| Titre : | An historical account of the establishment of the "reserve naturelle de Roque-Haute" and its vegetation (1998) |
| Auteurs : | Louis Trabaud, Auteur |
| Type de document : | Article |
| Dans : | Ecologia Mediterranea (24(2) 1998) |
| Article en page(s) : | 173-177 |
| Résumé : | During the sixties and the development of the littoral Languedoc-Roussillon, the establishment of areas of protected biological interest (to be included in the development plan) were asked of the Mission Interministerielle pour l'Amenagement du Littoral Languedoc-Roussillon. Thus, fifteen sites to be protected were selected including the plateau of Roque-Haute and its ponds. A first working phase allowed identification of the areas and their scientific interest. The second phase was the mapping of plant communities at the cadastral level in order to establish what were the species to be protected. The final report delivered to the Mission for establishing the conservation documents, included the cartography, the cadastral survey and the owners names, and also the scientific arguments for allowing the preservation orders. Between the visits and surveys in the years 1964/65 (to obtain the scientific criteria for establishment of the conservation documents), a vegetation mapping, and a visit at the beginning of summer 1997, many changes have occurred in the terrestrial vegetation. At that time, the plateau was mainly covered by a low garrigue dominated by Cistus monspeliensis and Brachypodium retusum, kept in check by fire and grazing; human action was quite strong. The ponds were used by livestock for drinking and grazing. Now, the vegetation of the plateau constitutes a low garrigue in which Quercus ilex and Phillyrea angustifolia are dominant. Cistus is disappearing. Woody vegetation seems to be denser. The ponds which are not permanently full are encroached by trees of Ulmus campestris, Fraxinus angustifolia subsp. oxycarpa, Tamarix gallica (these two last tree species were not observed in 1964/65). The ponds with water in summer (deeper) are invaded by Typha angustifolia. |
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