89 documents found, page 1 of 9
Pedoclimatic and Landscape Conditions of Olive Groves in Portugal and Alentejo.
Muñoz-Rojas, Jose; Guiomar, Nuno; Pinto-Correia, Teresa; Prats, SérgioOlive groves in Alentejo have exponentially increased their extent over the past 30 years through irrigation and technological intensification, including also the use of exogenous breeds and cultivars. This has been facilitated by the implementation of the Alqueva irrigation network. This rapid process of change has permitted overcoming many of the bio-physical limitations of the regional soils and climate. Ult...
Fire enhances changes in phosphorus (P) dynamics determining potential post-fir...
Souza-Alonso, Pablo; Prats, Sergio; Merino, Agustin; Guiomar, Nuno; Guijarro, Mercedes; Madrigal, JavierSoil phosphorus (P), which is essential for ecosystem functioning, undergoes notable changes after fire. However, the extent to which fire characteristics affect P dynamics remains largely unknown. This study investigated the impact of type of fire (prescribed burning and natural wildfires) of different levels of severity on P dynamics in Mediterranean soils. Soil P concentrations in the organic layers were str...
Assessing the vulnerability of mountain value chains to environmental and socia...
González-Moreno, Pablo; Schmitt, Emilia; Moreno-Ortiz, Javier; Pinto-Correia, Teresa; Guiomar, Nuno; Delgado-Serrano, María del MarMountain ranges are complex socio-ecological systems recognised as the “undervalued ecological backbone” of Europe as they provided essential ecosystem services and goods. However, we lack a deep understanding on their vulnerability to both environmental and social drivers. We carried out a stakeholder-based study assessing the vulnerability of 23 land-use systems supporting a wide range of value chains in Euro...
Marcadores moleculares subrogados a la repelencia al agua en suelos afectados p...
Jiménez-Morillo, Nicasio T.; Almendros, Gonzalo; Guiomar, Nuno; Miller, Ana Z.; Barrocas-Dias, Cristina; de la Rosa, José M.; Hatcher, Patrick G.La repelencia al agua del suelo (RAS) se atribuye a la acumulación de compuestos hidrofóbicos (lípidos), pero su extracción no siempre elimina la RAS, lo que sugiere que componentes macromoleculares no extraíbles también pueden estar relacionados con una RAS. Se han estudiado suelos quemados (B) y control (UB) del Parque Nacional de Doñana (Huelva, España) bajo dos tipos de vegetación (alcornoque y brezo) y fra...
Hyperspectral refrectace as a basis to discriminate olive varieties - a tool fo...
Gomes, Luís; Nobre, Tânia; Sousa, Adélia; Rei, Fernando; Guiomar, NunoWorldwide sustainable development is threatened by current agricultural land change trends, particularly by the increasing rural farmland abandonment and agricultural intensification phenomena. In Mediterranean countries, these processes are a ecting especially traditional olive groves with enormous socio-economic costs to rural areas, endangering environmental sustainability and biodiversity. Traditional olive...
Study of mega fires in Portugal: surface, atmosphere and society perspectives
Salgado, Rui; Couto, Flavio; Andrade, Nuno; Campos, Cátia; Santos, Filippe; Purificação, Carolina; Filippi, Jean-Baptiste; Baggio, Roberta; Dias, SusanaA mega fire is a transversal problem to several fields, with impacts from the Earth’s atmosphere to human health and safety, quality of life and economic growth in affected areas. The study summarizes some recent studies developed at University of Évora, Portugal, covering the following areas: surface, atmosphere, and society. At surface, the study has been essential to understand the vegetation dynamic and fir...
The Portuguese Large Wildfire Spread database (PT-FireSprd)
Benali, Akli; Guiomar, Nuno; Gonçalves, Hugo; Mota, Bernardo; Silva, Fábio; Fernandes, Paulo M.; Mota, Carlos; Penha, Alexandre; Santos, JoãoWildfire behaviour depends on complex interactions between fuels, topography, and weather over a wide range of scales, being important for fire research and management applications. To allow for significant progress towards better fire management, the operational and research communities require detailed open data on observed wildfire behaviour. Here, we present the Portuguese Large Wildfire Spread database (PT...
The ambiguous role of agri-environment-climate measures in the safeguarding of ...
Azeda, Carla; Guiomar, Nuno; Godinho, Sérgio; Medeiros, João Paulo; Pinto-Correia, TeresaThe preservation of High Nature Value farmland (HNVf) is essential for meeting many of the new European Union (EU) Green Deal targets, as they correspond to production systems which respect the preservation of natural resources and support multiple ecosystem services. However, most of the farming systems on which HNVf rely cannot survive without support from public policies. Typically, these are low intensity a...
Assessing food availability: A novel approach for the quantitative estimation o...
Guiomar, Nuno; Godinho, Sérgio; Rivera, Maria; Pinto-Correia, Teresa; Machado, Rui; Czekaj, Marta; Tyran, Ewa; Puchała, JacekRecent findings on the contribution of smallholders to global food production and security challenge the values used in several reports of international organizations. The skewed distribution of the number of farms and the agricultural area by farm size may explain overestimations in small farms' food production. In fact, the highest values found in literature seem to be more strongly correlated to the total nu...
Does road accessibility to cities support rural population growth? Evidence for...
Melo, Patrícia; Rego, Conceição; Anciães, Paulo; Guiomar, Nuno; Muñoz-Rojas, JoséMotorways in Portugal received large scale funding after the country joined the European Union in 1986, making it an ideal case to study the effect of road accessibility on the development of lagging rural areas. We investigate the relationship between rural population change and road accessibility to the urban hierarchy between 1991 and 2011. We find that rural population growth is negatively associated with i...