Urbanizaciones: Die Entstehung städtischer Lebensräume aus der Halbwüste
Between 1996 and 2006 flora and vegetation of settlements ("urbanizacions") on Fuerteventura were investigated and documented by plant sociological releves. On Fuerteventura a new type of urban landscape (so called 'intercity') is developing from densely built-up new settlements which are connected by roads and ephemeral stream channels. The results found so far can be set as hypotheses which should be proven by investigations of other cities and urbanizaciones of the semiarid Canary Islands: - Due to the forced mechanic disturbances of the indigenous vegetation, first the stem succulents diminish and stress resistant endemic species are selected, but no neophytes. - In and around the villages of the traditional agricultural areas some Mediterranean species like Chrysanthemum coronarium have accumulated. They are missing in the "urbanizaciones". - Species having mesomorphous leaves and larger leaf laminae accumulate inside the settlements. - A larger input of neophytes occurs especially in watered tree nurseries as well as by plants running wild from gardens. - Most of the neophytes of South American origin are only able to establish themselves in areas with a comparatively high supply of water. - Australian species like Acacia cyclops, Atriplex semilunaris, Atriplex semibaccata, and Maireana brevifolia are able to settle on areas which are not watered. - The network of roads and beds of the ephemeral stream channels enhances via transport of soils a relatively quick exchange of alien plants.
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