[article]
| Titre : |
Heathy peatlands with Erica ciliaris in the southwestern Mediterranean area |
| Type de document : |
texte imprimé |
| Auteurs : |
Ulrich Deil, Auteur ; Antonio Galán de Mera, Auteur ; José Alfredo Vicente Orellana, Auteur |
| Année de publication : |
2010 |
| Article en page(s) : |
pp. 205-216 |
| Langues : |
Anglais (eng) |
| Catégories : |
[habitats/milieux] 3 - Landes, fruticées et prairies
[Espèces (in biblio)] Erica ciliaris
[Thèmes] Bassin méditerranéen
[Thèmes] Habitat naturel et semi-naturel
[Thèmes] Végétation
|
| Résumé : |
"Habitats with fens and brooks are very rare in the SW Mediterranean, but of high conservational value because they shelter the southernmost outliers of Atlantic phytogeographic elements. Field studies were undertaken in the Serra de Monchique in Southern Portugal and on both sides of the Straits of Gibraltar (the Campo de Gibraltar in Spain respectively the Tangier Peninsula in Morocco) and 27 phytosociological relevés from heathy peatlands are presented. They are discussed on the basis of a comparative constancy table in a broader geographical context, covering the whole distribution area of Erica ciliaris. Two figures illustrate the vegetation mosaic and the contact series. Heath vegetation on peaty soils in the study area belongs to an impoverished Genisto anglicae-Ericetum ciliaris, the central association of the Genistion micranthae-anglicae. The following subassociations and variants can be observed: 1) pinguiculatosum lusitanicae on wet open peat soil, 2) dittrichietosum viscosae subass. nov. on sites degraded by strong grazing and trampling (more common in Morocco), 3) an intact variant with Genista tridens and Stauracanthus boivinii, restricted to the Campo de Gibraltar, 4) a variant with Erica erigena, and 5) a variant with Stemmacantha longifolia and Schoenus nigricans, a transitions to a fen community. The comparison of Erica ciliaris heaths in SW Iberia and NW Morocco with those in NW Spain, Brittany and SW England showed that heath vegetation on peat soils (Genistion micranthae-anglicae and Ulicion minoris) has a clear azonal character. The increasing summer drought from Cornwall to the Tangier Peninsula is compensated by a shift to edaphic wet conditions. The phytogeographic contrast between the Eurosiberian and the Mediterranean area is reflected by transgressive species from the surrounding matrix vegetation." (source : auteurs) |
| Type de publication : |
périodique |
| Référence biblio : |
Deil U., Galán de Mera A., Orellana J., 2010 - Heathy peatlands with Erica ciliaris in the southwestern Mediterranean area. Braun-Blanquetia, 46 : 205-216. |
| ID PMB : |
71044 |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71044 |
in Braun-Blanquetia > n°46 (Année 2010) . - pp. 205-216
[article]
|
Heathy peatlands with Erica ciliaris in the southwestern Mediterranean area in Braun-Blanquetia, n°46 (Année 2010)