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Sardenne F, Le Loc'h F, Bodin N, Mve-Beh JH, Munaron JM, Mbega JD, Nzigou AR, Sadio O, Budzinski H, Leboulanger C. Persistent organic pollutants and trace metals in selected marine organisms from the Akanda National Park, Gabon (Central Africa). MARINE POLLUTION BULLETIN 2024; 199:116009. [PMID: 38217912 DOI: 10.1016/j.marpolbul.2023.116009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 12/08/2023] [Accepted: 12/27/2023] [Indexed: 01/15/2024]
Abstract
Akanda National Park (ANP) is composed of mangrove ecosystems bordering Libreville, Gabon's capital. The contamination of aquatic resources from the ANP by persistent organic pollutants (POPs) and trace metals (TMs) was never evaluated. To provide a basis for their monitoring in the ANP, five species (two fish, two mollusks, and one crustacean) were analyzed from three sampling sites in 2017. Contamination levels for POPs and TMs were below maximum acceptable limits for seafood, including Cd and Pb. No DDT was found in any sample. Inter-specific differences were more obvious than the differences among sites, although the results may be biased by an unbalanced sampling design. The oyster Crassostrea gasar was the most contaminated species, making this species a good candidate to assess environmental contamination in the area. The studied species also contained essential elements, such as Fe, Zn and Mn at interesting levels in a nutritional point of view.
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Affiliation(s)
- Fany Sardenne
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, IUEM, F-29280 Plouzané, France.
| | - François Le Loc'h
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, IUEM, F-29280 Plouzané, France
| | - Nathalie Bodin
- Sustainable Ocean Seychelles, BeauBelle, Mahé, Seychelles
| | - Jean-Hervé Mve-Beh
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, IUEM, F-29280 Plouzané, France; Institut de Recherches Agronomiques et Forestières, CENAREST (Laboratoire d'Hydrobiologie et d'Ichtyologie), BP 2246 Libreville, Gabon
| | | | - Jean-Daniel Mbega
- Institut de Recherches Agronomiques et Forestières, CENAREST (Laboratoire d'Hydrobiologie et d'Ichtyologie), BP 2246 Libreville, Gabon
| | | | - Oumar Sadio
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, Dakar, Sénégal
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Saidon NB, Szabó R, Budai P, Lehel J. Trophic transfer and biomagnification potential of environmental contaminants (heavy metals) in aquatic ecosystems. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 340:122815. [PMID: 37898430 DOI: 10.1016/j.envpol.2023.122815] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 10/30/2023]
Abstract
Physical, chemical weathering and volcanic eruptions release heavy metals into soils and surface waters naturally. Contaminants from anthropogenic sources originated from industrial and municipality waste substantially modify and increase their contributions. They are then absorbed by fish gills, amphipod cuticles, and other sensitive organs of aquatic creatures. This article discusses the essences on the determination, potential and plausible factors of trophic transfer and biomagnification of environmental contaminants particularly heavy metals across aquatic ecosystem. In general, arsenic is found to be bio-diminished across food webs in freshwater ecosystem while it biomagnified in marine ecosystem of higher trophic level (tertiary consumer of predatory fish) and dilute its concentration from lower trophic level (from producer to bottom level of consumer, secondary and lastly to tertiary consumer (forage fish)). Early study for Cadmium shown that it has no potential for biomagnification while later studies prove that cadmium does magnify for gastropod and epiphyte-based food webs. Mercury shown obvious biomagnification potential where it can bio-magnify from trophic level as low as particulate organic matter (POM) to higher trophic of fish. These findings proved that aquatic ecosystems must be preserved from contamination not just for human benefit, but also to prevent environmental degradation and biodiversity loss.
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Affiliation(s)
- Nadhirah B Saidon
- Department of Plant Protection, Hungarian University of Agriculture and Life Sciences, Georgikon Campus, 8360, Keszthely, Hungary
| | - Rita Szabó
- Department of Plant Protection, Hungarian University of Agriculture and Life Sciences, Georgikon Campus, 8360, Keszthely, Hungary
| | - Péter Budai
- Department of Plant Protection, Hungarian University of Agriculture and Life Sciences, Georgikon Campus, 8360, Keszthely, Hungary.
| | - József Lehel
- Department of Food Hygiene, University of Veterinary Medicine Budapest, 1078, Budapest, Hungary; National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, University of Veterinary Medicine Budapest, 1078, Budapest, Hungary
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