39 documents found, page 1 of 4
A Land Cover Change Detection Approach to Assess the Effectiveness of Conservat...
Tiengo, Rafaela; Merino De Miguel, Silvia; Uchôa, Jéssica; Gil, Artur José FreireSmall oceanic islands, such as São Miguel Island in the Azores (Portugal), face heightened susceptibility to the adverse impacts of climate change, biological invasions, and land cover changes, posing threats to biodiversity and ecosystem functions and services. Over the years, persistent conservation endeavors, notably those supported by the EU LIFE Programme since 2003, have played a pivotal role in alleviati...
A conceptual framework to help choose appropriate blue nature-based solutions
Pérez, Géraldine; O'Leary, Bethan C; Allegri, Elena; Casal, Gema; Cornet, Cindy C.; de Juan, Silvia; Failler, Pierre; Fredriksen, SteinBiodiversity loss and climate change have severely impacted ecosystems and livelihoods worldwide, compromising access to food and water, increasing disaster risk, and affecting human health globally. Nature-based Solutions (NbS) have gained interest in addressing these global societal challenges. Although much effort has been directed to NbS in urban and terrestrial environments, the implementation of NbS in ma...
Detection of Geothermal Anomalies in Hydrothermal Systems Using ASTER Data: The...
Uchôa, Jéssica; Viveiros, Fátima; Tiengo, Rafaela; Gil, Artur José FreireABSTRACT: Current-day volcanic activity in the Azores archipelago is characterized by seismic events and secondary manifestations of volcanism. Remote sensing techniques have been widely employed to monitor deformation in volcanic systems, map lava flows, or detect high-temperature gas emissions. However, using satellite imagery, it is still challenging to identify low-magnitude thermal changes in a volcanic sy...
25 anos de Copernicus.
Gomes, Claudio; Gil, Artur José FreireO programa europeu de observação da Terra, Copernicus, anteriormente chamado “Monitorização Global para o Ambiente e Segurança”, ou GMES na sigla inglesa, é constituído por uma constelação atual de oito satélites (o primeiro tendo sido lançado em 2014 e podendo chegar a um total de quase 20 até 2030) e por um conjunto de sistemas de observação in situ com sensores terrestres, aéreos e marinhos, permitindo o ace...
How Many Azores Bullfinches (Pyrrhula murina) Are There in the World? Case Stud...
Costa, Tarso; Gil, Artur José Freire; Timóteo, Sérgio; Ceia, Ricardo S.; Coelho, Ruben; De La Cruz Martín, AzucenaThe Azores bullfinch (Pyrrhula murina Godman, 1866) is a rare Passeriformes endemic from the eastern part of São Miguel Island, Azores, Portugal. This bird was almost considered extinct in the first half of the 20th century, but due to recent conservation measures, it has experienced a recovery since the beginning of the 2000s. Despite the attention given to this bird, the size of its population is still contro...
Resource Communication : ForestAz - Using Google Earth Engine and Sentinel data...
Fernández-Urrutia, Manuel; Gil, Artur José FreireAIM OF STUDY: ForestAz application was developed to (i) map Azorean forest areas accurately through semiautomatic supervised classification; (ii) assess vegetation condition (e.g., greenness and moisture) by computing and comparing several spectral indices; and (iii) quantitatively evaluate the stocks and dynamics of aboveground carbon (AGC) sequestrated by Azorean forest areas. AREA OF STUDY: ForestAz focuses ...
Using NDVI, climate data and machine learning to estimate yield in the Douro wi...
Barriguinha, André; Jardim, Bruno; Neto, Miguel de Castro; Gil, Artur José FreireEstimating vineyard yield in advance is essential for planning and regulatory purposes at the regional level, with growing importance in a long-term scenario of perceived climate change. With few tools available, the current study aimed to develop a yield estimation model based on remote sensing and climate data with a machine-learning approach. Using a satellite-based time-series of Normalized Difference Veget...
Supporting the spatial management of invasive alien plants through assessment o...
Machado, Rui; Duarte, Liliana Neto; Gil, Artur José Freire; Sousa‐Neves, Nuno; Pirnat, Janez; Santos, PedroInvasive alien species are responsible for several negative impacts worldwide. Managing biological invasions is often difficult and the success rate is quite low, but with good planning it is possible to achieve good results. Besides employing the correct methods and techniques, an overall strategy based on landscape dynamics and expected spatial patterns can be fundamental to achieve success. The decision of w...
Embracing Nature-based Solutions to promote resilient marine and coastal ecosys...
O'Leary, Bethan C.; Fonseca, Catarina; Cornet, Cindy C.; de Vries, Mindert B.; Degia, A. Karima; Failler, Pierre; Furlan, Elisa; Garrabou, JoaquimThe world is struggling to limit greenhouse gas emissions and reduce the human footprint on nature. We therefore urgently need to think about how to achieve more with actions to address mounting challenges for human health and wellbeing from biodiversity loss, climate change effects, and unsustainable economic and social development. Nature-based Solutions (NBS) have emerged as a systemic approach and an import...
The spectralrao-monitoring Python package : A RAO's Q diversity index-based app...
Tassi, Andrea; Massetti, Andrea; Gil, Artur José FreireMonitoring multifunctional agricultural areas is paramount to ensure their cost-effective management. The remote sensing-based detection of land-cover/land-use (LCLU) changes and analysis of vegetation dynamics constitute a relevant indicator to support robust monitoring schemes, allowing the control of agri-environmental conditions and enforcing related measures and policies. The Rao's Q diversity index (RaoQ)...