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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Phytoecological consequences of a sand dune restauration with tamaris (Tamarix gallica L.), in Algeria (2002)
Auteurs :	Kheloufi Benabdeli, Auteur ; Halima Mohammedi, Auteur ; Noreddine Letereuch-Belarouci, Auteur
Type de document :	Article
Dans :	Ecologia Mediterranea (28(2) December, 2002)
Article en page(s) :	93-99
Résumé :	The use of Tamarix gallica as biological sand binder provides interesting results from anecological and economical point of view. These species induces also a valuable biomass. Increased contribution of Saharo-sindian species balance the decrease role of ubiquitous species, but Mediterraneen species stay relatively constant. An appreciable increase of species number can be seen as composed to the control plot; increase from 6 to 12, for genera, and from 9 to 15 for species. A dynamic process and fluctuation for species in each biogeographic element are then documented. The number of genera greatly depends on species fluctuations witch are under the effect of many parameters not always under control. In such a situation, it is obvious that the fencing system play a determinant role in the restoration process. Dendrometric parameters witch permit the evaluation of woody biomass production and itsevolutionare number of shoot by plant, the height mean, the diameter and ground cover. Quantification of these parameters at differents stages shows an increase of shoot number per hectare (density), and an increase of the annual mean height by 56 centimeter. The diameter at 1.30 meter show also an increase of 0.57 cm witch correspond to an annual mean increase of its cover of 0.00709 m(2). With a mean plantation density of 1600 plants per hectare, Tamarix gallica induces a annual production of ligneous matter of 0.28 m(3) per hectare, i.e. an annual increase of 0.31 m(3) per hectare. This production would contribute to solve some needs of fuel wood, and should benefit the ecosystem mainly because of its use by local population. The combinaison of fencing system and plantation of woody species, as Tamarix, permit to yield appreciable results. This ligneous plant with its rapid growth allow the establishment of a favorable microclimate, and the establishment of a herbaceous stratum could play an important role in the dune stability and the evolution of this ecosystem. Local population takes care of fencing audits maintenance, because of wood and animal feed produced in return of their participation of the protection process.

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