974 resultados para Martin, Joshua, 1791-1855.


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Fil: Rosas, Sabrina. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales (UNLP-CONICET); Argentina.

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Se propone ampliar el registro analítico sobre el proceso de conformación del sistema político e institucional de la "Confederación" (1852-1862), atendiendo a las vinculaciones entre el poder central y San Juan. Se examinan las relaciones de negociación y conflicto que entretejieron la política de San Juan entre 1855 y 1858, al calor del desarrollo de una institución estatal nacional: la Circunscripción Militar del Oeste. Se considera en forma recíproca la articulación del poder central en el espacio provincial y los clivajes y sucesos locales y regionales que se generaron en dicho devenir. Se estudia la interacción entre el Jefe de la Circunscripción Nazario Benavides, los Gobernadores de San Juan y los poderes legislativo y ejecutivo nacionales. Además, se enmarca el tema en el proceso de institucionalización política provincial, con especial interés en la sanción de la constitución sanjuanina. Para ello, se conjuga el examen de la Circunscripción con el del Congreso con sede en la ciudad capital de la Confederación (Paraná/Entre Ríos), lo que permite proyectar las escalas analíticas de observación por fuera de la geografía sanjuanina. Se aborda así al Congreso como otro sitio institucional de cristalización de los conflictos y juegos de alianzas políticas provinciales y nacionales estudiadas.

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Como en otras regiones argentinas, la zona rural de Córdoba no estuvo habitada sólo por propieta-rios, esclavos y peones. Hubo otros pobladores menos visibles y que sólo aparecen en los documentos producidos por otros protagonistas. Nuestro objetivo fue visualizar y analizar, en el diverso mundo rural cordobés, las relaciones de poder, dependencia y cooperación que se producen entre los actores. Se utilizaron cuatro indicadores principales: los contratos rurales, las relaciones entre amos y esclavos, los litigios en torno a la propiedad de la tierra y las relaciones de parentesco y proximidad. Se pudo observar una complicada trama de relaciones de tensión, poder, dependencia, cooperación, reconocimiento y protección que caracterizan las formas esenciales del régimen social vigente

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This data set contains aboveground community plant biomass (Sown plant community, Weed plant community, Dead plant material, and Unidentified plant material; all measured in biomass as dry weight) and species-specific biomass from the sown species of the dominance experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the dominance experiment, 206 grassland plots of 3.5 x 3.5 m were established from a pool of 9 plant species that can be dominant in semi-natural grassland communities of the study region. In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 3, 4, 6, and 9 species). Plots were maintained by bi-annual weeding and mowing. Aboveground community biomass was harvested twice in May and August 2006 on all experimental plots of the dominance experiment. This was done by clipping the vegetation at 3 cm above ground in two rectangles of 0.2 x 0.5 m per experimental plot. The location of these rectangles was assigned by random selection of coordinates within the central area of the plots (excluding an outer edge of 50cm). The positions of the rectangles within plots were identical for all plots. The harvested biomass was sorted into categories: individual species for the sown plant species, weed plant species (species not sown at the particular plot), detached dead plant material, and remaining plant material that could not be assigned to any category. All biomass was dried to constant weight (70°C, >= 48 h) and weighed. Sown plant community biomass was calculated as the sum of the biomass of the individual sown species. The mean of both samples per plot and the individual measurements are provided in the data file. Overall, analyses of the community biomass data have identified species richness and the presence of particular species as an important driver of a positive biodiversity-productivity relationship.

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This data set contains aboveground community plant biomass (Sown plant community, Weed plant community, and Dead plant material; all measured in biomass as dry weight) and species-specific biomass from the sown species of the dominance experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the dominance experiment, 206 grassland plots of 3.5 x 3.5 m were established from a pool of 9 plant species that can be dominant in semi-natural grassland communities of the study region. In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 3, 4, 6, and 9 species). Plots were maintained by bi-annual weeding and mowing. Aboveground community biomass was harvested twice in May and August 2003 on all experimental plots of the dominance experiment. This was done by clipping the vegetation at 3 cm above ground in two rectangles of 0.2 x 0.5 m per experimental plot. The location of these rectangles was assigned by random selection of coordinates within the central area of the plots (excluding an outer edge of 50cm). The positions of the rectangles within plots were identical for all plots. The harvested biomass was sorted into categories: individual species for the sown plant species, weed plant species (species not sown at the particular plot), detached dead plant material, and remaining plant material that could not be assigned to any category. All biomass was dried to constant weight (70°C, >= 48 h) and weighed. Sown plant community biomass was calculated as the sum of the biomass of the individual sown species. The mean of both samples per plot and the individual measurements are provided in the data file. Overall, analyses of the community biomass data have identified species richness and the presence of particular species as an important driver of a positive biodiversity-productivity relationship.