8 documents found, page 1 of 1
A portable and low-cost optical device for pigment-based taxonomic classificati...
Magalhães, Vitor; Pinto, Vânia Cristina Gonçalves; Sousa, Paulo Jorge Teixeira; Afonso, José A.; Gonçalves, L. M.; Fernández, Emilio; Minas, GraçaThe proliferation of certain phytoplankton species may lead to harmful algal blooms (HABs) that can affect living resources and human health. Therefore, an accurate identification of phytoplankton populations is essential for the sustainable management of some activities relevant for the blue economy, such as aquaculture, being also relevant for environmental monitoring and marine research purposes. Microalgae ...
Contourite depositional systems offshore Madeira Island: Decoding the deepwater...
Roque, Cristina; Hernández-Molina, Javier; Brito, Pedro; Madureira, Pedro; Quartau, Rui; Magalhães, Vitor; Carrara, GabrielaThere is still a great unawareness about the deep-water circulation in the NE-Central Atlantic since the Late Cretaceous. The morphology, sedimentary stacking pattern and distribution of contourite depositional systems have been widely used as paleoceanographic indicators, given clues about the relative velocity and pathways of bottom currents past-circulation. We present here evidence of a new contourite featu...
Spiral inertial microfluidics for separation and concentration of phytoplankton
Magalhães, Vitor; Pinto, Vânia Cristina Gonçalves; Sousa, Paulo; Gonçalves, Luís; Fernández, Emilio; Minas, GraçaHarmful algal blooms (HABs) are a recurring phenomenon along all continents, posing a global threat, particularly due to shellfish poisoning and public health, and their timely monitoring is vital for safeguarding the blue economy. The ability to efficiently isolate species of interest, such as harmful dinoflagellates, is a key process for HABs monitoring which is particularly complex because of the typically h...
Interplay of deep-marine sedimentary processes with seafloor morphology offshor...
Roque, Cristina; Hernándes-Molina, Javier; Madureira, Pedro; Quartau, Rui; Magalhães, Vitor; Brito, Pedro; Vásquez, Tomás; Somoza, LuísThe deep-water sedimentary processes and morphological features offshore Madeira Island, located in the Central-NE Atlantic have been scantly studied. The analysis of new multibeam bathymetry, echo-sounder profiles and few multichannel seismic reflection profiles allowed us to identify the main geomorphologies, geomorphic processes and their interplay. Several types of features were identified below 3800 m wate...
Multiproxy characterization of high energy layers in the nner continental shelf...
Santos, Jacqueline; Drago, Teresa; Moura, Delminda; Magalhães, Vitor; Roque, Cristina; Silva, Pedro F.; Rodrigues, Ana Isabel; Terrinha, PedroThe occurrence of sedimentary layers indicating high energy events is common in the continental shelves sedimentary record. Their presence has been usually related either to tsunami waves or storm waves. In both cases, the identification of the transport mechanism requires a variety of proxies. This work presents the preliminary results of the analysis of a gravity core (MW-107) collected at ca. 57 m water dept...
Offshore 1755 CE Lisbon Tsunami deposit in the southern portuguese continental ...
Kümmerer, Vincent; Drago, Teresa; Veiga-Pires, Cristina; Silva, Pedro; Lopes, Ana; Magalhães, Vitor; Roque, Cristina; Rodrigues, Ana IsabelThe importance of tsunami hazard assessment is only possible if a complete dataset of events is available, allowing the determination of the recurrence intervals of the tsunamis adapted to local and regional conditions. One possible way to know these intervals is to study the offshore sedimentary record, looking for sediment remobilised and transported by the incoming tsunami waves and generated backwash curren...
Exploring offshore sediment evidence of the 1755 CE Tsunami (Faro, Portugal): i...
Kümmerer, Vincent; Drago, Teresa; C. Veiga-Pires, C.; Silva, Pedro F.; Magalhães, Vitor; Mena, Anxo; Lopes, Ana; Rodrigues, Ana Isabel; Schmidt, SabineOuter shelf sedimentary records are promising for determining the recurrence intervals of tsunamis. However, compared to onshore deposits, offshore deposits are more difficult to access, and so far, studies of outer shelf tsunami deposits are scarce. Here, an example of studying these deposits is presented to infer implications for tsunami-related signatures in similar environments and potentially contribute to...
Cataloguing Quaternary paleo-coastlines in West and Southwest Portugal. Economi...
Ribeiro, Carlos; Terrinha, Pedro; Brito, Pedro; Noiva, João; Rosa, Marcos; Batista, Luis; Neres, Marta; Magalhães, VitorA catalogue of paleo-coast lines in Southwest and South Portugal is presented based on direct field observation and on recent multibeam and backscatter bathymetric surveys. Above sea level, coastline classification was based on field observation of i) wave cut platforms directly associated with ii) notches and/or marine sand deposits with shell clasts, iii) speleothems interbedded with sand deposits and iv) bea...