Papers by Francisco Castro Rego
Page 21. 2.1 Fire Starts and Human Activities Filipe X. Catry1, Francisco C. Rego1, Joaquim S. Si... more Page 21. 2.1 Fire Starts and Human Activities Filipe X. Catry1, Francisco C. Rego1, Joaquim S. Silva1, Francisco Moreira1, Andrea Camia2, Carlo Ricotta3 and Marco Conedera4 1Centre of Applied Ecology Prof. Baeta Neves ...
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Agriculture, Ecosystems & Environment, 2020
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Scientific Reports, 2020
Climate change is predicted to severely impact interactions between prey, predators and habitats.... more Climate change is predicted to severely impact interactions between prey, predators and habitats. In Southern Europe, within the Mediterranean climate, herbaceous vegetation achieves its maximum growth in middle spring followed by a three-month dry summer, limiting prey availability for insectivorous birds. Lesser kestrels (Falco naumanni) breed in a time-window that matches the nestling-rearing period with the peak abundance of grasshoppers and forecasted climate change may impact reproductive success through changes in prey availability and abundance. We used Normalised Difference Vegetation Index (NDVI) as a surrogate of habitat quality and prey availability to investigate the impacts of forecasted climate change and extreme climatic events on lesser kestrel breeding performance. First, using 14 years of data from 15 colonies in Southwestern Iberia, we linked fledging success and climatic variables with NDVI, and secondly, based on these relationships and according to climatic sc...
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Observatorio de la economía latinoamericana, Apr 25, 2023
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Immunologic Research, May 17, 2023
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Anais do Terceiro Sustentare e Sexto Wipis, 2022
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Springer textbooks in earth sciences, geography and environment, 2021
Many people have called for Integrated Fire Management that effectively harnesses the power of fi... more Many people have called for Integrated Fire Management that effectively harnesses the power of fire to achieve land management goals. Often this includes using fire, and certainly, it involves managing both short- and long-term effects of fire informed by an understanding of both people and place. In eight case studies from around the globe, local experts describe successful variants of integrated fire management. Their stories illustrate innovative, proactive approaches to managing fires and the ecosystems, including people, in which those fires occur. Integrated Fire Management is different in each location, but it is always focused on long-term effectiveness in meeting strategic objectives, and the most effective practitioners are constantly listening, learning, and adapting while working with many different people. In this way, the case studies illustrate that effective fire management is informed by the scientific principles you’ve learned in prior chapters of our book, Fire science from chemistry to landscape management, but also depends on being flexible and adaptive to local and changing conditions. Such management uses fire as one of the tools to increase the benefits of fire while limiting the negative effects of fire in achieving social-ecological ecosystem goals strategically.
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Forest Ecology and Management, Oct 1, 2013
ABSTRACT Pine and oak are common tree species in the Vila Real district, northern Portugal, a reg... more ABSTRACT Pine and oak are common tree species in the Vila Real district, northern Portugal, a region where forests are an important land use (38%). The net primary production (NPP) of these forests is not well known. The objective of this study was to quantify the aboveground biomass and aboveground NPP (ANPP) of pine (Pinus pinaster Aiton), pyrenean oak (Quercus pyrenaica Willd.) and mixed pine–oak forests in the Vila Real district and to evaluate the relationships between ANPP and their stand characteristics. To achieve this objective, 15 stands of pine, 15 stands of oak and 9 stands of mixed pine–oak were studied between 2008 and 2011. ANPP average (and range) of pine, oak and mixed stands were 7.9 (2.9–15.1), 7.3 (3.0–12.1), and 12.1 (6.5–17.2) Mg ha−1 yr−1, respectively. An analysis of covariance (ANCOVA), to reduce the within-groups variability and detect the differences between the stand compositions, was performed. In this analysis, we rejected the null hypothesis that the composition stands had the same mean among ANPP. Mixed stands had a significantly higher mean ANPP than pine or oak. Also, we verified that in pine, the greater distribution of biomass was on the stem (4.0 ± 0.7 Mg ha−1 yr−1, 50% of the total productivity) component where carbon sequestration is retained longer, whereas in oak and mixed stands the foliage was the component with the greater distribution of biomass (4.0 and 6.0 Mg ha−1 yr−1, respectively). Aboveground biomass was significantly different among the three stands types and averaged 83.4, 61.4 and 110.5 Mg ha−1 for pine, oak and mixed stands, respectively. Regression models performed showed that there was a strong relationship between aboveground biomass and basal area in all stands. This study concludes that the production efficiency, defined as stem productivity/leaf area index, was significantly different in mixed stands. Pine had the greatest production efficiency in all stand types and, in mixed stands, had 85% of the total production efficiency.
