Encontrados 6 documentos, a visualizar página 1 de 1
Seleção de espécies lenhosas adequadas às técnicas de engenharia natural
Bifulco, Carlo; Rego, Francisco CastroSoil bioengineering was developed in central Europe after World War II and in Mediterranean Europe in the last twenty years; soil bioengineering has been recently applied also in Portugal suggesting its potential future development. Soil bioengineering, to consolidate and stabilize sliding down slopes, uses indigenous trees and shrubs with good vegetative propagation. A key feature of these species, employed as...
A fileira do papel e do cartão e a fileira das embalagens: análise de contexto
Louro, Graça; Constantino, Luís; Leal, Luís; Gravato, António; Rego, Francisco CastroThe present work describes and analyses the context of the paper and paper board sector and that of wood, paper and paper board wrapping and packaging sector, integrating the phases of industrial transformation up to the final products. The production flows are characterized, as well as the structure of the enterprises and workforce at the different phases of the productive cycle. The specificities associated w...
Avaliação da produção primária líquida em povoamentos puros e mistos de Quercus...
Nunes, Leónia; Magalhães, Marco; Patrício, Maria do Sameiro; Luís, Jaime Sales; Rego, Francisco Castro; Lopes, DomingosWith this study we quantified Net Primary Production (NPP) of Pinus pinaster and Quercus pyrenaica pure and mixed stands. This evaluation was based on sampling plots from the last National Forest Inventory and is exclusively located in the district of Vila Real. Results from this study allowed the first NPP figures for these kind of forest stands, and thus the quantification of these ecosystems potential for se...
Alterações da diversidade de espécies arbóreas nos povoamentos florestais entre...
Godinho-Ferreira, Paulo; Azevedo, Anamaria; Rego, Francisco CastroAbstract. Percentage of basal area was used to evaluate tree species diversity in forest stands from 1995 and 2005 National Forest Inventories sample plots. The analysis was carried out at the PROF region level (Forest Management Regional Plans) and statistical Chi-square test was performed to verify if the changes occurred between 1995 and 2005 in the distribution of the number of tree species per sample plot ...
Size-dependent pattern of wilfire ignitions in Portugal: when do ignitions turn...
Moreira, Francisco; Catry, Filipe X.; Rego, Francisco Castro; Bacao, FernandoNot all wildfire ignitions result in burned areas of a similar size. The aim of this study was to explore whether there was a size-dependent pattern (in terms of resulting burned area) of fire ignitions in Portugal. For that purpose we characterised 71,618 fire ignitions occurring in the country in the period 2001–2003, in terms of population density in the local parish, land cover type and distance to roads. W...
Plant species richness in the Cape Verde islands - ecogeographical determinants
Duarte, Maria Cristina; Rego, Francisco Castro; Romeiras, Maria Manuel; Moreira, IlídioPlant species richness in the Cape Verde archipelago is examined relative to island eco-geographical factors. Species-area and species-area-habitat relationships are analysed using the classical species-area model and the recently proposed species-choros model. The number of Xoristic zones (used to estimate the choros parameter) provides an adequate estimate of the potential habitat diversity, and the species-c...
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