A5006397240- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Polar Research and Ecology
- Microbial Community Ecology and Physiology
- Marine and coastal plant biology
- Oceanographic and Atmospheric Processes
- Marine and fisheries research
- Isotope Analysis in Ecology
- Marine animal studies overview
- Ocean Acidification Effects and Responses
- Diatoms and Algae Research
- Coral and Marine Ecosystems Studies
- Marine Bivalve and Aquaculture Studies
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Thermochemical Biomass Conversion Processes
- Water Quality Monitoring and Analysis
- Landslides and related hazards
- Climate variability and models
- Fire dynamics and safety research
- Adhesion, Friction, and Surface Interactions
- Botany and Plant Ecology Studies
- Ruminant Nutrition and Digestive Physiology
- Combustion and Detonation Processes
- Water Quality and Pollution Assessment
University of Lisbon
2017-2024
Universidade Federal do Rio Grande
2020-2023
Instituto Hidrográfico
2021
Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento
2017
The western Antarctic Peninsula (WAP) is a climatically sensitive region where foundational changes at the basis of food web have been recorded; cryptophytes are gradually outgrowing diatoms together with decreased size spectrum phytoplankton community. Based on 11-year (2008-2018) in-situ dataset, we demonstrate strong coupling between biomass accumulation cryptophytes, summer upper ocean stability, and mixed layer depth. Our results shed light environmental conditions favoring cryptophyte...
The Northern Antarctic Peninsula (NAP), located in West Antarctica, is amongst the most impacted regions worldwide by recent warming events. Its vulnerability to climate change has already led an accumulation of severe changes along its ecosystems. This work reviews current findings on impacts observed phytoplankton communities occurring NAP, with a focus causes, consequences, and potential research priorities for integrated comprehension physical-biological coupling perspective. Evident...
Abstract. A global in situ data set for validation of ocean colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI) is presented. This version compilation, starting 1997, now extends to 2021, which important most recent satellite optical sensors such as Sentinel 3B OLCI and NOAA-20 VIIRS. The comprises observations following variables: spectral remote-sensing reflectance, concentration chlorophyll-a, inherent properties, diffuse attenuation coefficient, total suspended...
Chlorophyll-a (Chl-a) underestimation by global satellite algorithms in the Southern Ocean has long been reported, reducing their accuracy, and limiting potential for evaluating phytoplankton biomass. As a result, several regional Chl-a have proposed. The present work aims at assessing performance of both that are currently available Western Antarctic Peninsula (WAP) investigate which factors contributing to Chl-a. Our study indicates algorithm, on average, underestimates in-situ ~59%,...
Abstract The Antarctic Peninsula (West Antarctica) marine ecosystem has undergone substantial changes due to climate-induced shifts in atmospheric and oceanic temperatures since the 1950s. Using 25 years of satellite data (1998-2022), this study presents evidence that phytoplankton biomass bloom phenology West are significantly changing as a response anthropogenic climate change. Enhanced was observed along Peninsula, particularly early austral autumn, resulting longer blooms. Long-term sea...
Abstract Diatoms play crucial functions in trophic structure and biogeochemical cycles. Due to poleward warming, there has been a substantial decrease diatom biomass, especially Antarctic regions that experience strong physical changes. Here we analyze the phytoplankton contents of water samples collected spring/summer 2015/2016 off North Peninsula during extreme El Niño event compare them with corresponding satellite chlorophyll- data. The results suggest close link between large blooms,...
Phytoplankton bloom phenology studies are fundamental for the understanding of marine ecosystems. Mismatches between fish spawning and plankton peak biomass will become more frequent with climate change, highlighting need thorough in coastal areas. This study was first to assess phytoplankton Western Iberian Coast (WIC), a complex region SW Europe, using multisensor long-term ocean color remote sensing dataset daily resolution. Using surface chlorophyll (chl-a) biogeophysical datasets, five...
Phytoplankton are the main primary producers in marine ecosystems, supporting important food webs. They recognized as indicators of environmental changes oceans and coastal waters. Ocean colour remote sensing has been extensively used to study phytoplankton throughout world, yet there is still much understand terms what influences variability at regional scales. The aim this was investigate drivers Western Iberian Coast (WIC), for period 1998-2016. Satellite chlorophyll a (CHL) data acquired...
