Temporihygrophilous Quercus broteroi forests in southern Portugal: Analysis and...

• Author(s): Vila-Viçosa, Carlos ; Mendes, Paula ; Del Rio, Sara ; Meireles, Catarina ; Quinto-Canas, Ricardo ; Arsénio, Pedro ; Pinto-Gomes, Carlos
• Date: 2012
• Persistent ID: http://hdl.handle.net/10174/7349
• Origin: Repositório Científico da Universidade de Évora
• Subject(s): Biodiversity conservation; hierarchical cluster analysis; phytosociology; Quercus broteroi woodlands; Vale do Guizo formation
• Document Type: Article
• Language: English

Description

This article deals with a phytosociological survey of marcescent Portuguese oak (Quercus broteroi) forests in southern Portugal, and presents the results of an analysis of 56 releve´s, combining Braun–Blanquet’s methodology with hierarchical cluster analysis (Ward’s Hierarchical Clustering, based on Bray–Curtis distance). From these results, a new temporihygrophilous Portuguese oak forest association is described. Largely thermomediterranean, upper dry to subhumid, Ulici welwitschiani–Quercetum broteroi occurs on limestone soils within the Coastal Lusitan-Andalusian Province. Its high conservation value – mainly due to its rarity and floristic structure – supports this forest’s integration in Habitat 9240 (Annex B-I from Council Directive 92/43/EEC) in order to ensure its preservation. Based on the results, new biogeographic borders for the Ribatagan-Sadensean Sector are proposed.