La selva paranaense mirando el cielo

Fil: Torrusio, Sandra Edith. Comision Nacional de Actividades Espaciales (CONAE). Buenos Aires; Argentin

Actualidad sobre las herramientas geoespaciales y su vínculo con la Entomología

Fil: Torrusio, Sandra Edith. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; Argentin

Aportes de los datos y de la información satelital a las inundaciones urbanas

Fil: Torrusio, Sandra Edith. Comisión Nacional de Actividades Espaciales (CONAE). Buenos Aires; Argentin

La calidad en los datos satelitales

Sumario: ¿Por qué se le presta actualmente tanta atención a la calidad del dato satelital? ¿Por qué es difícil establecer la calidad? El recorrido de los datos satelitales hasta las manos del usuario SST (Temperatura Superficial del Mar): ¿Medimos siempre lo mismo? ¿Qué necesita el usuario? Proveedor del dato vs Perspectiva del usuario En camino de mejorar la calidadInfraestructura de Datos Espaciales de la República Argentina (IDERA)Facultad de Ciencias Astronómicas y Geofísica

Evaluation of changes in atlantic forest (Valley of Cuña Piru, Misiones, Argentina) with multi-temporal satellite data

The forest in the province of Misiones, northeastern of Argentina, is a portion of Paraná Forest (or Atlantic Forest) located also in the south of Brasil and Paraguay. At the beginning of the last century the native forest had an extension of more than 100.000.000 ha. Actually, Brasil preserves only the 5% and Paraguay the 10% very spoiled and fragmented. In Argentina the decrease was the 45%, and keeps in existence 1.422.661 ha (National Forest Inventory 2003), with the higher values of biodiversity of the country. This area in Argentina has an accelerated rhythm of urbanization and deforestation. The productive system in the zone provides between 70% to 85% of wood to national market. Recent studies of diversity and dynamic of the native communities are very limited. For these reasons it’s necessary to increase the spatial information of the natural resources, the expansion of human activities and the disturbances in the environment to improve the management, the arrangement of territory and the tools for the decisions makers. The main objectives of this study were: to analysis spatial and temporally the structure and dynamic of forest in the Valley of Cuña Piru (sector of Atlantic Forest, Misiones), and to compare different methods and tools in order to develop an efficient and operative methodology for a systematic monitoring of the status/condition of the area, by mean of satellite images analysis (Landsat and Aster) and GIS techniques (modeling, mapping of changes, identification of plants structures and physonomy by different classification methods). The preliminary results showed an operative and efficient methodology with remote sensing tools for the forest monitoring and a preliminary protocol of processes was developed.Publicado en: ISPRS Archives – Volume XXXVII Part B7, 2008Laboratorio de Investigación de Sistemas Ecológicos y Ambientales (LISEA

Evaluation of changes in atlantic forest (Valley of Cuña Piru, Misiones, Argentina) with multi-temporal satellite data

The forest in the province of Misiones, northeastern of Argentina, is a portion of Paraná Forest (or Atlantic Forest) located also in the south of Brasil and Paraguay. At the beginning of the last century the native forest had an extension of more than 100.000.000 ha. Actually, Brasil preserves only the 5% and Paraguay the 10% very spoiled and fragmented. In Argentina the decrease was the 45%, and keeps in existence 1.422.661 ha (National Forest Inventory 2003), with the higher values of biodiversity of the country. This area in Argentina has an accelerated rhythm of urbanization and deforestation. The productive system in the zone provides between 70% to 85% of wood to national market. Recent studies of diversity and dynamic of the native communities are very limited. For these reasons it’s necessary to increase the spatial information of the natural resources, the expansion of human activities and the disturbances in the environment to improve the management, the arrangement of territory and the tools for the decisions makers. The main objectives of this study were: to analysis spatial and temporally the structure and dynamic of forest in the Valley of Cuña Piru (sector of Atlantic Forest, Misiones), and to compare different methods and tools in order to develop an efficient and operative methodology for a systematic monitoring of the status/condition of the area, by mean of satellite images analysis (Landsat and Aster) and GIS techniques (modeling, mapping of changes, identification of plants structures and physonomy by different classification methods). The preliminary results showed an operative and efficient methodology with remote sensing tools for the forest monitoring and a preliminary protocol of processes was developed.Publicado en: ISPRS Archives – Volume XXXVII Part B7, 2008Laboratorio de Investigación de Sistemas Ecológicos y Ambientales (LISEA

Mapping Marine Macrophytes along the Atlantic Coast of Tierra Del Fuego (Argentina) by Remote Sensing

