2.1. Localization
The province of Sidi Bel’Abbes, located in northwestern of Algeria,
occupies a privileged and strategic position, with an area of
approximately 9.3 km². The locality of Tenira distant of almost 30 km
from the south-east of the plain of Mekerra (Figure 1), between the
coordinates of Lambert between 0 ° 35’W and 0 ° 25’W of longitude and
between 34 ° 5’N and 35 ° 5 ’N of latitude. It covers 16.2 ha. The
observation of the digital terrain model (DTM) has shown that the
attitude of the forest of Tenira varies between 465 m and 1051 m. From
1985 to 2013, the forests of Sidi Bel’Abbes received an average annual
highest of about 490 mm and the lowest is of the order of 201 mm. In the
same period; mean monthly temperatures range from 16.1 ° C to 24.7 ° C
(Photos 3).