Percorrer por autor "Nathan, Justine"
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- Aquaculture in the crossroad of microplastic contaminationPublication . Bebianno, Maria; Manthopoulos, Michael; Nathan, Justine; Cristina, Sónia; Ribeiro, Laura; Luna-Araújo, Ravi; Icely, John; Dias Duarte Fragoso, Bruno; Moura, DelmindaPlastic pollution threatens life and human health, with microplastics (MP) linked to seafood consumption. MPs enter aquaculture through the environment and from aquaculture gear. During aquaculture production, plastic is used in nets and sacks for the growth process and in collecting and processing so it becomes important to expand the knowledge about how much MPs are present in seafood. The aim was to investigate the presence of MPs in three bivalve’s species; oysters (Crassostrea gigas), clams (Ruditapes decussatus), and mussels (Mytilus galloprovincialis) produced in offshore and intertidal aquaculture in two different climate conditions. Water, bivalves and sediments were collected from each site and abundance size, colour, type and composition of the MPs polymers analysed. The most common colour in offshore aquaculture was blue while in intertidal was black, and the type was fragments. Sixty per cent of bivalves did not have MPs in their tissues Bivalves from offshore aquaculture was less impacted by MPs probably due to the hydrographic conditions and distance from the coast. Most of MPs ingested by bivalves were related to the plastic type used in aquaculture materials. Transformative solutions and/or procedures to eliminate plastic from aquaculture equipment are needed, and depuration might be a practical solution.
- Aquaculture in the crossroad of microplastic contaminationPublication . Bebianno, Maria; Manthopoulos, Michael; Nathan, Justine; Cristina, Sónia; Ribeiro, Laura; Luna-Araújo, Ravi; Icely, John; Dias Duarte Fragoso, Bruno; Moura, DelmindaPlastic pollution threatens life and human health, with microplastics (MP) linked to seafood consumption. MPs enter aquaculture through the environment and from aquaculture gear. During aquaculture production, plastic is used in nets and sacks for the growth process and in collecting and processing so it becomes important to expand the knowledge about how much MPs are present in seafood. The aim was to investigate the presence of MPs in three bivalve's species; oysters (Crassostrea gigas), clams (Ruditapes decussatus), and mussels (Mytilus galloprovincialis) produced in offshore and intertidal aquaculture in two different climate conditions. Water, bivalves and sediments were collected from each site and abundance, size, colour, type and composition of the MPs polymers analysed. The most common colour in offshore aquaculture was blue while in intertidal was black, and the type was fragments. Sixty per cent of bivalves did not have MPs in their tissues. Bivalves from offshore aquaculture was less impacted by MPs probably due to the hydrographic conditions and distance from the coast. Most of MPs ingested by bivalves were related to the plastic type used in aquaculture materials. Transformative solutions and/ or procedures to eliminate plastic from aquaculture equipment are needed, and depuration might be a practical solution.
- Microplastics hot spots at the South Iberian MarginPublication . Bebianno, Maria; Cristina, Sónia; Nathan, Justine; Goela, Priscila; Dias Duarte Fragoso, Bruno; Icely, John David; Moura, DelmindaThe persistent accumulation of microplastics (MPs) in sediments poses ecological risks to benthic organisms and contributes to the broader issue of marine pollution. This study quantitatively analysed MPs in sediments, water and mussels Mytilus galloprovincialis from eleven sites of the South Portuguese coast in two contrasting climatic seasons (summer and winter). MPs were detected in sediments, water, and M. galloprovincialis at all study sites, although their abundance, colour, size, and type varied across compartments, locations, and seasons. Three hot spots of MPs contamination were identified at the South Portuguese coast. In these areas, the concentration of MPs in sediments was three orders of magnitude higher than water and mussels. The MPs identified had distinct colour patterns: transparent particles dominated in sediments, while blue was the most common in water and mussels. A size-dependent accumulation pattern was observed in the sediments, suggesting selective retention of MPs according to natural particle size, and a relationship was observed between MP levels in sediments and in mussels. Polypropylene (PP) and polyethylene (PE) were dominant polymers in sediments while PP, PE and polyethylene terephthalate (PET) were consistently present in water and mussels. Polybuthyl methachrylate (PBMA) was also detected in surface water and ingested by mussels. These findings suggest that variability in MPs abundance and polymer composition is linked to differences in local human activities. They also provide strong evidence for the importance of controlling land-based sources of MPs, particularly those transported to the coastal area by transported by rivers.