A new species of Hyalella (Crustacea, Amphipoda, Dogielinotidae) from the Atlantic Forest of Misiones, Argentina

The freshwater genus Hyalella Smith, 1874 has a distribution restricted to the Western Hemisphere with most species being found in South America. In this report we describe a new species of Hyalella from the Atlantic Forest of the Misiones province, Argentina.Fil: Colla, Maria Florencia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División de Zoología Invertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: César, Inés Irma. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División de Zoología Invertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Argentinas Crises and the Poor, 1995-2002

This paper documents the impact of Argentina's recent economic crises on different aspects of poverty, with a special focus on the economic collapse of 2002. We discuss the methodology of poverty measurement in Argentina and we use a simple rule to compensate for the lack of regional poverty figures until 2001, providing consistent series of urban poverty estimates at the national and regional levels. We then present series of short term dynamics of poverty, decomposing the changes in every period of time with panel data. Finally, we analyse the determinants of poverty, with a focus on accounting for observed differences in income (and thereby poverty) between October 2001 and May 2002. Among other conclusions, we find in our decomposition analysis that households without the means to diversify their income sources suffered more than others from the crisis of 2002.Poverty, unemployment, Argentina.

Rural poor in rich rural areas : poverty in rural Argentina

Rural poverty remains a crucial part of the poverty picture in Argentina. This paper used a rural dataset collected by the World Bank in 2003. Findings show that extreme income poverty in rural areas reached 39 percent of the people or 200,000-250,000 indigent families. These families tend to: be large, and young, and to escape from poverty as they mature and children leave the household (life cycle); live largely in dispersed areas where basic service provision is often weak and delivery is difficult (in particular school attendance beyond 11 years of age falls off very rapidly compared with grouped rural or urban areas); and be more likely to be small landholders than landless laborers. The structure of poverty in rural Argentina shows that larger households are poorer than smaller households, female-headed households are poorer than male-headed households, young households/household heads are poorer than older households/household heads, the poor tend to work more in the informal sector, and a greater share of those engaged in agriculture are poor. However, poverty is by no means strictly an agricultural problem. Furthermore, the deepest poverty is among the poorly educated and young household heads with children. Without interventions to improve their opportunities and assets, their plight is likely to worsen.Rural Poverty Reduction,Population Policies,Achieving Shared Growth,Services&Transfers to Poor

Factors influencing income inequality across urban Argentina (1998-2003)

This paper tries to disentangle the most relevant determinants of spatial inequality in the urban areas of Argentina. The analysis is restricted to the period 1998-2003. The study is performed with a Panel Data approach using a random effects model. Results suggest that human capital, measured by rates of education completion, is an important contributor to spatial inequality. High rates of primary education appear to reduce inequality while higher rates of secondary education appear to increase it. Labor market characteristics also play a role: urban areas with higher unemployment rates, higher returns to education and a lower percentage of people employed in the secondary sector tend to have higher levels of inequality. Also, dependency and the percentage of people with unsatisfied basic needs have increasing-inequality effects. Finally, there seems to be a relationship between inequality and the level of development, though not with a clear inverted-U pattern as hypothesized by Kuznets. Results are robust to different measures of inequality and different income specifications.

Educational Inequality in Argentina: The best and worst performers.

What do we know about inequality in educational attainment across Argentina's cities? To answer this question, we present the education Gini coefficient for the period 2002-2007. Using microdata from the national household survey, we document the following results. First, educational inequality has declined in almost all metropolitan areas whereas i t has increased in Posadas, Mar del Plata, Rosario and Formosa. Second, although there are no important differences in the average years of schooling across cities, great disparities exist with respect to the education Gini. Buenos Aires City is in a leading position, especially in relation to the northeast region of the country and, particularly, Posadas city.Gini, Inequality, Bootstrap

The impact of economic policies over the agricultural sector in the southern hemisphere: The case of Argentina, 1980 - 2006

The aim of this paper is to analyze the impact of the economic policies on the Argentinean Agricultural sector for the period 1980-2007. By evaluating the changes that have been taken place in the production styles and the role played by the rise in profitability of cereals, oleaginous crops and beef cattle, we seek to identify the main elements that will allow us to understand the general path that the sector has taken for the period under analysis. After explaining the general evolution of the sector, we end up our analysis identifying the future challenges that the country will face regarding food security, health regulations and environmental problems.agriculture, livestock, profitability, food security, Argentina.,

