Geoökologische Gefügemuster in Süd-Marokko ; Arbeit im Forschungsprojekt Mobilität aktiver Kontinentalränder ; Geoecological structural patterns in Southern Morocco
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Medientyp:
E-Book
Titel:
Geoökologische Gefügemuster in Süd-Marokko ; Arbeit im Forschungsprojekt Mobilität aktiver Kontinentalränder ; Geoecological structural patterns in Southern Morocco
Beteiligte:
Zillbach, Käthe
[VerfasserIn]
Erschienen:
Selbstverl. d. Inst. f. Physische Geographie, FU, Berlin, 1984
Anmerkungen:
Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
Beschreibung:
[contains map: Geoecology of Ouarzazate] ; [contains map: Geology of Ouarzazate] ; Summary: The structural pattern of the small and large-scale, local and regional vegetation conditions in the Ouarzazate basin was investigated. The objective was to map the vegetation as an integrating indicator of the different geoecological site types and the structural units of relief. From these results a generalized model in the form of a catena and a map of the geoecological structural pattern were obtained. The main factor influencing the basin is its arid climate, causing a dry steppe vegetation and the almost total lack of soil formation. Results show that the uniformity of the vegetation in the study area is mainly due to anthropogenic influences (extensive goat and sheep pasturing). The Haloxylon articulatum - type of vegetation prevails on all the older, gently sloping glacis plains covered with mainly loamy sands containing much stony material. Neither the westeast differentiation of rainfall and temperature conditions, relief—linked climatic factors, age, various climate-genetic and tectogenetic processes during the formation of the glacis plains overlying the Mio—Pliocene basin sediments nor the sediments themselves produced any variation in this vegetation. The only differentiation in the Haloxylon articulatum vegetation was a decrease in density corresponding to increasing silt and clay content of the subsoil. However, this decrease ist not linked to geomorphological or geological basement structures. The main type of vegetation in the basin has only a limited pasture value and is only grazed by goats for lack of better fodder. The Ouarzazate basin thus possesses only a low potential as pasture land. Small-scale variations in the Haloxylon type of vegetation are mainly due to relief—based variations in habitat. Shallow drainage-ways and depressions filled with sandy-clayey to sandy-silty loam containing little stony material have a generally thick plant cover with Artemisia herba—alba predominating. Since this ...