con arbitraje
Living with risk: climate change and vulnerability. Community perceptions in peri-urban areas of La Paz City, Mexico
Alfie Cohen, Miriam (autora) ; Cruz Bello, Gustavo M. (autor) ;
Disponible en línea
Contenido en: Sociedad y Ambiente Año 7, número 19 (marzo-junio 2019), páginas 109-136 ISSN: 2007-6576
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Resumen en: Español | Inglés |
Resumen en español

El objetivo de este estudio fue analizar la vulnerabilidad, la capacidad de adaptación y el empoderamiento para enfrentar el cambio climático a través de la percepción de los habitantes en dos comunidades periurbanas expuestas a huracanes e inundaciones en La Paz, Baja California Sur, México. Desarrollamos talleres participativos en cada comunidad para obtener la percepción acerca de su exposición a cambios climáticos y la forma en que los han enfrentado. Ambas comunidades tuvieron la percepción de que ha habido un cambio en las condiciones climáticas a lo largo del año, indicando que ambas son conscientes de la variabilidad climática. La gente reconoció su vulnerabilidad a los cambios en el clima y la alta frecuencia de ciclones en la zona. Además, ellos identificaron las transformaciones económicas y las adaptaciones sociales que estos fenómenos han provocado, y reconocieron los impactos en la salud debidos a la proliferación de nuevas enfermedades. Esto nos permitió confirmar cómo las percepciones de los habitantes son fundamentales, no sólo para detectar la variabilidad climática, sino también para demostrar la importancia del conocimiento local para reducir la vulnerabilidad y mejorar la capacidad de adaptación y empoderamiento. Obtener información local de los impactos del clima para entender las causas sociales de la vulnerabilidad, la adaptación y el empoderamiento es un planeamiento novedoso en el análisis del cambio climático.

Resumen en inglés

This study analyzes two peri-urban communities exposed to hurricanes and floods in La Paz, Baja California Sur, Mexico, showing that both are aware of climate variability. People in these communities recognized their vulnerability to climate change and the high frequency of hurricanes in the area. They also identified the economic transformations, and social adaptations these phenomena have caused, and recognize the impacts on health due to the spread of new diseases. Obtaining local information on climate impacts, understanding the social causes of vulnerability and increasing the effectiveness and efficiency to adaptation through local empowerment are key elements in the analysis of climate change. Our research included meteorological/climate data that complement the information obtained from the inhabitants of the region.


5.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Evidence of intense suboxia and anoxia in a tropical bay of the Gulf of California
Sánchez, Alberto (autor) ; Rodríguez Figueroa, Griselda Margarita (autora) ; Shumilin, Evgueni N. (coaut.) ; Ortíz Hernández, Ma. Concepción (autora) ;
Contenido en: Continental Shelf Research Vol. 168 (September 2018), p. 21-27 ISSN: 0278-4343
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Resumen en: Inglés |
Resumen en inglés

The expansion of the upper boundary of the oxygen minimum zone (OMZ) has been associated with the low solubility of oxygen in the surface ocean due to global warming in tropical regions. However, sedimentary records of δ15N of sinking particulate organic matter and sediments suggest that oxygen solubility is controlled by oceanographic forcing in the tropical equatorial region. To determine the intensification of the OMZ within its upper border, δ15N analysis of the organic matter in superficial sediments of La Paz Bay was carried out. In the present work, 115 samples of superficial sediment were collected in the interval of 2–407 m depth in La Paz Bay. The surface sediments were analysed for the nitrogen isotopic composition of their organic matter. Hypoxia conditions (< 60 μM) at 100 m to depth suggest an intense denitrification of the water column that it was reflected in the sedimentary δ15N. The δ15N of the organic matter is 1.5‰ greater in the bay than in the mouth of the Gulf of California, indicating greater denitrification towards the interior of the bay with respect to the gulf mouth. The intense suboxia/anoxia conditions have been maintained due to a well-mixed water column that promotes exported productivity in La Paz Bay.


