tailieunhanh - Báo cáo lâm nghiệp: "Climatic signal in annual growth variation of silver fir (Abies alba Mill.) and spruce (Picea abies Karst.) from the French Permanent Plot Network (RENECOFOR)"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Climatic signal in annual growth variation of silver fir (Abies alba Mill.) and spruce (Picea abies Karst.) from the French Permanent Plot Network (RENECOFOR). | Ann. For. Sci. 64 2007 333-343 INRA EDP Sciences 2007 DOI forest 2007010 333 Original article Climatic signal in annual growth variation of silver fir Abies alba Mill. and spruce Picea abies Karst. from the French Permanent Plot Network RENECOFOR Francois LEBOURGEOIS UMR INRA-ENGREF 1092 - Laboratoire d Etude des Ressources Forêt-Bois LERFOB - Équipe Écologie Forestière 54042 Nancy Cedex France Received 23 May 2006 accepted 13 October 2006 Abstract - This paper explores the growth climate relationships in earlywood latewood and total ring-width chronologies of five Norway spruce Picea abies and six silver fir Abies alba stands sampled in the French permanent plot network RENECOFOR 327 trees . The relationships between climate and ring widths were analyzed using extreme growth years simple correlations and response functions analysis bootstrapped coefficients . Monthly climatic regressors were derived by a physiological water balance model that used daily climatic data and stand parameters to estimate soil water deficits. Pointer years underline the high sensitivity to winter frosts 1956 1986 and exceptional annual droughts 1962 1976 1991 for both species. For those years growth variations were higher for Abies alba than for Picea abies. For each species the climate information of tree ring series is not modified by local site characteristics altitude slope aspect soil water reserve . Moreover strong specific differences appear among species. Earlywood and latewood spruce growth mainly depends on current summer soil water deficit conditions. For silver fir winter and early summer temperatures as well as the water supply of the previous year August to October play a major role for the production of earlywood after which the current early summer water supply influences mainly latewood width. Abies alba Picea abies tree ring water balance drought pointer years response functions Résumé - Réponse au climat du sapin pectiné Abies alba Mill. et de l épicéa commun

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