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Aouadj Sid Ahmed

  • 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, 13 (1): 0163-0170

    Degdag Hanane, Boudouaya Manel, Aouadj Sid Ahmed & Bendimered-Mouri Fatima Zohra
    Effect of physico-chemical treatments on the vitality of Pistacia atlantica Desf. (Anacardiaceae) in Algeria: effect of provenances on germination and seed emergence
    https://doi.org/10.31396/Biodiv.Jour.2022.13.1.163.170

    ABSTRACT
    The Pistacia atlantica Desf. (Anacardiaceae) is widespread in North Africa, it is found in the Dayas, its extreme areas, in the form of sparse stands. It is a species that can constitute interesting populations in arid and semi-arid zones, hence the interest of studying the effect of provenances (25 regions of Algeria) on germination and seed emergence. In this context, 120 seeds were tested in the laboratory to know the effect of provenances on germination, the same procedure was used to know the effect of provenances on emergence (in the nursery). The seeds were divided into lots of 20 seeds (the number of replicates is 6 to reach the degree of freedom “DDL”). The results obtained show that the germination rate seems to be better for the provenances of Saida, Naama and EL Bayadh (≥ 90% for 45 days). On the other hand, the provenances of Relizane, Tlemcen, Guelema, Oued, Biskra, Ghardaia, Mascara, Bouira, Djelfa, Sidi Bel Abbes and Mesila give only very poor results (≤ 20%), while the other provenances give a medium result (≈ 50%). Regarding emergence, the provenances of Laghouat, Saida, Tiaret, Bechar, Naama and Batna give a good result (≥ 90%) while the result is very low for the provenances of Adrar, Biskra, Oued, Ghardaia, Mascara, Bouira, Relizane, Sidi Bel Abbes and Djelfa. In view of these results, the use of Pistacia atlantica in the restructuring of degraded arid spaces constitutes an interesting option and provides some answers to foresters in terms of the choice of provenance likely to be used in reforestation programs.