A discontinuous series of rocky formations with variable dimensions exist along the intertidal zones in the eastern coast of Tierra del Fuego, Argentina, where an abundance of marine macrophytes grow, such as Macrocystis pyrifera forming subaquatic “forests”. This large amount of algae forms true fauna reservoirs and provide potential stocks for deriving industrial algae products. The purpose of this study is to map the undersea fauna resources by remote sensing and to evaluate the utilities of different remote sensors given the frequent cloud cover and the winter days with low sunlight. The data used include satellite imagery from Landsat, SAC-C, Aster, Radarsat and QuickBird, as well as aerial photographs and maps. We co-register them before actual mapping the algae distribution using different methods. The final maps illustrate the algae distribution and temporal change, which can be useful for managing the coastal environment and resources.Facultad de Ciencias Naturales y Muse

Risk factors for intestinal parasitoses among children and youth of Buenos Aires, Argentina

Introduction: Intestinal parasitoses affect millions of people worldwide, especially children of developing countries. In Argentina, the prevalence of these infections varies among areas according to socio-economic and climatic variability. This study aimed to evaluate the prevalence of intestinal parasitoses and risk factors in child and youth populations from neighbourhoods of La Plata (Buenos Aires province, Argentina) affected by occasional floods, including a serious flood in 2013. Methods: Serial stool samples and anal swabs of 398 individuals were processed using techniques of sedimentation and flotation. Socio-economic variables were surveyed using a semi-structured questionnaire and the land use/cover was determined by classification of a satellite image. Results: Of all examined individuals, 70.9% were parasitized by at least one of the 12 parasites identified. The most prevalent species were Blastocystis sp. (42.7%), Enterobius vermicularis (34.7%) and Giardia lamblia (17.6%). Infection risk factors included houses built with makeshift materials and dirt floors; lack of piped water and public waste collection service, bed-sharing and living in the non-urban area. >70.3% of the participants that lived within <200 m from watercourses or permanent water bodies were parasitized. Conclusion: This research shows that parasitic infections are still a serious public health problem and that they are strongly associated with socio-economic conditions and land use/cover. In this context, studies focused on One Health strategy are need to ensure the diagnosis and surveillance of parasitosis and to tackle zoonotic diseases as well as to encourage the development of sanitary and educational programs sustainable over time.Fil: Cociancic, Paola. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Torrusio, Sandra Edith. Comision Nacional de Actividades Espaciales; ArgentinaFil: Zonta, Maria Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Navone, Graciela Teresa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; Argentin

Influence of weather variables and plant communities on grasshopper density in the Southern Pampas, Argentina

A study was conducted to evaluate the influence of weather (precipitation and temperature) and plant communities on grasshopper density over a 14-year period (1996-2009) in Benito Juárez County, Southern Pampas, Argentina. Total density strongly varied among plant communities. Highest values were registered in 2001 and 2003 in highly disturbed pastures and in 2002 and 2009 in halophilous grasslands. Native grasslands had the lowest density values. Seasonal precipitation and temperature had no significant effect on total grasshopper density. Dichroplus elongatus (Giglio-Tos) (Orthoptera: Acridoidea), Covasacris pallidinota (Bruner), Dichroplus pratensis Bruner, Scotussa lemniscata Stål, Borellia bruneri (Rehn) and Dichroplus maculipennis (Blanchard) comprised, on average, 64% of the grasshopper assemblages during low density years and 79% during high density years. Dichroplus elongatus, S. lemniscata and C. pallidinota were the most abundant species in 2001, 2002 and 2003, while D. elongatus, B. brunneri and C. pallidinota in 2009. Dichroplus elongatus and D. pratensis, mixed feeders species, were positively affected by summer rainfall. This suggests that the increase in summer precipitation had a positive effect on the quantity and quality forage production, affecting these grasshopper populations. Scotussa lemniscata and C. pallidinota were negatively affected by winter and fall temperature, possibly affecting the embryonic development before diapause and hatching. Dichroplus elongatus and D. pratensis were associated with highly disturbed pastures, S. lemniscata with pastures and B. bruneri and D. maculipennis with halophilous grasslands. Covasacris pallidinota was closely associated with halophilous grasslands and moderately disturbed pastures. Weather conditions changed over the years, with 2001, 2002 and 2003 having excessive rainfall while 2008 and 2009 were the driest years since the study started. We suggest that although seasonal precipitation and temperature had no significant effect on total grasshopper density, these weather variables and plant communities had differential influence on the dominant grasshopper species.Centro de Estudios Parasitológicos y de VectoresLaboratorio de Investigación de Sistemas Ecológicos y AmbientalesFacultad de Ciencias Naturales y Muse