tailieunhanh - Báo cáo khoa học: "Preliminary dendroecological survey on pedunculate oak (Quercus robur L) stands in Tuscany (Italy)"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Preliminary dendroecological survey on pedunculate oak (Quercus robur L) stands in Tuscany (Italy). | Ann Sei For 1994 51 1-10 Elsevier INRA 1 Original article Preliminary dendroecological survey on pedunculate oak Quercus roburL stands in Tuscany Italy A Santini A Bottacci R Gellini Laboratorio di Botanica Forestale Dipartimento di Biologia vegetate Università di Firenze Piazzale delle Cascine 28 50144 Firenze Italy Received 22 February 1993 accepted 27 July 1993 Summary This paper studies the influence of climate on pedunculate oak radial growth in some stands of central Mediterranean Italy. Three populations growing along the course of the River Arno were selected. Core samples were measured and their growth curves standardized and modellized in order to isolate the climate signal. The response functions were calculated by orthogonal regression of the variables of the tree ring dependent variables and the climate explicative variables . This paper provides an eco-physiological analysis of the results This study helps us understand how the ecotype of the pedunculate oak has adapted to a Mediterranean climate where water supply Is a strong limiting factor. dendroecology pedunculate oak water supply Mediterranean forest eco-physiology Resume Observations dendroécologiques préliminaires sur des peuplements de chênes pédonculés en Toscane Italie . Le travail concerne I etude de I influence du climat sur la crois-sance radiale du chêne pédonculé dans I ltalie centrale. On a choisi et échantillonné 3 peuplements le long de I Arno. Les échantillons ont été mesurés et les courbes d accroissement ont été standardi-sées et modélisées dans le but d isoler le signal climatique. Les fonctions de réponse ont été calcu-lées par regression orthogonalisée entre la variable cerne variable dépendante et les variables cli-matiques variable explicative . Les résultats sont discutés du point de vue écophysiologique. Cette étude aide à comprendre comment des ecotypes de chêne pédonculé se sont adaptés au climat méditerranéen où la disponibilité de I eau est le facteur limitant le plus