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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Fire effects on the composition of Pinus halepensis communities in the North of Bou-Taleb forest, Algeria
Auteurs :	Amar Madoui, Auteur ; Jean-Marie Gehu, Auteur ; Djamel Alatou, Auteur
Type de document :	Article
Dans :	Ecologia Mediterranea (32 2006)
Article en page(s) :	5-13
Résumé :	The effect of forest fire on the vegetation of the domanial forest of Bou-Taleb (Algeria) was studied in the Pinus halepensis ecosystems by the method of tables. These communities which were burned at different dates and other ones unburned (older) are located in north part of the forest. The comparative method showed a post-burn progressive recovery of vegetation without a great modification in their floristic composition. This post-fire recovery is realised by three groups of species : the first group, met in the young stages after fire, is dominated by therophytes; the second which characterizes the adult stages is represented essentially by perennials species (chamaephytes and phanaerophytes), and the last one represented by the species indifferent to fire is met at all the stages. A comparison between the different states using Sorensen coefficient shows a great difference between state II (4 years) and state IV (over 33 years) with 38.29%, so it reaches 59.37% between the states III and IV. However this similarity is more important when we exclude taxa which are present only one time (f > 1); in this case, it can reach the 73% between the states III and IV. This shows the role of exogenous species in post-burn recovery of Pinus ecosystems.

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