Trophic exposure to environmentally relevant concentrations of nanoplastics induces slight modulation of the antioxidant system in the estuarine bivalve Scrobicularia plana
Abstract
Plastic contamination is increasingly recognized as a critical issue in estuarine ecosystems, posing potential threats to aquatic organisms. Although estuaries represent key transition zones for plastics moving from continental sources to the ocean, their ecological fate and effects in these environments remain insufficiently studied. In particular, the trophic transfer of micro- and nanoplastics (NPs) through trophic chains and the associated health risks are still poorly understood. This study aimed to assess the ecotoxicological consequences of trophic exposure to different types of nanoplastics in the estuarine bivalve Scrobicularia plana. The marine microalga Tetraselmis suecica was exposed for 48 h to environmentally relevant NP concentrations (0.008, 10, and 100 µg.L-1). Two categories of NPs were investigated: environmentally derived nanoplastics produced from field-collected macroplastics (ENV NPs) and commercial polystyrene nanoparticles (PS NPs). Following algal exposure, S. plana individuals were fed with NP-contaminated algae, and biological responses were evaluated at both the individual and biochemical levels. RESULTS: revealed that trophic exposure to NPs primarily induced oxidative stress, as evidenced by increased catalase (CAT) activity, with no statistically detectable alterations in condition index, clearance rate, or immune response. Finally, outcomes from this trophic transfer experiment were compared to those obtained in a previous study involving direct NP exposure under laboratory conditions.
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BibTeX
@article{latchere2026trophic,
title = {{Trophic exposure to environmentally relevant concentrations of nanoplastics induces slight modulation of the antioxidant system in the estuarine bivalve Scrobicularia plana}},
author = {Oihana Latchere and Isabelle Métais and Hanane Perrein-Ettajani and Magalie Lemoing and Agnès Feurtet-Mazel and Julien Gigault and Mohammed Mouloud and Amélie Châtel and Magalie Baudrimont},
journal = {Ecotoxicology and Environmental Safety},
year = {2026},
month = oct,
doi = {10.1016/j.ecoenv.2026.120217},
url = {https://hal.science/hal-05807266v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Trophic exposure to environmentally relevant concentrations of nanoplastics induces slight modulation of the antioxidant system in the estuarine bivalve Scrobicularia plana
AU - Oihana Latchere
AU - Isabelle Métais
AU - Hanane Perrein-Ettajani
AU - Magalie Lemoing
AU - Agnès Feurtet-Mazel
AU - Julien Gigault
AU - Mohammed Mouloud
AU - Amélie Châtel
AU - Magalie Baudrimont
PY - 2026
DA - 2026/10/28
JO - Ecotoxicology and Environmental Safety
DO - 10.1016/j.ecoenv.2026.120217
UR - https://hal.science/hal-05807266v1
AB - Plastic contamination is increasingly recognized as a critical issue in estuarine ecosystems, posing potential threats to aquatic organisms. Although estuaries represent key transition zones for plastics moving from continental sources to the ocean, their ecological fate and effects in these environments remain insufficiently studied. In particular, the trophic transfer of micro- and nanoplastics (NPs) through trophic chains and the associated health risks are still poorly understood. This study aimed to assess the ecotoxicological consequences of trophic exposure to different types of nanoplastics in the estuarine bivalve Scrobicularia plana. The marine microalga Tetraselmis suecica was exposed for 48 h to environmentally relevant NP concentrations (0.008, 10, and 100 µg.L-1). Two categories of NPs were investigated: environmentally derived nanoplastics produced from field-collected macroplastics (ENV NPs) and commercial polystyrene nanoparticles (PS NPs). Following algal exposure, S. plana individuals were fed with NP-contaminated algae, and biological responses were evaluated at both the individual and biochemical levels. RESULTS: revealed that trophic exposure to NPs primarily induced oxidative stress, as evidenced by increased catalase (CAT) activity, with no statistically detectable alterations in condition index, clearance rate, or immune response. Finally, outcomes from this trophic transfer experiment were compared to those obtained in a previous study involving direct NP exposure under laboratory conditions.
SN - 0147-6513
SN - 1090-2414
ER -