Hugo Vieira
Sizenando Abreu; Fernando Morgado
Modelling mercury remobilization and transport in Ria de Aveiro: Effects of Climate Change, extreme and dredging events
An important issue today is to understand in what extent cycling of mercury in the future may be altered in regard to Climate Change. Predictions imply that most of the parameters that determine the global mercury cycle today will change. Laranjo bay (Ria de Aveiro) received, during five decades, a large amount of mercury from a highly contaminated chlor-alkali plant effluent discharge from the industrial Estarreja complex. Due to natural remediation processes, in which layers of less contaminated particles overlap with contaminated sediment, most of the mercury released to the lagoon has been trapped in the deeper layers of sediments. Natural and extreme events, Climate Change, or man-made events (dredging activities of the outlet channel will be conducted in the lagoon) can play an important role in the mercury distribution in Ria de Aveiro, since they may promote the remobilization from the deeper layers of sediment to the water column. Under the extreme events and Climate Change scenarios, detailed information on mercury remobilization and transport in Ria de Aveiro is critical to understand the environmental cycling of mercury and relevant for the development of cost-efficient strategies towards reducing the negative impacts of this metal. This study will provide valuable information on the remobilization and transport of mercury from the historically most contaminated area towards adjacent areas of the lagoon, not only through field monitoring but also through modelling, in a Climate Change scenario (four distinct hydrodynamic scenarios), in order to build a prediction procedure contributing to mitigate future disturbances.
Projet OHMs
OHM(s) concerné(s)
  • OHM Estarreja
Chimie, Climatologie, Hydrologie


I, Hugo Coelho Vieira, completed my PhD in Biology and Ecology of Global Change, specialization in Marine Biology and Ecology in 2021 (financially supported by a FCT grant (PD/BD/127808/2016) and a MSc in Marine Biology in 2015 and a degree in Biology in 2013 (including an internship at EPOMEX, Campeche, Mexico) all conferred by the University of Aveiro. Currently, I work as a researcher in the INSIDER project (financed by FCT). Within this project I am Co-supervisor of 2 BSc students and 2 MSc students. My main research interests are: Marine Biology, Ecology and Ecotoxicology, with special focus on the occurrence and distribution of mercury contamination in the marine environment and role of climate change in mercury bioaccumulation along marine food chains. I currently participate in 2 financed research projects (1 as principal investigator and 1 as a team member). I have published 14 ISI papers (10 as first author) and have 16 participations in scientific congresses (plus 3 accepted to be presented in 2021). In 2015, I organized a scientific congress (IV Encontro Nacional de Pós-graduação em Ciências Biológicas - IV ENPGCB). Lately, I have been actively involved in science outreach actions for several publics (hands-on activities in schools and at the laboratory, organization of scientific activities at UA e.g. Xperimenta, Summer Academy). Since 2018, I am an accredited Researcher by the Portuguese Government Veterinary Agency (DGAV - Direção Geral de Alimentação e Veterinária), as a competent researcher for the practice of animal experimentation (FELASA Category B).


João Miguel Dias holds a PhD in Physics and is Associate Professor with Habilitation in the Department of Physics of the University of Aveiro, where he is the current Director. He founded and leads the Estuarine and Coastal Modelling Division (http://www.nmec.eu/), and is a researcher at the Centre for Environment and Marine Studies) (CESAM), where he is co-coordinator of the Integrated Environmental Systems thematic line. With nearly 30 years of professional experience, he is a specialist in the numerical modelling of physical processes in estuarine and coastal zones. He has participated and coordinated several national and international research projects and has extensive experience in consulting for public and private organizations. He is the editor and reviewer of a large number of international journals, and has integrated project and scholarships evaluation panels in the field of marine science for various national and international agencies. He is the author of over 140...