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| Capelo, J.; Costa, José C.; Jardim, Roberto; Sequeira, Miguel; Aguiar, Carlos; Espírito-Santo, Dalila; Lousã, Mário. |
| The littoral geomorphology of the Porto Santo Island is of paramount importance in the coastal phytocoenosis assemblage: the southern part of the island has an 8 km long sand beach with littoral sandstone platforms in its eastern extreme; sandstone or volcanic (mostly trachits) sea cliffs predominate in the rest of the island; in the northern part of the island, near the airport, there is an elevated dune (more than 150 m above sea level), related to an ancient island tilt. In the Porto Santo' s beach and cliff ecosystems, we found four new associations. All of them are finicolous associations in the context of their alliances, with low floristic diversity and presided by small area endemics. |
| Tipo: Article |
Palavras-chave: Coastal vegetation; Porto Santo Island. |
| Ano: 2003 |
URL: http://hdl.handle.net/10198/5334 |
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| Capelo, J.; Mesquita, Sandra; Costa, José C.; Ribeiro, Silvia; Arsénio, Pedro; Neto, Carlos; Monteiro-Henriques, T.; Aguiar, Carlos; Honrado, João; Espírito-Santo, Dalila; Lousã, Mário. |
| An attempt to obtain a consistent spatial model of natural potential vegetation (NPV) for the mainland Portuguese territory is reported. Spatial modeling procedures performed in a Geographic Information System (GIS) environment, aimed to operationalize phytosociological expert-knowledge about the putative distribution of potential zona1 forest communities dominant in the Portuguese continental territories. The paradigm for NPV assumed was that of RIVAS-MARTINEZ (1976) and RIVAS-MARTINEZ et al. (1999), which presupposes, for a given territory, a univocal correspondence between a uniform combination of bioclimatic stage and lithology given a biogeographical context, and a unique successional sequence leading to a single climax community (i. e. a vegetation... |
| Tipo: Article |
Palavras-chave: Vegetation; Natural Potential Vegetation; Portugal; GIS. |
| Ano: 2007 |
URL: http://hdl.handle.net/10198/5379 |
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| Jardim, Roberto; Sequeira, Miguel; Capelo, J.; Aguiar, Carlos; Costa, José C.; Espírito-Santo, Dalila; Lousã, Mário. |
| Porto 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... |
| Tipo: Article |
Palavras-chave: Nitrophylous vegetation; Madeira. |
| Ano: 2003 |
URL: http://hdl.handle.net/10198/5355 |
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