Original Article

Evaluation by prediction of the natural range shrinkage of Quercus ilex L. in eastern Algeria


Department of Biology, Faculty of biological Sciences and Agriculture Sciences, Mouloud Maamri University, Tizi Ouzou, Algeria


Department of Life Sciences and Nature, Sciences and Technologies Institute, Abdlahfid Boussouf University Center, Mila, Algeria


Unit for Modelling of Climate and Biogeographical Cycles, Department of Astrophysics, Geophysics and Oceanography, University of Liège, Liège, Belgium


Department of agronomic sciences, Faculty of Agronomic Sciences, University of Mohamed Kheidar, Biskra, Algeria


Department of Life and Nature Science, Faculty of Life and Nature Sciences, Mohamed Boudiaf University, M’Sila, Algeria

FORESTIST 2018; 68: 7-15
DOI: 10.5152/forestist.2018.002
Read: 1596 Downloads: 580 Published: 18 December 2019

The aim of this study was to evaluate by prediction of the spatial distribution of Quercus ilex L. in its natural range in eastern Algeria. The maximum entropy method was used for modeling the species in potentially favorable areas under environmental conditions by linking the spatial occurrence and the environmental conditions. The following three explanatory parameter groups were used for the modeling: i) edaphic variables, ii) variables related to topography, and iii) climatic variables. The established predictions demonstrated that over the horizons 2050 and 2070, we shall lose 125,000 and 147,000 hectares, respectively. The most favorable areas for Q. ilex L. would appear to extend between the elevations of 1430 m by 2050 and reach 1650 m by 2070. The performance of the model used in this study was confirmed by the AUC (area under the curve) value of 0.929. The high elevations, especially those of the Saharan Atlas, would offer climatic refuges. These results represent a decision support tool for designing the best strategy of sensitization. and planning for the conservation of the holm oak. 

Cite this paper as: Tabet, S., Belhemra, M., Francois, L., Arar, A., 2018. Evaluation by prediction of the natural range shrinkage of Quercus ilex L. in eastern Algeria. Forestist 68(1): 7-15

EISSN 2602-4039