Vegetation cover and human impact. A comparison of the Almarchal region (Campo de Gibraltar, Spain) and the Tangier Hinterland (Moroco)

摘要: The effects of different human impact on the vegetation cover are studied by comparing Southwestern Andalusia and Northwestern Morocco. peninsulas both sides Straits Gibraltar have almost identical physical conditions, but they submitted to land use systems. study was carried out in a phytosociological approach at levels "plant community" "vegetation complex". floristic identity is demonstrated example an endemic plant community, Trifo micheliani-Oenanthetuni fi.stulosae, which described here. Weed communities vary according agrotechnical level. Traditional ploughing selfsustaining agriculture creates agro-phytocoenoses with high alpha-diversity. Agroindustrial management, as it prevails Spain, halves species number per field. anthropogenetic transformation weed has similar tendency countries, time lag In heathiand, anthropo-zoogenetic pressure higher result mono-dominated stands low complexes descibed two coastal hill regions, Gaditanian Almarchal area Tingitanian Fahs area. Every technological level specific its own complex. Character for Spanish respectively Moroccan side can be established. "Modernization" landscapes results more trivial cover. landscape affects way.