6.
- Artículo con arbitraje
Género, institucionalismo y marginalidad: la gestión del agua de uso doméstico como desafío para el empoderamiento de las mujeres. El caso de la ciudad de La Paz, Baja California Sur, México
Castorena Davis, Lorella ; Martínez Valencia, Arely Madai (coaut.) ;
Contenido en: Sociedad y Ambiente Año 7, no. 18 (noviembre 2018-febrero 2019), p. 175-199 ISSN: 2007-6576
PDF PDF
Resumen en: Español | Inglés |
Resumen en español

El objetivo de este artículo es analizar la persistencia de la división tradicional del trabajo doméstico. La escasa valoración de las actividades de reproducción de la vida, como la maternidad, y el cuidado y atención a otras personas, sumada a condiciones de marginalidad, derivan en un incremento de las cargas de trabajo y reducen las probabilidades de empoderamiento de las mujeres. Asimismo la mala distribución de recursos como el agua, junto con su escasez y deficiente calidad, se tornan en obstáculos para alcanzar la igualdad de género. El vínculo teórico entre género, institucionalismo y marginalidad, así como la selección del caso de estudio, representan los aportes más relevantes de este trabajo, en tanto permiten mostrar el impacto que el funcionamiento de la institución encargada de la distribución del agua tiene sobre las mujeres, en la medida que refuerza el hábito y la norma cultural que las responsabiliza de resolver el abasto de agua al interior de sus hogares. Se analiza la problemática de género que enfrentan mujeres jefas de familia respecto al agua de uso doméstico en cinco colonias marginadas de la ciudad de La Paz, en las que se aplicó un total de 42 cuestionarios gracias a los cuales se concluyó que las mujeres jefas de hogares marginados además de la sobrecarga de trabajo doméstico y de cuidados derivados del abasto insuficiente y deficiente de agua que provee el organismo operador, deben enfrentar los costos derivados tanto del conjunto de diligencias cotidianas que realizan para garantizar que el agua que reciben alcance para satisfacer sus necesidades mínimas, como del gasto que representa el consumo de agua embotellada proveniente de las plantas purificadoras locales o de barrio.

Resumen en inglés

The objective of this article is to analyze the persistence of the traditional division of domestic work within households, with little appreciation of the activities of reproduction of life, motherhood, care and attention to other people, which in marginal conditions increase burdens and reduce the likelihood of women’s empowerment, where scarcity, poor distribution and quality of water become an obstacle to gender equality, enjoyment of the human right to water and women’s rights. The theoretical link between gender, institutionalism and marginality, as well as the selection of the case study, constitutes our most relevant contribution, because it allows analyzing the impact that the functioning of the institution responsible for the distribution of water has about women, because it reinforces the habit and the cultural norm that is responsible for solving the supply of water inside their homes. We analyzed the gender problems faced by women heads of households about domestic water in five marginalized colonies in the city of La Paz, in which we applied a total of 42 questionnaires, with which we concluded that women heads of marginalized households in addition to the overload of domestic work and care derived from insufficient and deficient supply of water provided by the public organism, they must face the costs derived from both the daily errands they need to make so that the water they receive to meet their minimum needs, as the cost paid for the consumption of bottled water to local or neighborhood purifiers.


7.
Libro
Proyecto de nación 2018-2024[Libro electrónico] / Andrés Manuel López Obrador [coordinador]
López Obrador, Andrés Manuel (coord.) ;
Distrito Federal, México : Movimiento de Regeneración Nacional , 2018
PDF

8.
Capítulo de libro
Sylvilagus mansuetus: Nelson, 1907
Lorenzo Monterrubio, Consuelo (autora) ; Rioja Paradela, Tamara Mila (autora) ; Carrillo Reyes, Arturo (autor) ; De la Paz Cuevas, Mayra (autora) ; Álvarez Castañeda, Sergio Ticul (autor) (1970-) ;
Disponible en línea
Contenido en: Lagomorphs pikas, rabbits, and hares of the world / edited by Andrew T. Smith, Charlotte H. Johnston, Paulo C. Alves, Klaus Hackländer Baltimore, Maryland, United States : Johns Hopkins University Press, 2018 páginas 145-147 ISBN:978-1421423401
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9.
Artículo
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Evaluation of enzyme activities in long-term polluted soils with mine tailing deposits of San Luis Potosí, México
Martínez Toledo, Ángeles (coaut.) ; Montes Rocha, Ángel (coaut.) ; González Mille, Donaji Josefina (coaut.) ; Espinosa Reyes, Guillermo ; Torres Dosal, Arturo ; Mejia Saavedra, Jesús J. (coaut.) ; Ilizaliturri Hernández, César Arturo (coaut.) ;
Contenido en: Journal of Soils and Sediments Vol. 17, no. 2 (February 2017), p. 364-375 ISSN: 1439-0108
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Resumen en: Inglés |
Resumen en inglés

