Regional phytogeographic analysis of the flora of the Mounts of Saida (western Algeria):evaluation-restoration report.
A regional floristic and phytogeographic study was conducted in the Mounts of Saida, a sub-sector of the Tell Atlas (Oran) (O3), in the western Algeria. On an area of 56.31 Km2 surveyed regularly over time during the springs and autumns from 2017 to 2019. A total of 344 taxa divided into 77 families and 223 genera, including 18 new (exogenous) for Tell Atlas (Oran) sub-sector (O3), have been inventoried. Of these 18 species, 8 belong to the phytogeographic areas of the arid (H) and hyperarid (AS) regions and 2 invasive species that reinforce and confirm theories of plant dispersal to the north and to high altitudes for adapting to climate change. The Factor Analysis of Correspondences (F.A.C) shows that species distribution is the result of local microclimates associated with the elevation; particularly, the mountains facing north receive a significant amount of humidity from the Mediterranean Sea.