5 results on '"Barreiro, Susana"'
Search Results
2. Opportunities and challenges of Eucalyptus plantations in Europe: the Iberian Peninsula experience.
- Author
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Tomé, Margarida, Almeida, Maria Helena, Barreiro, Susana, Branco, Manuela R., Deus, Ernesto, Pinto, Glória, Silva, Joaquim S., Soares, Paula, and Rodríguez-Soalleiro, Roque
- Subjects
EUCALYPTUS ,EUCALYPTUS globulus ,PLANTATIONS ,PENINSULAS ,FOREST management ,PAPER industry - Abstract
Although native to Australia, Eucalyptus species are found throughout Europe. At present, they are located mainly in the Iberian Peninsula and Eucalyptus globulus is the most commonly planted species. Climate forecasts anticipate an expansion of Eucalyptus to other regions of Europe. The fast growth of E. globulus, together with its resprouting ability and wood properties, has promoted the use of this species in the Iberian Peninsula. The total volume of E. globulus harvested there was close to 14 million m
3 in 2019. Eucalyptus species represent the main source of raw material for the pulp and paper industries and provide an important source of income to non-industrial owners. Being exotic fast-growing trees, their expansion has also been associated with negative environmental impacts. The species therefore poses a series of challenges, while also generating opportunities. The objectives of this review paper are: (1) to summarize the importance of Eucalyptus plantations in Europe; (2) to analyse the opportunities and challenges of this genus in present and future plantations in Europe; (3) to assess to what extent forest management, at both stand and landscape levels, can reduce negative impacts; (4) to make policy and management recommendations that may support the use of this genus in other European regions. These aims are accomplished based on a thorough literature review, particularly focused on research developed in the Iberian Peninsula. [ABSTRACT FROM AUTHOR]- Published
- 2021
- Full Text
- View/download PDF
3. SIMPLOT: Simulating the impacts of fire severity on sustainability of eucalyptus forests in Portugal
- Author
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Barreiro, Susana and Tomé, Margarida
- Subjects
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EUCALYPTUS , *FORESTS & forestry , *LAND use , *WILDFIRES , *FOREST fires , *DEFORESTATION , *CARBON sequestration - Abstract
Abstract: SIMPLOT is a forest simulator for eucalyptus mainly driven by wood demand. It was developed to predict the evolution of the eucalyptus plantations in Portugal by combining forest inventory data with growth models taking into account the effect of different drivers such as wood demand, hazards occurrence and percentage of land use changes. The use of simulators for scenario analysis can be a powerful tool to explore policy options and to illustrate the consequences of different management alternatives. In the past years Portugal has been marked by extremely severe forest fires of great environmental impact. This paper shows simulation runs for two main scenario lines: the wood demand line and the wildfires line. In the first one, the simulator is used to identify a reasonable wood demand out of three different wood demands combined with a low/medium intensity fire scenario. The selected wood demand combined with three fire scenarios of increasing severity and a fourth one disregarding the existence of recent severe wildfires builds the second scenario line. The purpose of this study is to evaluate the impact of different magnitudes of forest fires occurrence on the sustainability of eucalyptus plantations starting with NFI data gathered in 1997 during a horizon of 28 years. The simulations reflect a constant level of afforestation and deforestation and assume that no changes took place between different management alternatives. These simulations provide some insight on the impact of different wood demand and different magnitudes/frequency of severe wildfires: it is not only the number and magnitude of severe wildfires that make a difference, but it is also the number and magnitude of medium wildfires that follow an extremely severe one. Furthermore, the inter-annual variability of wildfire occurrence affects carbon stock and carbon sequestration in a different way. The occurrence of severe wildfires has an immediate effect on carbon sequestration. The lower values are registered in the same year in which the most severe wildfires occur. On the other hand, the occurrence of severe wildfires has more permanent consequences on carbon stocks than on carbon sequestration. The more severe and numerous are the wildfires the more difficult and at long-term will be to recover the carbon stocks in the forest. Results have also shown that if a higher wood demand compatible with the expected increase of pulp industry capacity would have been considered this would have had drastic impacts on eucalyptus forest sustainability due to overharvesting in order to meet the desired wood demand. [Copyright &y& Elsevier]
- Published
- 2011
- Full Text
- View/download PDF
4. Estimating defoliation impact of Gonipterus platensis on Eucalyptus globulus stands productivity using a forest simulator based on 3-PG.
