Abiotic factors related to the incidence of the Austrocedrus chilensis disease syndrome at a landscape scale |
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Authors: | L La Manna SD Matteucci T Kitzberger |
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Institution: | 1. Laboratorio de Suelos, Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP) and Universidad Nacional de la Patagonia San Juan Bosco, Ruta 259 Km 4, C.C. 14, 9200 Esquel, Chubut, Argentina;2. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina;3. Grupo de Ecología del Paisaje y Medio Ambiente, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 3, Piso 4, 1428 Buenos Aires, Argentina;4. Laboratorio Ecotono, CRUB, Universidad Nacional del Comahue, Quintral 1250, 8400 Bariloche, Argentina |
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Abstract: | In this paper, the incidence of the A. chilensis disease syndrome in the “16 de Octubre” Valley (Chubut, Argentinean Patagonia) was related to landscape climatic, topographic and edaphic attributes, using remote sensing, geographic information systems and statistical methods. A strong relationship between the occurrence and incidence of the A. chilensis disease syndrome and site variables related to poor soil drainage was found. Non-allophanized soils with fine textures on flat and wavy soil phases, geomorphologies associated to alluvial processes, and low elevations and gentle slopes were positively related to the incidence of the disease. These relationships at a landscape scale agree with previous studies carried out at the stand level. A logistic predictive model of diseased occurrence was developed for the study area considering aspect, elevation, slope, mean annual precipitation and soil phase (classified according to predominant slopes). |
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Keywords: | Spatial distribution Soil Site Habitat model &ldquo Mal del cipré s&rdquo Phytophthora austrocedrae Patagonia |
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