Phytoplankton biomass, through its proxy, Chlorophyll a , has been assessed at synoptic temporal and spatial scales with satellite remote sensing (RS) for over two decades. Also, RS algorithms to monitor relative size classes abundance are widely used; however, differentiating functional types from RS, as well the assessment of phytoplankton structure, in terms carbon remains challenge. Hence, main motivation this work it discuss links between groups, order foster capability assessing...
Changes in coccolithophore productivity response to climate-driven ocean warming are likely have cascading biogeochemical effects that feed back the changing climate. This paper investigates role (and interplay) of large-scale oceanographic and atmospheric processes across North- Equatorial Atlantic, including Saharan dust deposition, on distribution communities. The study is based biological hydrological data collected photic zone ocean, aerosol from lower atmosphere, 50°N–1°S during...
The European sardine (Sardina pilchardus) is the most abundant and socio-economically important small pelagic fish species in Western Iberia Upwelling Ecosystem. As a result of long series low recruitments, biomass off has greatly reduced since 2000s. Recruitment mainly dependent on environmental factors. In order to identify key drivers recruitment, it essential understand its temporal spatial variability. To achieve this goal, comprehensive suite atmospheric, oceanographic, biological...
Abstract The Western Iberian Coast (WIC) is characterized by a dynamic coastal upwelling system with interactions between oceanographic features and continental river run‐off. present study investigates the spatio‐temporal variability in concentrations of Chlorophyll (Chl ) turbidity, their relationships physical other biogeochemical properties along entire coast Portugal, as well response phytoplankton to pulses. In situ data were obtained during four campaigns conducted spring (April–May...
While primary productivity is more stable in oceanic regions, it may vary to a great extent with the proximity coasts, where mesoscale processes intertwine and shape phytoplankton community composition biomass. Sometimes, this lead development of anomalous blooms (i.e., episodic that exceed several times average biomass). A massive bloom observed off Western Iberian Coast (SW Europe) during March 2009 prompted full investigation on its spatial temporal extent, causes, potential impact...
Salinity is one of the oldest parameters being measured in oceanography and most important to study context climate change. However, its quantification by satellite remote sensing has been a relatively recent achievement. Currently, after over ten years data gathering, there are still many challenges quantifying salinity from space, especially when it intended for coastal environments study. That mainly due spatial resolution available products. Recently, new higher (5 km) L4 SMOS sea...
The Atlantic Meridional Transect (AMT) program ( www.amt-uk.org ) provides the perfect opportunity to observe phytoplankton community size structure over a long latitudinal transect 50 o N S, thereby covering most important latitude-related basin-scale environmental gradients of Ocean. This work presents cell abundance data taxa recently collected during cruises AMT28 and 29 (in 2018 2019, respectively) using flow cytometer microscope observations, as well pigment composition community,...
The Atlantic sector of the Southern Ocean has been rapidly changing over last century. Many those changes are driven by climate anomalies such as El Niño-Southern Oscillation and Annular Mode, which affect biological processes that scale up food web. We used δ 13 C 15 N time series dentine growth layer groups (as a proxy individual foraging history from multiple years, n = 41 teeth) to assess temporal shifts in habits subadult/adult male Antarctic fur seals Arctocephalus gazella (AFSs) 2...
Estuaries are among the most sensitive systems to climate change. Previous studies have suggested that Sado Estuary (Portugal) has decreasing trends for water temperature, which is uncommon in a global warming scenario. However, no long-term analysis regarding column conditions been conducted on this estuary date. Therefore, main aim of study understand if and how properties changed, considering 34-year trend an assessment their drivers. Water temperature significantly decreased (up 0.04...
A mortalidade infantil é um indicador essencial da saúde pública, refletindo as condições de vida, o acesso aos serviços e a eficácia das políticas assistência materno-infantil. Objetivo: analisar os fatores associados à em uma capital Região Norte do Brasil. Método: Trata-se estudo transversal, retrospectivo, exploratório, abordagem quantitativa, com coleta dados secundários, extraídos no site Departamento Informática SUS – DATASUS, tabulados partir TABNET. Resultados: No período estudado,...