| Titre | Seuils biologiques et limites climatiques en Méditerranée occidentale / Biological thresholds and climatic limits in the western Mediterranean | |
|---|---|---|
| Auteur | Michel Lecompte | |
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Revue |
Géocarrefour Titre à cette date : Revue de géographie de Lyon |
| Numéro | volume 73, no 1, 1998 Varia | |
| Page | 33-43 | |
| Résumé anglais |
The study of a whole set of phytoclimatic transects surrounding the Western Mediterranean in Morocco, Portugal, France and Tunisia leads to the theory of hydro- climatic thresholds of vegetation. This may explain the transition of mediterranean to peripheral (atlantic or arid) flora. The biological implications of such thresholds can be compared with those of the temperature threshold of forest vegetation related to altitude or atitude, and also possibly with those of the precipitation threshold of tropical vegetation, shown indirectly by the remote sensing of photosyn- thetic activity. Hydrous thres- hod, indicated by changes in vegetation, do not always coincide with zonal modifications of the seasonal rainfall regime. In contrast, as has been shawn in dynamic climatology, orographie analysis plays an essential role in their precise location. Source : Éditeur (via Persée) |
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| Article en ligne | http://www.persee.fr/web/revues/home/prescript/article/geoca_0035-113x_1998_num_73_1_4801 |
