Temporihygrophilous Quercus broteroi forests in southern Portugal: Analysis and conservation

• Autor(a) principal: Vila-Viçosa, Carlos
• Data de Publicação: 2012
• Outros Autores: Mendes, Paula, Del Rio, Sara, Meireles, Catarina, Quinto-Canas, Ricardo, Arsénio, Pedro, Pinto-Gomes, Carlos
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10174/7349; https://doi.org/10.1080/11263504.2012.678402
• topic: Biodiversity conservation; hierarchical cluster analysis; phytosociology; Quercus broteroi woodlands; Vale do Guizo formation

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.