http://hdl.handle.net/10174/14291 2026-04-06T09:31:59Z http://hdl.handle.net/10174/41421 Title: Fracture Network Modelling in a geological complex considered for carbon dioxide (CO2) injection in the offshore area of the Lusitanian Basin. Authors: Barata, Madalena Abstract: The following thesis focuses on developing conceptual models of fracture networks to be used as analogues for a geological complex targeted for carbon dioxide (CO2) storage in the offshore area of the Lusitanian Basin. This work presents a fracture interpretation and characterization, followed by a statistical analysis of the identified fractures, leading to the development of several fracture network scenarios. The main objective is to characterize and model fractures in the sealing formation and assess how these fracture networks could impact the feasibility of CO2 storage. The study's main data source is the 3D seismic volume of Cabo Mondego, which allowed the creation of comprehensive conceptual models, given the data limitations in the target area. Developing conceptual fracture network models provided an extensive characterization of the fractures within the study area by proposing different potential scenarios of their occurrence. The models derived from these scenarios allowed the visualization of possible fracture distributions, considering the main fracture characteristics, and offering a useful analogue for understanding their behavior in the target area. This thesis is aligned with the PilotStrategy project, which aims to improve the understanding of deep saline aquifers for CO2 storage across Europe. Integrating this work with the broader project by considering the fracture scenarios in the dynamic simulations, provides valuable insights into the dynamic behavior of the target area and the CO2 storage potential within the offshore Lusitanian Basin 2024-11-01T00:00:00Z http://hdl.handle.net/10174/40759 Title: Modelagem de nicho de Procambarus clarkii e suas potenciais áreas de invasão em território brasileiro Authors: Oliveira, Lucas Abstract: As invasões biológicas representam um dos maiores desafios mais significativos no Antropoceno, impactando a biodiversidade e o funcionamento dos ecossistemas. A Modelagem de Nicho Ecológico é amplamente utilizada para mapear áreas em risco de invasões, auxiliando na prevenção da expansão de espécies invasoras e orientando esforços de conservação em ecossistemas de água doce. Os principais objetivos deste estudo foram modelar o nicho ecológico de cinco espécies de decápodes de água doce potencialmente invasoras na América do Sul: Dilocarcinus pagei, Macrobrachium amazonicum, Macrobrachium jelskii, Macrobrachium rosenbergii e Procambarus clarkii, e avaliar as áreas adequadas restantes para a ocorrência dessas espécies na América do Sul. Dados de ocorrência do Global Biodiversity Information Facility (GBIF) foram complementados com uma Revisão Sistemática da Literatura. As variáveis utilizadas nos modelos foram obtidas nos bancos de dados Worldclim e EarthEvi. A Modelagem de Nicho Ecológico das áreas potenciais de ocorrência foi realizada utilizando os algoritmos do pacote Biomod2 e SDM. Foi realizado a modelagem de nicho ecológico para as cinco espécies através do algoritmo MaxEnt e do ensemble com os algoritmos de melhor desempenho. Nossos resultados indicaram uma área adequada de até 11% da América do Sul. As avaliações dos modelos apresentaram valores favoráveis de TSS e AUC (>0,7 e >0,8). As áreas adequadas projetadas para a América do Sul incluíram diversas bacias hidrográficas e Áreas Protegidas. As informações geradas em nosso estudo podem ajudar a identificar áreas suscetíveis à invasão de decápodes na América do Sul e apoiar a gestão e as decisões locais. Palavras-chave: Adequabilidade de habitat, Crustáceos, Dilocarcinus, Invasões biológicas, Macrobrachium, Modelagem de Nicho, Procambarus 2023-03-01T00:00:00Z http://hdl.handle.net/10174/39772 Title: Response of estuarine free-living nematodes assemblages to habitat conditions at Sado estuary (SW coast, Portugal) Authors: Pinto, Mário Abstract: Estuarine ecosystems suffer significant pressures with the anthropogenic activities, the major challenge is monitoring these effects in order to preserve the ecosystem functioning. Sado estuary, at Southwest coast of Portugal provides habitat for many species, nevertheless is influenced by several anthropogenic activities and it is unknown how the ecological quality is being affected. How do communities shape themselves in response to different environmental conditions? To fill this gap, the diversity and density patterns of nematode assemblages will be analysed in spatial and temporal scale perspective. Three sites were selected with different ecological conditions and were sampled on two occasions. We hypothesised that significant differences were detected in nematode assemblages’ diversity and density patterns between sites and across sampling occasions. PERMANOVA test reported significant differences only between sites (p<0,05). We concluded that different sediment biogeochemical composition in each site was determinant to shape in diversity and density the nematode assemblages. 2023-11-15T00:00:00Z