tailieunhanh - Báo cáo lâm nghiệp: "Assessing the nutritional and climatic response of temperate tree species in the Vosges Mountains"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài:"Assessing the nutritional and climatic response of temperate tree species in the Vosges Mountains" | Ann. For. Sci. 62 2005 761-770 INRA EDP Sciences 2005 DOI forest 2005068 761 Original article Assessing the nutritional and climatic response of temperate tree species in the Vosges Mountains Paulina E. PINTOa b Jean-Claude GÉGOUTa a Laboratoire d Etude des Ressources Forêt-Bois ENGREF 14 rue Girardet CS 4216 54042 Nancy Cedex France b Departamento de Ciencias Forestales Facultad de Agronomía e Ingeniería Forestal Pontificia Universidad Católica de Chile Casilla 306 Correo 22 Santiago Chile Received 21 February 2005 accepted 16 June 2005 Abstract - Tree species distribution according to climatic gradients is often analysed through geographic information systems modelling whereas their nutrient requirements is mainly studied by experimentation. Using 325 forest plots this study analysed the response of frequent tree species in the Vosges mountains a siliceous area in northeast France along both climate and nutrient gradients. Besides a better understanding of species behaviour our aim was to investigate if indicator plants can be used to accurately estimate species response to ecological factors. Results showed a main effect of climate on Abies alba and Quercus petraea with a transition between both species around -20 mm of June water balance. They also showed a combined effect of climate base saturation and nitrogen nutrition on Acer pseudoplatanus Carpinus betulus Fraxinus excelsior and Pinus sylvestris distribution. Nutritional and climatic variables estimated by Ellenberg indicator values or those established with the phytoecological database EcoPlant are almost as efficient as measured variables to assess tree species ecological response. natural forest nutrient availability climate generalized linear models ecological niche Résumé - Effet du climat et de la nutrition minérale sur la distribution des essences dans le massif vosgien. Le lien entre la distribution des essences forestieres et les gradients climatiques est souvent analyse à partir de .