Purpose San Luis Potosí is one of the largest metal producers; mining activity has been responsible for metal emissions for over 100 years, from several sources (deposits, tailings, effluents, and dusts) generating effects in human and ecosystem health. The objective of this study was to evaluate the effect of the concentrations of heavy metals in the soil health of four municipalities of San Luis Potosí contaminated with mine tailings, using enzyme activity as a biochemical endpoint. Materials and methods Four municipalities contaminated with residues of historical mining activity were analyzed (25 topsoil samples per type of site contaminated and reference). The parameters that were analyzed included pH; organic matter (OM); electrical conductivity (EC); percentage of clay, As, Cd, Cr, Cu, Hg, Pb, and Zn; and arylsulfatase (ARS), β-glucosidase (BG), urease (UR), and fluorescein diacetate hydrolysis (FDA) activities in soil. Differences among the parameters per municipality and type of site were evaluated using a factorial analysis of variance. The relationships were analyzed by Pearson’s correlation and a stepwise distance-based linear model permutation test (DistLM). Results were visualized using a distance-based redundancy analysis (dbRDA). A hazard quotient (HQ) for metals was calculated in order to estimate the effects on soil microbial processes.

Results and discussion A concentration gradient (mg/kg) of Zn (4744.5–65,585.7), Pb (1321.0–31,932.2), As (ND-8736.7), and Cu (130.9–8475.4) was found in the contaminated sites. The HQ showed a very high hazard level for the elements detected in all contaminated sites (1.4–655.8). The pattern of enzymatic inhibition found was ARS (95.8 %), UR (90.6 %), FDA (86.9 %), and BG (76.0 %). Strong negative relationships were observed among enzymatic activities and heavy metals in the following inhibitory effect Cu > As > Zn > Pb. Metals and covariables explained from 84 to 86 % of variability in enzyme activity. EC, Cu, and As showed a strong inhibitory effect; and parameters such as OM, pH, and clay were found to have a slightly inducing effect. Conclusions In this study, the heavy metal concentrations were higher than the ones obtained in other reports for this region. The HQ reveals the presence of possible risks for the health of life in the region. The decrease of enzyme activities in soil could trigger adverse changes in the flow of matter and energy in ecosystems. This study provides a field baseline that could be part of a long-term monitoring program for these locations.


10.
- Artículo con arbitraje
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Variation in isotopic trophic structure and fish diversity in mangrove systems subject to different levels of habitat modification in the Gulf of California, Mexico
López Rasgado, Francisco Javier ; Lluch Cota, Salvador E. (coaut.) ; Balart, Eduardo F. (coaut.) ; Herzka, Sharon Z. (coaut.) ;
Contenido en: Bulletin of Marine Science Vol. 92, no. 4 (October 2016), p. 399-422 ISSN: 0007-4977
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Resumen en: Inglés |
Resumen en inglés

Anthropogenic modification of mangrove systems can lead to decreased habitat quality, potentially affecting food web structure and ecosystem function. Based on carbon and nitrogen stable isotopes, we evaluated the trophic structure of the fish communities from three mangrove systems in southern Baja California, Mexico, subject to varying levels of habitat modification. We hypothesized that anthropogenic habitat modification leads to differences in niche space (and hence trophic structure). We applied a Bayesian approach to the calculation of community level isotope-based metrics of functional trophic structure and compared the results to a structural (Shannon-Wiener) index of diversity. Frequency distributions of stable isotope ratios revealed differences between the highly modified mangrove system and those with limited or no habitat modification. Comparison of the isotopic composition of the dominant fish species sampled in summer and winter indicated limited seasonal differences in this arid region. However, isotope-derived metrics of niche space were evaluated in the most highly modified mangrove system, suggesting a greater complexity in nutrient and primary production sources, a higher level of dietary specialization, and low functional redundancy. Fishes from the most pristine mangrove system exhibited highest diversity, a more limited range of isotopic values, and smaller measures of isotopic niche space, indicative of higher trophic redundancy. Comparison of the standardized (baseline-controlled) species-specific isotope ratios indicated that in 37% of cases isotopic differences persisted, further supporting our interpretation of variations in trophic structure. This research highlights that mangrove habitat modification has a marked influence on functional trophic diversity, as well as the fish community structure.