tailieunhanh - Báo cáo khoa học: "The influence of fire on the seed bank in the soil of a Quercus faginea forest (NW Spain)"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: The influence of fire on the seed bank in the soil of a Quercus faginea forest (NW Spain). | Ann. For. Sci. 56 1999 249-258 Inra Elsevier Paris 249 Original article The influence of fire on the seed bank in the soil of a Quercus faginea forest NW Spain Leonor Calvo a Baudilio Herrerob Felipe Bravoc Area de Ecologia Facultad de Biologia Universidad de León 24071 León Spain b Dpto. de Ciencias Agroforestales Escuela Técnica Superior de Ingenierias Agrarias Universidad de Valladolid 34004 Palencia Spain c Dpto. de Producción Vegetal y Silvopascicultura Escuela Tccnica Superior de Ingenierfas Agrarias Universidad de Valladolid 34004 Palencia Spain Received 22 October 1997 accepted 13 October 1998 Abstract - A study was carried out on the effect of a fire on the seed bank of a Quercus faginea forest situated close to the town of Palencia NW Spain . Soil samples were taken at two depths upper layer at 0-2 cm and deeper at 2-5 cm in a burned area and in one nearby which did not suffer from the fire. The specific richness values obtained 2 years after the fire in samplings carried out in the field as well as the soil seed bank were higher in the burned area than the control. The number of germinated seeds was also higher in the burnt area than the control and more abundant in the surface stratum than the deeper one in both areas. In the control area the richness was 33 species while in the burned area the richness was greater by five species. On the other hand the cover value was 58 in the burned area and 61 in the control area. Inra Elsevier Paris. fire seed bank Quercus faginea I germination northern Castilla Resume - Influence du feu sur le stock de semences dans le sol d une foret de Quercus faginea du Nord-Ouest de 1 Espagne. On a étudié I effet d un incendie sur le stock de semenccs d une foret de Quercusfaginea située à Palencia NW de 1 Espagne . Pour atteindre cet objectif on a pris deux series d echantillons du sol respectivement à deux niveaux de profondeur 0-2 cm et 2 5 cm dans une zone brũlée et dans une zone avoisinante non incendiée. Deux ans après I