TAILIEUCHUNG - Báo cáo lâm nghiệp: "Canonical correspondence analysis for forest site classification. A case study* "

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế, đề tài: "Canonical correspondence analysis for forest site classification. A case study. | Ann Sci For 1996 53 981-990 Elsevier INRA 981 Original article Canonical correspondence analysis for forest site classification. A case study JC Gégout1 F Houllier2 1 Unite écosystèmes forestiers et dynamique des paysages 2 Unite dynamique des systèmes forestiers associée à I lnra laboratoire de recherches en sciences forestieres Engref 14 rue Girardet 54042 Nancy cedex France Received 3 May 1994 accepted 24 July 1995 Summary - Canonical correspondence analysis CCA is an exploratory statistical method that can be applied to the investigation of vegetation-environment relationships and to forest site classification studies. This paper illustrates with a case study some of its advantages over other widely used methods - ecological profiles and correspondence analysis of species abundance data I CCA is a global method adapted to the frequent situation characterized by many species and several ecological variables ii it makes it possible to underscore the influence of the ecological gradients eg water and nutrient availability on species distribution while eliminating undesirable side effects eg the silvige-netic state of the stands Hi it helps in selecting the ecological variables that are relevant for site classification iv it can be used to define synthetic indexes of the ecological optimum and amplitude of plant species and thus to obtain information on good bioindicator species. site classification data analysis ecological gradient soil-vegetation relationships Resume - Analyse canonique des correspondances et typologie des stations forestieres. Une étude de cas. L analyse canonique des correspondances ACC est une methode exploratoire d analyse des données qui pent ẽtre appliquée à 1 étude des relations entre le milieu et la vegetation ou pour élaborer une typologie des stations torestières. Cet article illustre sur un exemple quelques avantages de I ACC sur d autres méthodes classiques - 1 analyse íactorielle des correspondences d un tableau phytosociologlque les

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