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Tir Elhadj

  • Biodiversity Journal, 12 (4): 0847-0853

    Tir Elhadj, Haddouche Driss, Nouar Belgacem & Maamar Benchohra
    Spatial analysis of the regeneration after fire in forest of Lardjem (Wilaya of Tissemsilt, Algeria)
    https://doi.org/10.31396/Biodiv.Jour.2021.12.4.847.853

    ABSTRACT
    The present study aims to characterize the changes that have occurred in the Lardjem forest (Wilaya of Tissemsilt, Algeria) after four years of disastrous fire passage in 2012. The methodological approach adopted is essentially based on the analysis and interpretation of Normalized Difference Vegetation Index (NDVI). The approach is based on the analysis of satellite data into classes taken before and after the fire (1987–2016) associated with field checks. The results, validated against ground-truth data, show a considerable reduction in the forest class with 81.72% and the maquis class with 48.48%. On the contrary, it has been shown that the area of clear maquis and empty area increased with a rate of 117.11% and 39% respectively. The different mutations between the occupancy classes before and after the fire show that the forest stratum of wild Thuja Tetraclinis articulata (Vahl) Mast has recovered its appearance with a very low percentage. This recovery is more significant as soon as the conditions are favorable (northern slope, weak slopes and humidity).The parts covered by the tree stratum are transformed into clear maquis, matorrals and empty soils, these classes can reach a more advanced stage if the zone is moved away to repetitive fires in the coming years. Finally, a repopulation of the empty parts associated with a management and protection plan is necessary to safeguard the perinity of this forest.

  • Biodiversity Journal, 12 (1): 0129-0138

    Nouar Belgacem, Hasnaoui Okkacha, Maamar Benchohra & Tir Elhadj
    Inventory, diversity and therapeutic uses of medicinal plants in the Tiaret Mountains (western Algeria)
    https://doi.org/10.31396/Biodiv.Jour.2021.12.1.129.138

    ABSTRACT
    This study is devoted to the floristic (systematic, biology, chorology) and therapeutic (treated uses and diseases) analysis of medicinal plants in the Tiaret Mountains (western Algeria). The floristic inventory allowed us to identify 108 medicinal plants belonging to 41 families, including the dominance of the Asteraceae, Lamiaceae, Fabaceae and Orchidaceae with (15.7%, 7.4%, 5.6%, 5.6%) respectively. Also we identified 3 endemic, 4 rare and 8 protected species. The biological spectrum of these species is characterized by a high presence of the Therophytes (38%) followed by the Phanerophytes (20.4%). In biogeographical terms, Mediterranean biogeographical species are the most represented and make up more than half of the medicinal flora (52.8%). These plants are mainly used in order of importance in the treatment of the digestive tract, cardiovascular and dermal diseases with percentages of 18.6%, 10.7%, 7.5%.