Introduction to the Ecology and Cartography of Euphorbia resinifera O

The present study aims to investigate the distribution of a species endemic to the Béni Mellal region, Euphorbia resinifera, in order to determine some of the factors behind its distribution, and to map it in order to determine its range. To achieve these objectives, we used the two geographic information system software packages ARC GIS and QGIS, the Digital Earth Model and topographical maps to transcribe the data collected in the field. The results of the field investigations show that the distribution range of resinous spurge is discontinuous between 650 and 1100 m altitude. It occupies sunny locations on steep slopes and skeletal soils. Along its range from southwest to northeast, resinous euphorbia follows a climatic gradient that becomes wetter and cooler. It is thus accompanied by Acacia gummifera, Rhus pentaphylla, Ziziphus lotus, Olea europaea var Oleastre, Asparagus stipularus towards the South-West and Tetraclinis articulata, increasingly towards the North-East.