Mediterranean forests are found in the Mediterranean basin, California, the South African Cape Province, South and southwestern Australia and parts of Central Chile. They represent 1.8 % of the world forest areas of which the vast majority is found in the Mediterranean basin, where historical and paleogeographic episodes, long-term human influence and geographical and climatic contrasts have created ecosystemic diversity and heterogeneity. Even if evergreen is dominant, deciduous trees are also represented, with different forest types including dense stands with a closed canopy (forests sensu stricto) and pre-forestal or pre-steppic structures with lower trees density and height. The Mediterranean basin is also a hot spot of forest species and genetic diversity, with 290 woody species versus only 135 for non-Mediterranean Europe. However, the characteristics of the Mediterranean area (long-standing anthropogenic pressure, significant current human activity and broad biodiversity) make it one of the world’s regions most threatened by current changes. Four examples of Mediterranean forest types, present in south and north of the Mediterranean basin and more or less threatened, are developed in order to show that linking “hard sciences” and humanities and social sciences is necessary to understand these complex ecosystems. We show also that these forests, in spite of specific climatic constraints, can also be healthy and productive and play a major ecological and social role. Furthermore, even if the current human activity and global change constitute a risk for these exceptional ecosystems, Mediterranean forests represent a great asset and opportunities for the future of the Mediterranean basin
The Shoul oak grove is a forested ecosystem inherited from a Holocene phase of ecological optimum; its evolution, through the double geologic and human temporality, and in relation with several processes of degradation, led to the progressive loss of its environmental equilibrium and further to the reduction of its economic contributions. The fragility of these forests is the consequence of the convergence of two main factors, i) the intrinsic fragility of the forested environment based on an unstable balance between the tree, the leached soils and their moisture content ; ii) the anthropological action on the forest environment and its degradation with the change of its floristic composition.During the colonization the new context was at the origin of the new social and economic relation between the forest and the surrounding populations. The current use of this oak grove is in a classic scheme of the reports society / forest in Morocco. The population is especially of pastoral main activity in the bordering communes.But the oak groves of Mamora-Shoul are integrated into the area of influence of several cities, what exposes the forest to the risks of uncontrolled urbanization. These oak groves are thus in the centre of interest of several stakeholders with opposite behaviour and a new paradigm of relation rural/urban.Through a double approach, environmental and socio-economic, this paper will try to bring elements of answer by analyzing the interactions between a forest which reached an alarming threshold of degradation and a society affected by important changes in its modes of intervention and exploitation.Key words: Morocco, Atlantic Meseta, Shoul plateau, Forest management, water and soil conservation, assisted regeneration of cork oak. ResumenLos esfuerzos para dirección de bosque de alcornoque y sus efectos sobre conservación de suelo, la meseta Shoul, región de Rabat, Marruecos La arboleda de roble Shoul es un ecosistema arbolado heredado de una fase de Holocene de grado óptimo ecológico; su evolución, por la doble temporalidad geológica y humana, y en relación con varios procesos de degradación, conducida a la pérdida progresiva de su equilibrio ambiental y con relación a la reducción de sus contribuciones económicas. La fragilidad de estos bosques es la consecuencia de la convergencia de dos factores principales, i) la fragilidad intrínseca del ambiente arbolado basado en un equilibrio(saldo) inestable entre el árbol, los suelos leached y su contenido de humedad; ii) la acción antropológica sobre el ambiente forestal y su degradación con el cambio de su composición floristic.Durante la colonización el nuevo contexto estaba en el origen de la nueva relación social y económica entre el bosque y las poblaciones circundantes. El empleo corriente de esta arboleda de roble está en un esquema clásico de la sociedad de informes/el bosque en Marruecos. La población es sobre todo de actividad pastoral principal en las comunas de lindar.Pero las arboledas de roble de Mamora-Shoul son integradas en el área...
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