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Hasnaoui Okkacha

  • Biodiversity Journal, 14 (1): 0185-0194

    Hasnaoui Okkacha, Bessaid Farah, Bourouaha Mohamed, Babali Brahim, Aouadj Sid Ahmed & Khatir Hadj
    Post-fire dynamics of the forest formations in the mounts of Tlemcen (Western of Algeria): Case of the Forest of Zarifet
    https://doi.org/10.31396/Biodiv.Jour.2023.14.1.185.194

    ABSTRACT
    A study on the post-fire dynamics of plant species in the Zarifet forest (National Park of Tlemcen, north-western Algeria) was conducted after a violent fire that destroyed more than 200 hectares in the month of October 2016. Floristic records were done at a control site and the burned area during the phenological period, which extends from 2017 to 2019. The analysis of the floristic succession indicated a continuum of population dynamics over the three years after the fire. The results showed that the number of species found in the burnt sites reached 52 species (39%) after 8 months from the initial fire and 121 of them (91%) at three years afterward. The natural regrowth of the vegetation in the Tlemcen Mountains is typical of the “tiger bush”. The competitivity between the different species has been highlighted in the present study. The most competitive species in the post-fire occupation of the soil are stump-rejecting species and geophytes one, such as Quercus ilex, Chamaerops humilis, Calicotome intermedia, Asparagus acutifolius, Ulex boivinii, Drimia maritima, Cistus sp., Stipa tenacissima and Ampelodesmos mauritanicus. The analysis of the frequency indices (F.I.) seem to be in favor of an expanding tendency of these taxa.

  • 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%.