Vasco Vieira worked in University of Algarve (mainly in CCMar) from 1999 to 2011 and in Maretec thereafter. He completed his PhD in December 2011 with the highest classification. He specialized in analysing and modelling marine biological and ecological systems. His main focus is marine macrophytes, namely seaweeds and seagrasses. But he also improved the application of numerical methods to ecology and geosciences. He participates in many international collaborations. Besides being always responsible for the data analysis and modelling, he is often heading the work as well as coordinating and participating in the field surveys. He has 38 articles in international scientific publications, 475 citations and an h index 12 (Google Scholar). Vasco Vieira researches on the ecology and evolution of seaweed in collaboration with researchers from CCMar and IST (Portugal), CNRS (France), PUC (Chile), UERJ (Brazil), StFX (Canada) and CSMCRI (India). He started in 1999 in integrated aquaculture of seaweed and abalone using fish farm effluents. In project “Gelidium” he studied the ecology and evolution of the red alga Gelidium sesquipedale. In the international project “Ecokelp” he studied the ecology and evolution of Kelp. In the international project “Deciphering the complex evolutionary history of a domesticated red alga within the Pacific Ocean using population genomic” he studied the ecology and evolution of the red alga Agarophyton chilensis (former Gracilaria gracilis). In the last two years he developed collaborations with CERENA (through José Sardinha and his group) and CSMCRI (through Vaibhav Mantri and his group) to apply his knowledge on seaweed ecology and ecophysiology to optimize the production of the algae cultivated by either group. Vasco Vieira researches on the biomass-density relations of seaweeds and of seagrasses, how they depend on the environment, and how they can be used as ecological indicators. He started this research line in CCMar participating in project "Whole-system metabolism and CO2 fluxes in a coastal lagoon dominated by saltmarsh and seagrass meadows". He later extended his collaborations to IPMA and FCUL (Portugal), UERJ, Swansea University - SU (UK) and CIMAR (Costa Rica).