Elementos conceptuales y metodológicos para la evaluación de impactos ambientales acumulativos (eiaac) en bosques subtropicales : el caso del este de salta, argentina

163-178Northern Argentina experienced an unprecedented deforestation rate of xerophitic forests as a consequence of agricultural expansion. In the Province of Salta, 26 percent of the forest were removed between 1977 and 2008. At the end of 2007, just before the No. 26331 Law of Native Forest Protection was voted by the Congress, the highest annual rate of deforestation was registered, reaching a value of 2.1 percent. Regarding this situation, indigenous people of Eastern Salta along with the "criollos" (local small ranchers) appealed to the National Supreme Court of Justice for legal protection. The Court requested the province to elaborate a Cumulative Environmental Effects Assessment (CEEA) regarding the process of logging and deforestation in four departments of Salta Province (San Martín, Rivadavia, Santa Victoria, and Orán). The aim of this work is to present a conceptual framework to conduct a CEEA in eastern Salta and to present the evidences and existing methodologies to characterize the impacts of deforestation. The conceptual framework suggested depends on the quantitative characterization of the changes in the provision level of key ecosystem services as a function of the stress and/or disturbance level (in this case deforestation). Based on the literature and our own data, the effects of deforestation on four key ecosystem services have been assessed: C dynamics, energy balance and greenhouse gases emissions, water dynamics and landscape structure. Deforestation produced emissions of 2000 t of CH 4, 200 t of N 2O, above 20 Gg of C/year, a 1.1 watt/m2 reduction in reflected radiation and 4400 TJ radiative energy emissions caused by deforestation fires, increases in the risk of soil salinization and landscape fragmentation. Considering these aspects of the structure and functioning of the ecosystems provides objective elements to evaluate management alternatives and to elaborate monitoring programmes. To consider such management and monitoring alternatives arises technical challenges but also institutional and political ones

PELLETS DE KAOLIN POROSOS UTILIZADOS COMO SISTEMA DE LIBERACIÓN LENTA DE FEROMONA BENZALDEHYDE PARA CAPTURAR TRIATOMINOS

El objetivo de este trabajo es estudiar las propiedades de los gránulos de caolín porosos que se aplicarán como un sistema de liberación lenta de feromonas, para la captura de vectores de la enfermedad de Chagas.CONACYT – Consejo Nacional de Ciencia y TecnologíaPROCIENCI

Thinking pencils: a merging foundation between Gregory Bateson and Eliseo Verón

This paper seeks to present the contributions that Eliseo Verón has made to the field of communication. The originality of the paper lies in making reference to Gregory Bateson as the intellectual influence behind Verón´s academic legacy. This is not the conventional synthesis made when analyzing his work. The paper will be divided in three different parts: Ideas, Moments and Interpretant in accordance to the triadic line of thought that characterized Charles Peirce. The conclusions drawn from this analysis will allow us to appreciate the complexity of the ideas we are faced with when thinking about the future of our field.Fil: Fernandez Pedemonte, Damian Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Austral. Facultad de Comunicación. Dirección de Posgrado; ArgentinaFil: Jorge Artigau, Ana. Universidad Austral. Facultad de Comunicación. Dirección de Posgrado; Argentin

Remote sensing and cropping practices: a review.

For agronomic, environmental, and economic reasons, the need for spatialized information about agricultural practices is expected to rapidly increase. In this context, we reviewed the literature on remote sensing for mapping cropping practices. The reviewed studies were grouped into three categories of practices: crop succession (crop rotation and fallowing), cropping pattern (single tree crop planting pattern, sequential cropping, and intercropping/agroforestry), and cropping techniques (irrigation, soil tillage, harvest and post-harvest practices, crop varieties, and agro-ecological infrastructures). We observed that the majority of the studies were exploratory investigations, tested on a local scale with a high dependence on ground data, and used only one type of remote sensing sensor. Furthermore, to be correctly implemented, most of the methods relied heavily on local knowledge on the management practices, the environment, and the biological material. These limitations point to future research directions, such as the use of land stratification, multi-sensor data combination, and expert knowledge-driven methods. Finally, the new spatial technologies, and particularly the Sentinel constellation, are expected to improve the monitoring of cropping practices in the challenging context of food security and better management of agro-environmental issues.Made available in DSpace on 2018-01-31T23:57:48Z (GMT). No. of bitstreams: 1 2018001.pdf: 2502474 bytes, checksum: 56486e0a772111ad80472dd9f6791d76 (MD5) Previous issue date: 2018-01-24bitstream/item/171936/1/2018-001.pd