Balance histórico de nitrógeno, fósforo y azufre de la región pampeana

Se realizó un balance de superfice de nitrógeno (N), fósforo (P) y azufre (S) para la Región Pampena desde 1870 a 2010, período en que se produjo la expansión agrícola en la región. Para N se computaron como entradas el aporte atmósferico, la fijación simbiótica y la fertilización. Las salidas fueron la exportación en grano y productos animales. Para P y S el balance incluyó como entradas el aporte atmosférico y la fertilización y como salidas las mismas que para N. El balance se calculó en forma anual y acumulada y también se calculó la relación salida/entrada anual. Las bases de datos fueron censos nacionales y estadísticas oficiales para estimar las salidas y se hicieron estimaciones de aporte atmosférico, fijación simbiótica y consumo de fertilizantes. La entrada de N fue de 202 Mt, siendo el aporte atmósférico (36%) y la fijación simbiótica (58%) los componentes principales. La salida fue de 76 Mt, con la exportación en grano como principal factor (83%); resultando en un balance positivo de 126 Mt. Este flujo equivale a un cuarto del stock de N de los suelos hasta 1 m. Otros estudios mostraron que no se produjeron cambios en los stock de N pampeano entre 1960-80 y 2007-2008, período durante el cual el balance de N fue de +52 Mt. En consecuencia, se estimaron pérdidas gaseosas o por lixiviación durante este lapso de 26 kg ha-1 año-1. Para fósforo la entrada fue 4,2 Mt, con mayor peso del componente fertilizantes (67%) y la salida de 12,2 Mt, generado sobre todo por la cosecha de granos (76%), determinando un balance negativo de -8,0 Mt. La entrada de azufre fue de 3,9 Mt, principalmente generada por la atmósfera (81%) y la salida de 5,6 Mt, debido sobre todo a la exportación en grano (82%), con un balance negativo de -1,7 Mt. Estos resultados indican pérdida de P y S desde las reservas de los suelos. La relación salida/entrada de N pasó de 0,2 a 0,7 en el lapso estudiado, mientras que para P y S ha sido mayor a 1 desde hace décadas.A surface balance for nitrogen (N), phosphorus (P), and sulfur (S) was performed for the Argentine Pampas during the 1870- 2010 time interval, comprising the agricultural expansion period in the region. Nitrogen inputs accounted in the balance were atmospheric deposition, symbiotic fixation, and fertilization. Outputs included were grain harvest and livestock products. P and S balances included atmospheric deposition and fertilization as inputs and the same outputs than in the case of N balance. Annual and cumulative balances were calculated and also an annual output/input ratio. National information and official statistics were used to determine the nutrient outputs whereas atmospheric deposition, symbiotic fixation, and fertilizer inputs were estimated. Cumulative N input was of 202 Mt, atmospheric deposition (36%) and symbiotic fixation (58%) represented the main components. The output was of 76 Mt, with grain harvest as main factor (83%), thus resulting in a positive N balance of 126 Mt. This nutrient flow is equivalent to one quart of the soil N stock to 1 m depth. As previous studies showed that soil N stock did not changed between 1960-1980 and 2007-2008, period during which a positive N balance of 52 Mt was calculated, this resulted in a loss of 26 kg ha-1 yr-1 due to gas emissions and leaching in recent decades. Phosphorus input was 4.2 Mt, mainly explained by fertilization (67%), and the output was 12.2 Mt, generated mainly by grain harvest (76%), which determined a negative balance of -8.0 Mt. Sulfur input was 3.9 Mt, mainly determined by atmospheric deposition (81%) and the output was 5.6 Mt, mainly due to grain harvest (82%) resulting also in a negative balance of -1.7 Mt. These results indicate P and S losses from soil stocks. The N output/input ratio varied from 0.2 to 0.7 along the study period, while the P and S ratios have been higher than 1 since decades.Fil: Alvarez, Roberto. Universidad de Buenos Aires. Facultad de Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; ArgentinaFil: Steinbach, Haydee S.. Universidad de Buenos Aires. Facultad de Agronomía; ArgentinaFil: de Paepe, Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; Argentina. Universidad de Buenos Aires. Facultad de Agronomía; Argentin

Bipolar flaking as a component of a supraregional lithic resource base: A comparative study of cores from the Pampean and Northcentral Patagonian Atlantic coasts (Argentina)

Several authors argue that bipolar technology is an expeditious and versatile strategy, efficient for the reduction of small nodules. However, few studies analyze the use of bipolar reduction in relation to the lithic environmental supply. At the Pampean and Patagonian maritime coast, the technique has been widely recorded and seems to be conspicuous in indigenous populations that occupied coastal areas. With the aim of assessing and comparing the application of bipolar reduction, 196 nuclei recovered from sites of diverse chronologies in the Pampean and northcentral Patagonic coasts were analyzed. The use of the bipolar technique was observed in relation to the lithic environmental structure, the size of nodules and their raw material. The results revealed high frequencies of bipolar nuclei at the Pampean coast (87%) and moderate frequencies at the northcentral Patagonic coast (39%). It was determined that the variables that influenced the application of bipolar techniques the most were the small size of the nodules and their rounded shape, generally thick, and without flat surfaces. As for raw material quality, the technique was applied on good to medium quality rocks at the Pampean coast, while in the northcentral coast it was exclusively applied on pebbles and cobbles of superior qualities (very good to excellent). The differences observed are most likely linked with technological choices made by different coastal populations to make the best use of widely available local rocks.Fil: Banegas, Anahi. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Bonomo, Mariano. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Gomez Otero, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Reptilia, Squamata, Colubridae, Liophis sagittifer sagittifer : distribution extension

Se cita una nueva localidad para Liophis saggitifer. La distribucion geografica de esta especie en Patagonia es aun poco conocida, con este registro su distribucion se extiende considerablemente representando el registro mas austral de la especie.Fil: Avila, Luciano Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentin