Ecological risk assessment of hydrocarbons and metals in coastal sediments and bioindicator mussels in Buenos Aires, Argentina.
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| Auteurs principaux: | , , , |
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| Format: | Artículo científico |
| Langue: | en |
| Publié: |
Environmental pollution (Barking, Essex : 1987)
2025
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| _version_ | 1868266141734928385 |
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| author | Landro, Sonia Maribel Cappelletti, Natalia Elsa Cajaraville, Miren P Arrighetti, Florencia |
| author_facet | Landro, Sonia Maribel Cappelletti, Natalia Elsa Cajaraville, Miren P Arrighetti, Florencia Landro, Sonia Maribel Cappelletti, Natalia Elsa Cajaraville, Miren P Arrighetti, Florencia |
| collection | PubMed - marine biology |
| contents | Ecological risk assessment of hydrocarbons and metals in coastal sediments and bioindicator mussels in Buenos Aires, Argentina. Landro, Sonia Maribel Cappelletti, Natalia Elsa Cajaraville, Miren P Arrighetti, Florencia Coastal ecosystems in Latin America face growing anthropogenic pressures, yet region-specific data on contaminant distribution and bioaccumulation remain scarce. This study evaluates aliphatic hydrocarbons (AHs), polycyclic aromatic hydrocarbons (PAHs), and metals (Cd, Cr, Ni, Pb, Zn) in sediments and the native mussel Brachidontes rodriguezii along Mar del Plata, Argentina's most populous marine coastal city. Samples from three sites -varying in human influence (S1: wastewater treatment plant discharge, S2: port area, S3: low urbanized area)- were collected seasonally (2018-2019). Sediments showed spatial hydrocarbons variability: the port (S2) had significantly higher ∑AHs (oil-related), while all sites exhibited high PAHs contamination. Hydrocarbons were mainly petrogenic (AHs) and pyrolytic (PAHs). Based on total PAH levels, including the unresolved complex mixture (UCM), contamination at S3 was high, while at S1 and S2 it was very high. The concentrations of metals in sediments were generally low, with no significant spatial variations. The SQG-Qs indicated low environmental risk for the sediment matrix. In mussels, hydrocarbons were widespread, with S2 displaying high levels of isoprenoids, UCM, and PAHs across seasons, suggesting a long history of petrogenic contamination and possible past oil spills. PAH levels exceeded other bivalve species in monitoring programs worldwide, potentially due to B. rodriguezii's small size. Metals were mostly undetected or within reported ranges of mussels from Argentina. However, Cd in S3 mussels exceeded international food safety limits for bivalves, likely linked to agricultural runoff. This study confirms B. rodriguezii as a sensitive bioindicator and underscores localized pollution risks. We emphasize the need for integrated monitoring using chemical analysis combined with biomarkers and stricter regulations to safeguard coastal ecosystems. Additionally, it provides baseline data for ongoing monitoring efforts in Latin America. |
| format | Artículo científico |
| id | pubmed_41093234 |
| institution | PubMed |
| language | en |
| publishDate | 2025 |
| publisher | Environmental pollution (Barking, Essex : 1987) |
| record_format | pubmed |
| spellingShingle | Ecological risk assessment of hydrocarbons and metals in coastal sediments and bioindicator mussels in Buenos Aires, Argentina. Landro, Sonia Maribel Cappelletti, Natalia Elsa Cajaraville, Miren P Arrighetti, Florencia Ecological risk assessment of hydrocarbons and metals in coastal sediments and bioindicator mussels in Buenos Aires, Argentina. Landro, Sonia Maribel Cappelletti, Natalia Elsa Cajaraville, Miren P Arrighetti, Florencia Coastal ecosystems in Latin America face growing anthropogenic pressures, yet region-specific data on contaminant distribution and bioaccumulation remain scarce. This study evaluates aliphatic hydrocarbons (AHs), polycyclic aromatic hydrocarbons (PAHs), and metals (Cd, Cr, Ni, Pb, Zn) in sediments and the native mussel Brachidontes rodriguezii along Mar del Plata, Argentina's most populous marine coastal city. Samples from three sites -varying in human influence (S1: wastewater treatment plant discharge, S2: port area, S3: low urbanized area)- were collected seasonally (2018-2019). Sediments showed spatial hydrocarbons variability: the port (S2) had significantly higher ∑AHs (oil-related), while all sites exhibited high PAHs contamination. Hydrocarbons were mainly petrogenic (AHs) and pyrolytic (PAHs). Based on total PAH levels, including the unresolved complex mixture (UCM), contamination at S3 was high, while at S1 and S2 it was very high. The concentrations of metals in sediments were generally low, with no significant spatial variations. The SQG-Qs indicated low environmental risk for the sediment matrix. In mussels, hydrocarbons were widespread, with S2 displaying high levels of isoprenoids, UCM, and PAHs across seasons, suggesting a long history of petrogenic contamination and possible past oil spills. PAH levels exceeded other bivalve species in monitoring programs worldwide, potentially due to B. rodriguezii's small size. Metals were mostly undetected or within reported ranges of mussels from Argentina. However, Cd in S3 mussels exceeded international food safety limits for bivalves, likely linked to agricultural runoff. This study confirms B. rodriguezii as a sensitive bioindicator and underscores localized pollution risks. We emphasize the need for integrated monitoring using chemical analysis combined with biomarkers and stricter regulations to safeguard coastal ecosystems. Additionally, it provides baseline data for ongoing monitoring efforts in Latin America. |
| title | Ecological risk assessment of hydrocarbons and metals in coastal sediments and bioindicator mussels in Buenos Aires, Argentina. |
| url | https://pubmed.ncbi.nlm.nih.gov/41093234/ |