مؤسسة الشرق الأوسط للنشر العلمي
عادةً ما يتم الرد في غضون خمس دقائق
This study was conducted with the aim of identifying the Juniperus Macrocarpa trees on the natural regeneration, which are found on sand dunes threatened by human activities and changes in environmental conditions caused by wind, drought, erosion and increased soil salinity, and their impact on its reproduction and growth equations for the Adlis area west of Derna city, where the Juniperus Macrocarpa exists naturally but unfortunately in poor condition. The area is very small, and we believe it is the only area where this species is found in North Africa. Two sites 1 and 2 were selected and each was divided into two sectors A and B. The area of each sector was 500 m2 and the Juniperus Macrocarpa trees and seedlings were counted within each sector (total number of individuals) Calculate the crown coverage of the Juniperus Macrocarpa in %. And calculate the crown coverage of coexisting vegetation in the sector (%). Then we calculated the number of the Juniperus Macrocarpa seedlings in four visits (Annual visit) (2019/2022) to the both sites 1 and 2, and in the four visits the number of seedlings was (0) with the most of the trees are in poor condition of total and partial cutting of trees, burning and emergence of roots due to dredging, sand and grazing. The density of trees in site 1 is higher than site 2, but it has no effect on natural regeneration, and all the trees in both sites are old and there are no young individuals, thus limiting the ability of this species to produce new individuals and continue its growth to reach advanced stages of age, which leads to the extinction of this species at any time in the area.