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- An individual tree growth model for juvenile cork oak stands in southern PortugalPublication . Tomé, Margarida; Paulo, Joana AmaralThe juvenile and adult stages in cork oak are distinct because of the periodic debarking of the stem and branches that characterizes the adult stage. This fact implies the use of diameter under bark for the adult stage while diameter over bark is the natural variable for juvenile stands in growth and yield studies. Tree growth in the adult stage may also be affected by the periodic debarking. The differences between the two stages justify the development of different models for each of them. The objective of this paper is to develop an individual tree growth and yield model for juvenile cork oak stands for general application on the cork oak distribution area in Southern Portugal. The most important modules of this growth model were developed using data collected from a large number of trees in the juvenile stage, from several plots distributed around the South of Portugal. These modules were: an individual tree diameter growth model, a height-diameter model and a model for crown diameter prediction.
- Prediction of secondary cork industrial quality and porosity based on virgin cork caracteristicsPublication . Paulo, Joana Amaral; Santos, Diana Isa
- Lessons learnt: montados in PortugalPublication . Faias, Sónia Pacheco; Firmino, Paulo; Tomé, Margarida; Palma, J.H.N.; Paulo, Joana AmaralThe AGFORWARD research project (January 2014 - December 2017), funded by the European Commission, is promoting agroforestry practices in Europe that will advance sustainable rural development. The project has four objectives: 1. to understand the context and extent of agroforestry in Europe, 2. to identify, develop and field-test innovations (through participatory research) to improve the benefits and viability of agroforestry systems in Europe, 3. to evaluate innovative agroforestry designs and practices at a field-, farm- and landscape scale, 4. to promote the wider adoption of appropriate agroforestry systems in Europe through policy development and dissemination. This report contributes to the second objective and Deliverable 2.5 which describes the lessons learnt from innovations within agroforestry systems of high natural and cultural value. Within the project, there were ten stakeholder groups focused on such systems (e.g. dehesas, montados, other wood pastures, and bocage). This report focuses on a trial established to understand the effect of understory management alternatives on the tree and cork growth, in pure cork oak woodlands, also commonly known in Portugal as ”Montado”
- Portuguese regional agroforestry innovation network (RAIN) from the AFINET project: SWOT analysis after two years of establishementPublication . Paulo, Joana Amaral; Almeida, R.; Palma, J.H.N.; Tomás, A.; Tomé, Margarida
- Research and Development Protocol for Cork Oak Woodland in PortugalPublication . Paulo, Joana Amaral; Faias, Sónia Pacheco; Tomé, Margarida; Palma, J.H.N.
- Carbon storage in the soil under different land uses in the south of PortugalPublication . Ferreiro-Dominguez, N.; Palma, J.H.N.; Paulo, Joana Amaral; Rigueiro-Rodriguez, A.; Mosquera-Losada, M.R.
- Montado in Portugal. High natural and cultural value agroforestryPublication . Crous-Duran, Josep; Paulo, Joana Amaral; Palma, J.H.N.
- Google Earth Engine based monitoring of cork and holm oak woodlands NDVI trends in PortugalPublication . Aubard, V.; Paulo, Joana Amaral; Silva, João M.N.The Mediterranean area currently suffers a general decline of oak woodlands’ health and productivity. Cork oak (Quercus suber L.) and holm oak (Quercus ilex L.) are widely exploited in Portugal and are an important economical and ecological resource for the country. The Normalized Difference Vegetation Index (NDVI) is a common remote sensing index used as a proxy for vegetation biomass, chlorophyll activity, health and stress. NDVI can be monitored for 34 years (1984-2017) at 30-meter of resolution using Landsat imagery. The online platform Google Earth Engine (GEE) allows the free access and fast handling of this huge amount of satellite images. Objective: Providing to researchers, land owners and policy-makers a high-resolution map of cork and holm oak long-term trends for the whole Portugal
- Carbon balance estimation for agroforestry land use alternatives in PortugalPublication . Crous-Duran, J.; Paulo, Joana Amaral; Palma, J.H.N.In 2005, 11% of the anthropogenic greenhouse gases emissions (GHG) were originated from agricultural activities and this value is expected to increase in the future (IPCC 2007). Besides the contribution for the restoration of soil productivity and for the improvement of conditions in degraded land, Agroforestry is also proposed as one of the main solutions for the mitigation of the GHG emissions and their effect on Climate Change (IPCC 2007). With European Union’s legislation supporting and promoting the conversion of land into low-carbon-integrated agriculture, new opportunities arise for the implementation of this type of land use in Europe. In Portugal, this type of agriculture is well represented by a traditional Agroforestry system called montado, combining low density cork oak trees (Quercus suber L) with pastoral activities occupying an area of 715,922 ha (AFN, 2010), with recent studies showing an extra area suitable for its implementation of around 353,000ha (Palma et al 2014). Considering the new policies established by the EU in regard to the measures to be considered in agriculture for the Climate Change mitigation, and the capacity of the Agroforestry systems to act as a low-carbon and highly productive agriculture, two main objectives are proposed for this work: 1) Compare the potential capacity of the montado to mitigate the GHG emissions by quantifying the net carbon balance of activities in comparison to two other land-use alternatives occurring in the same area: dense cork oak forestry and wheat monoculture; 2) Quantify the benefits/consequences in terms of net carbon balance if new areas are converted into Agroforestry systems, as an alternative to current activities and management models. The methodology for the net carbon balance estimation includes the use of the Yield-SAFE model (Van der Werf et. al, 2007), calibrated for crop components (Graves et al., 2010) and cork oak (Palma et al., 2014) and current most used management practices concerning the three land use types and associated activities.
- Using the yield-safe model to assess hypothetical eucalyptus silvopastoral systems in PortugalPublication . Palma, J.H.N.; Oliveira, T.S.; Crous-Duran, J.; Paulo, Joana Amaral