Potential microplastics impacts on African fishing resources

Masiá, Paula; Mateo, Juan L.; Arias, Andrés; Bartolomé, M.; Blanco, C.; Erzini, Karim; Loc’h, François Le; Power, Deborah M.; Rodriguez, Noemi; Schaal, Gauthier; Machado‐Schiaffino, Gonzalo; García‐Vázquez, Eva

doi:10.1016/j.scitotenv.2021.150671

Cited by 11 publications

(4 citation statements)

References 127 publications

(127 reference statements)

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“…Plastic and microplastic research in Africa remains limited compared to other continents, but recent efforts to highlight microplastic pollution in Africa has been made (Naidoo et al, 2015;Nel and Froneman, 2015;Biginagwa et al, 2016;Lourenco et al, 2017;Nel at al., 2017;Nel et al, 2018;Akindele et al, 2019;Dalu et al, 2019;Mayoma et al, 2019;Toumi et al, 2019;Weideman et al, 2019;Weideman et al, 2020;Dahms et al, 2020;Alimi et al, 2021;Dalu et al, 2021;Deme et al, 2022;Masiá et al, 2022). In South Africa, research has been conducted on microplastics in the Vaal River system, determining microplastic concentrations in water, sediment, and the ability for longdistance transfer of microplastics (Weideman et al, 2019;Weideman et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Gastric Microplastics in Clarias gariepinus of the Upper Vaal River, South Africa

Dahms

Tweddle

Greenfield

2022

Front. Environ. Sci.

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Microplastics are defined as plastics smaller than 5 mm down to 0.05 mm. These plastics enter the environment and undergo certain physical changes, most notably density changes and a relative increase of surface size. Microplastics can then release or absorb toxicants from the surrounding environment. These plastics may then enter the food chain from producers to top predators. In this study, microplastics were investigated in four study sites in the upper Vaal River, South Africa. The goal of the study was to determine the levels of plastics in water, sediment and a top predator, the benthic fish Clarias gariepinus. In this study, a 10% KOH digestion of water and fish, and density separation of sediment with NaCl (1.2 g cm3) was used to extract microplastics for identification. Microplastics were detected in water (3, 300 particles m−³), fish (7.47 particles per fish) and sediment (46.7 particles kg−1). Microplastic intake was not attributed to the microplastic shape or size of the fish that ingested it. This highlights the need to understand how niche-specific microplastic concentrations are, which will not only aid in quantifying microplastics accurately in the environment but to better understand how they may influence various ecosystems.

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Section: Introductionmentioning

confidence: 99%

Gastric Microplastics in Clarias gariepinus of the Upper Vaal River, South Africa

Dahms

Tweddle

Greenfield

2022

Front. Environ. Sci.

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“…A variety of previous studies have focused on the concentrations and distribution patterns of microplastics in the coral reef environments worldwide, from Africa to the Atlantic and from the South China Sea to South America. ,− However, the influences of microplastics in reef environments on its bioaccumulation by corals were usually neglected. In the present study, the correlation analysis showed that the microplastic concentration in P.…”

Section: Discussionmentioning

confidence: 99%

High Heterotrophic Plasticity of Massive Coral Porites pukoensis Contributes to Its Tolerance to Bioaccumulated Microplastics

Zhou

Tang

Cao

et al. 2023

Environ. Sci. Technol.

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Scleractinian corals have been observed to be capable of accumulating microplastics from reef environments; however, the tolerant mechanism is poorly known. Here, we examined the response of Porites pukoensis to microplastic pollution by analyzing algal symbiont density, energetic metabolism, and caspase3 activities (representing the apoptosis level) in the coral–Symbiodiniaceae association. The environments of three fringing reef regions along the south coast of Sanya City, Hainan Province of China, were polluted by microplastics (for example, microplastic concentrations in the seawater ranged from 3.3 to 46.6 particles L–1), resulting in microplastic accumulation in P. pukoensis (0.4–2.4 particles cm–2). The accumulation of microplastics was negatively correlated to algal symbiont density in the corals but not to caspase3 activities in the two symbiotic partners, demonstrating that P. pukoensis could tolerate accumulated microplastics despite the decrease of algal symbiont density. Furthermore, results from the carbon stable isotope and cellular energy allocation assay indicated that P. pukoensis obtained energy availability (mainly as lipid reserves) using the switch between heterotrophy and autotrophy to maintain energy balance and cope with accumulated microplastics. Collectively, P. pukoensis achieved tolerance to microplastic pollution by maintaining energy availability, which was largely attributed to its high heterotrophic plasticity.

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“…Because plastics are highly resistant to decomposition, they may persist in the environment for centuries, making them a hot topic of global governance [7] . Research shows that ocean plastic pollution kills 100,000 marine mammals and turtles, more than a million seabirds, and even more fish, invertebrates and other marine life each year [8] . Plastic pollution also has profound impacts on coastal communities, fisheries and economies.…”

Section: Introductionmentioning

confidence: 99%

Impact of the COVID-19 pandemic on research on marine plastic pollution – A bibliometric-based assessment

Wang

Huang

2022

Marine Policy

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Potential microplastics impacts on African fishing resources

Cited by 11 publications

References 127 publications

Gastric Microplastics in Clarias gariepinus of the Upper Vaal River, South Africa

Gastric Microplastics in Clarias gariepinus of the Upper Vaal River, South Africa

High Heterotrophic Plasticity of Massive Coral Porites pukoensis Contributes to Its Tolerance to Bioaccumulated Microplastics

Impact of the COVID-19 pandemic on research on marine plastic pollution – A bibliometric-based assessment

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