Loading...
4 results
Search Results
Now showing 1 - 4 of 4
- The vegetation of Madeira: II - woody caulirosetted communities of evergreen forest clearings: Euphorbion melliferae all. nova.Publication . Capelo, Jorge; Costa, José C.; Jardim, Roberto; Sequeira, Miguel; Aguiar, Carlos; Lousã, MárioThe endemic caulirosetted microphanerophytes [with a rosette of leaves on top of a long woody few-branched naked stem] – e.g. Euphorbia mellifera, Isoplexis sceptrum, Melanoselinum decipens, Musschia wollastonii and Sonchus fruticosus – are among the most striking plants of Madeira Island. They are often found in the "levadas" artificial system of channels that runs through the Ocotea foetens forest [Clethro arboreae-Ocoteetum foetentis]. These plants organize themselves in a particular phytocoenosis – Isoplexido sceptri-Euphorbietum melliferae ass. nova. – that reflects a worldwide recurrent phenomenon in forest ecosystems: the presence of plants adapted to cuts in the continuous crown layer of dense forest, such as dry ravines, forest clearings produced by tempests, landslides and other natural disturbances. "Levadas" are artificial simulations of these natural habitats.
- Catálogo sintaxonómico e florístico das comunidades vegetais da Madeira e do Porto SantoPublication . Costa, José C.; Capelo, Jorge; Jardim, Roberto; Sequeira, Miguel; Espírito Santo, Dalila; Lousã, Mário; Fontinha, Suzana; Aguiar, Carlos; Rivas-Martinez, Salvador
- The vegetation of Madeira: V - Lino stricti-Stipetum capensis, ass. nova and Vicio costei-Echietum plantagini, ass. nova, two new semi-nitrophylous associations from Porto-Santo Island (Archipelag of Madeira)Publication . Jardim, Roberto; Sequeira, Miguel; Capelo, Jorge; Aguiar, Carlos; Costa, José C.; Espírito Santo, Dalila; Lousã, MárioPorto Santo is a deeply eroded oceanic island. The human uses of the territory led to a massive destruction of its primitive vegetation cover and its substitution by new types of vegetation constituted by plants adapted to the novel perturbation regimes introduced by human settlers. A vegetation cover once dominated by trees or shrubs that evolved isolated from herbivory during millions of years, was replaced since the XV century by herbaceous anthropogenic vegetation, dominated by neophytes, adapted to perturbation events imposed by mammal herbivores (goats and rabbits) and by dry-farming agriculture (mostly barley). Agriculture and grazing together with low climatic precipitation levels promoted subnitrophylous types of herbaceous vegetation. So, today's Porto Santo vegetation is largely dominated by two, yet undescribed, herbaceous subnitrophylous phytocoenosis: Lino stricti-Stipetum capensis and Vicio costei-Echietum plantagini.
- Checklist da Flora de Portugal Continental, Açores e MadeiraPublication . Sequeira, Miguel; Espírito Santo, Dalila; Aguiar, Carlos; Capelo, Jorge; Honrado, João JoséEm Novembro de 2007 realizou-se uma reunião entre a Direcção da ALFA e Instituto da Conservação da Natureza e da Biodiversidade (ICNB). Ficou então decidido que a ALFA tomaria a seu cargo a elaboração da Checklist da Flora de Portugal (Continental, Açores e Madeira). Após quase 3 anos de trabalho, a ALFA apresentou publicamente a Checklist durante os VIII Encontros Internacionais de Fitossociologia – ALFA, que decorreram em Lisboa entre 13 e 16 de Setembro de 2010. A ALFA disponibiliza agora a todos os interessados a Checklist da Flora de Portugal (Continental, Açores e Madeira). Através da página http://www3.uma.pt/alfa/checklist_flora_pt/output_db.php podem ainda ser enviados comentários, sugestões ou correcções. A Checklist da Flora de Portugal (Continental, Açores e Madeira) foi formalmente adoptada pelo ICNB e será parte integrante do inventário da biodiversidade prevendo-se a sua integração no futuro Sistema de Informação do Património Natural (SIPNAT,www.icn.pt/sipnat).