TAILIEUCHUNG - Báo cáo lâm nghiệp: "Short-term effects of fire on plant cover and soil conditions in two Austrocedrus chilensis (cypress) forests in Patagonia, Argentina"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: "Short-term effects of fire on plant cover and soil conditions in two Austrocedrus chilensis (cypress) forests in Patagonia, Argentina" | Ann. For. Sci. 63 2006 63-71 INRA EDP Sciences 2006 DOI forest 2005098 63 Original article Short-term effects of fire on plant cover and soil conditions in two Austrocedrus chilensis cypress forests in Patagonia Argentina M. Florencia URRETAVIZCAYAa b Guillermo E. DEFOSSÉa b Héctor E. GONDAa a Centro de Investigación y Extensión Forestal Andino Patagónico CIEFAP and Universidad Nacional de la Patagonia Ruta 259 km 4 9200 Esquel Chubut Argentina b Consejo Nacional de Investigaciones Cientííicas y Técnicas de Argentina CONICET Argentina Received 4 October 2004 accepted 5 July 2005 Abstract - Early post-fire effects on plant cover in soil temperature 0 5 20 and 30 cm depth and moisture 0-16 20-36 and 40-56 cm depth were analyzed for two years in two cypress stands in Patagonia Argentina. Each stand Trevelin xeric and Bolsón mesic contained three treatments unburned UN partially PB and completely burned CB . In Trevelin 4 and 6 years after fire understory cover increased CB PB UN and overstory decreased CB PB UN related to the burning treatment. In Bolsón one year after fire all treatments had similar under- and overstory cover but were similar to Trevelin two years later. Soil temperature was significantly different PB CB UN at all depths and dates only in Trevelin. Soil moisture was significantly higher in the burned treatments of both stands. While plant cover might have protective effects and soil water appears as not limiting high soil temperatures seem to be detrimental for post-fire cypress establishment especially in xeric sites. Austrocedrus fire soil temperature-moisture southern temperate forest establishment Résumé - Les effets du feu à court terme sur la couverture végétale et sur les conditions du sol dans deux forets d Austrocedrus chilensis cyprès en Patagonie Argentine. On analyse ici les effets du feu à court terme sur la couverture végétale la température 0 5 20 et 30 cm de profondeur et l humidité du sol 0-16 20-36 et 40-56 cm de profondeur

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