- Author
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Rua, João C.P., Barreiro, Susana, Branco, Manuela, and Tomé, Margarida
- Subjects
FOREST productivity ,DEFOLIATION ,EUCALYPTUS ,EUCALYPTUS globulus ,SPIRULINA ,INTEGRATED pest control ,FOREST management - Abstract
• Modeling the impact of defoliation on tree growth is an important tool for Integrated Pest Management (IPM). • A 3-PG based simulator was developed to integrate a Gonipterus platensis species-specific defoliation module. • Different scenarios of defoliation intensity under varying site conditions were simulated. • Wood volume losses of 74% and 85% were predicted for defoliations of the upper third of canopy of 75% and 100%, respectively. Growth losses due to insect defoliations are difficult to estimate. The lack of appropriate tools that account for defoliations in growth simulations makes difficult the task of forest managers to project growth, and thus, the expected economic income. The present work integrates defoliations in the 3-PG forest growth model in order to provide a tool that allows forest managers to estimate Eucalyptus globulus stands growth losses under a set of defoliation scenarios by simulating attacks of the Eucalyptus snout beetle Gonipterus platensis. To mimic these attacks, different amounts of the upper third of the canopy were removed, from 0 to 100%, depending on the scenario intensity, and considering only spring season attacks or both spring and autumn attacks in the same year. A set of E. globulus virtual stands, representing a range of site productivities, were submitted to constant yearly consecutive defoliations since age 2 up to 10. Simulation results showed that, for scenarios that removed 50, 75 and 100% of the upper third of the canopy, volume losses averaged 54, 74 and 83%, respectively, at age 10 with just the spring attack, reaching 69, 82 and 88%, respectively, with also the autumn attack. Removing only 25% of the upper third of the canopy produced relevant losses only if the stands were attacked in both seasons. Lighter defoliations tested seemed to have a marginal effect on stand growth regardless of site quality. The tool was also used to evaluate a field assessment methodology of G. platensis defoliation attacks on a set of real stands by comparing observed and estimated volumes at age 10. Estimations showed increasing volume losses with increasing defoliation intensities. When evaluating the field assessment methodology, results suggest that a single field visit to assess the G. platensis attack level in the whole lifetime of a stand is insufficient to make reliable growth loss estimations. The integration of the impact of defoliations in the 3-PG growth model revealed to be potentially useful as a forest management decision tool. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
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5. Plano de gestão florestal para povoamentos de eucalipto clonais no sul do país
- Author
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Barbosa, Célia Patrícia Brito Castro, Tomé, Margarida, and Barreiro, Susana Miguel
- Subjects
eucalyptus ,FMP ,growth models ,FSC(R) ,biodiversity - Abstract
Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia This report addresses the record of the author’s experience and professional activity, developing a set of topics with scientific relevance and technical depth corresponding to the requirements of the master's degree, and in so doing giving evidences of the author’s skills in areas such as eucalyptus management, biodiversity management, growth models, among others. The report stems from the Forest Management Plan (FMP) for EGLON – TIMBERS company, which manages an area of 2,598 hectares entirely located in the south of Portugal (Beja and Faro districts), 83% of which is occupied by eucalyptus, the vast majority of clonal origin in the first rotation for wood pulp production. In addition to the information required by FMP technical standards, this report includes a quantitative approach for decision support by using growth models (SOP and GLOBULUS 3.0) to predict future production as well as a biodiversity program aligned with the FSC® standards for forest management in Portugal, with special focus on specific environmental impact requirements and High Value Conservation Forests principles
- Published
- 2014
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