The Thermo-Mediterranean biotopes of the Oued Laou basin : a landscape approach

Abstract

The Oued Laou basin in northwest Morocco constitutes a range of geological, geomorphological, hydrological and microclimatic regions. As a result, the vegetation in the area can be divided into different zones, corresponding largely with altitude, within which a variety of floral patterns emerge. A number of research stations were identified across the Thermo-Mediterranean zone of the basin, with a view to assessing the different biotopes and floral assemblages present, based, in particular, on dominant, characterising and indicators species. Diptera were also sampled in order to establish whether the biotopes at the different research stations were colonised by stenotopic species. The results provide a baseline record of the situation at present. As expected, water flow through the oued was found to be a key factor in determining vegetation composition and extent. Indicators of disturbance, both natural and anthropogenic, were also identified. The findings could be incorporated into a future landscape baseline, which would have utility for monitoring purposes, particularly given ever-increasing pressures on the natural environment.