Abstract
Changes experienced in temperature, precipitation, demography and land coverage are the main themes studied in northwestern Patagonia, Argentina, which includes part of Neuquén, Río Negro and Chubut provinces. The precipitation shows important interannual variability and decreases during the warm semester. The mean minimum temperature in January in Neuquén city increased with statistical significance. Forests and steppe are the more important ecosystems of the area and the native forests of Nothofagus sp. are located mainly in protected areas like National or Provincial Parks. Twenty-eight percent of the Andean—patagonic forests are in the Río Negro province, while Neuquén province has 9% and Chubut province has 26%. The censuses of 1991 and 2001 showed that Los Lagos, Lacar, Picún Leufú and Cushamen are the counties with increasing population.
Highlights
Argentine Patagonia region includes the provinces Neuquén, Río Negro, Chubut, Santa Cruz and Tierra del Fuego
The topography of the study area is complex with a succession of valleys and mountains
In general the altitude increases towards the west but near some rivers and lakes, like Azul River and Puelo Lake, the height is low (200–300 m)
Summary
Argentine Patagonia region includes the provinces Neuquén, Río Negro, Chubut, Santa Cruz and Tierra del Fuego. Water has been the greatest limiting factor for this area, conditioning the development of the region. The population has settled near the watercourses to fulfill the main needs of potable water. The topography of the study area is complex with a succession of valleys and mountains. In general the altitude increases towards the west but near some rivers and lakes, like Azul River and Puelo Lake, the height is low (200–300 m). Some important cities are situated at 800 meters (San Carlos de Bariloche, San Martin de los Andes, Esquel, etc.) but they are located very near to mountains such as Tronador, Lanin and Fitz Roy which reach 3,000 meters
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