Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: "Relations cerne-climat dans des peuplements de Quercus afares Willd et Quercus canariensis Pomel en. | 347 Ann Set For 1997 54 347-358 Elsevier Inra Article original Relations cerne-climat dans des peuplements de Quercus afares Wind et Quercus canariensis Pomel en Algérie M Messaoudène L Tessier2 1NRF station régionale de Tizi BP 30 Yakouren 15365 Algérie 2 Imep faculte des sciences de Saint-Jérôme. c 451 13397 Marseille cedex 20 France Reel le 12 fevrier 1996 accepté le 10 juillet 1996 Summary - Tree-ring to climate relationships for populations of Quercus afares Wind and Quercus canariensis Pomel in Algeria. Ring-width variations are analysed on 15 populations of Quer-cus afares and Quercus canariensis in the Akfadou and Beni-Ghobri Forests Algeria fig 1 which are submitted to temperate and cool variants of the Mediterranean humid bioclimate. The populations selected are representative of the different ecological conditions substratum exposure altitude under which the two species are growing. After measuring ring-width on three radii per tree and eight to 16 trees per site a mean ring-width chronology is developed for each population table I . In order to remove age trend and isolate interannual variations of radial growth ring-width series are mod-elized using ARMA processes. For each population a mean chronology of residuals is established. Response function is then calculated involving the mean residual chronology as cependent variable and in a first step the 24 monthly parameters of annual climate as regressors P-T and P-Tmin The number of regressors is then reduced by grouping together the successive monthly values of the same sign. Response function is calculated for the period 1918-1951 where valuable meteorological data are available. The reliability of response function is tested using the bootstrap method. Results obtained from modelization table II show that radial growth is largely predetermined for both species. The amount of residual variance to be coưelated with climate is low this amount is lower for Q afares than for Q canariensis. .
