Approche écotoxicologique de l’étude du dépérissement du cèdre de l’Atlas dans la montagne d’Ain Mimoune

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Université Abbes Laghrour -Khenchela-
In Khenchela, the Atlas cedar is subject to a decline that is worsening in recent years. This situation is the result of the interaction of the biotic and/or abiotic stress factors causing the weakening of the tree and sometimes even its early senescence. The subject of this study is devoted to the analysis of the potential impact of barite deposits on the decline process and on the natural regeneration power of Atlas cedar in the Noughis, Ouled Yagoub and Chélia forests, located in Khenchela. We sampled cedar needles from three stations, on an assessment of chlorophyll contents, on a university pedagogical laboratory, where variations in levels between sampling stations were measured by using UV-Visible spectrophotometry. The results obtained shows important chlorophyll concentrations of cedar needles, near the barite processing industry. This study can be a basis for research of the controversial relationship between this endemic tree, which is a very important resource for the country, and the dust induced by industrial effluent deposition.