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Pastagens e Forragens, 1990
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Esta tesis se centra en el analisis y el desarrollo de accionamientos de alto rendimiento para el... more Esta tesis se centra en el analisis y el desarrollo de accionamientos de alto rendimiento para el control de maquinas de corriente alterna y en particular para el motor asincrono con el rotor en jaula de ardilla. El estudio esta dividido en cuatro areas de trabajo desde las que se mejora el comportamiento del accionamiento y que tienen un impacto directo en el incremento del rendimiento global del sistema, entendiendo como tal la red de suministro electrico, la carga acoplada a la maquina de induccion y el diseno electronico del propio accionamiento. Se ha desarrollado un hardware de potencia optimizado que incluye nuevos sistemas de mando de los dispositivos que forman el convertidor, asi como diferentes tecnicas de modulacion que mejoran el rendimiento energetico de la conversion electronica de energia. Se han estudiado distintas metodologia para la estimacion de diferentes parametros dentro del accinamiento. Se han evaluado estrategias de control robusto en modo deslizante para el control de la velocidad del rotor de la maquina. Los esquemas desarrollados logran un comportamiento robusto ante las perturbaciones a las que pueda estar sometido el sistema. Por ultimo se analiza el impacto de los accionamientos para maquinas de corriente alterna en la red de suministro electrico, introduciendose el analisis del rectificador PWM como el convertidor de entrada mas eficiente para este tipo de accionamientos, a los que va a dotar de unas caracteristicas de comportamiento ante la red practicamente ideales.
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Anais do Instituto Superior de Agronomia, 1994
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Springer eBooks, 1992
The present Mediterranean environment is the result of long-standing human activity and fire. Fir... more The present Mediterranean environment is the result of long-standing human activity and fire. Fire must therefore be considered as an internal process of the Mediterranean ecosystems. The inter-relationships between man, fire ana the ecosystem are complex, but their understanding is of extreme importance for the development of adequate policies of fire management.
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Foco, Aug 3, 2023
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HAL (Le Centre pour la Communication Scientifique Directe), 2010
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HAL (Le Centre pour la Communication Scientifique Directe), 2009
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Springer textbooks in earth sciences, geography and environment, 2021
In this chapter of our book, Fire science from chemistry to landscape management, we explain the ... more In this chapter of our book, Fire science from chemistry to landscape management, we explain the factors that influence the energy associated with the pre-ignition phase and the estimation of the adiabatic flame temperature. Before fuels can ignite, they go through a pre-ignition phase that removes water and other liquid volatile compounds from the fuel through dehydration and distillation and that heats the fuel up to the ignition temperature. The required energy is termed heat of pre-ignition as it is the energy required for raising the temperature of the fuel from ambient to the ignition temperature. In this chapter, we discuss estimating the heat of pre-ignition. Then, we estimate the adiabatic flame temperature using the low heat of combustion and the specific heat capacity. The interactive spreadsheet is useful for graphically visualizing how fuel moisture and other fuel characteristics affect the energy required for ignition. In subsequent chapters, we address the implications of heat from fires for the spread and intensity of flaming and smoldering combustion, and for the survival and recovery of plants, people, and ecosystem processes in forests, woodlands, shrublands, and grasslands throughout the world.
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Papers by Francisco Castro Rego