Cited by 2Microplastics and Plastic PollutionEnvironmental Toxicology and EcotoxicologyCrustacean biology and ecology

Environmentally relevant concentrations of microplastics and phenanthrene show limited effects on the behaviour and physiology of green crab lineages

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Cozzolino, Lorenzo, Nicastro, Katy R., McQuaid, Christopher D., Halldórsson, Halldór P., Lima, Fernando P., Zardi, Gerardo I.·2025·Ecotoxicology and Environmental Safety

Abstract

Plastic pollution is a growing environmental concern, with microplastics (MPs) and associated contaminants such as polycyclic aromatic hydrocarbons (PAHs) jeopardising the resilience and long-term survival of marine species. While species-specific effects have been well-documented, the role of intraspecific diversity in modulating species' responses to these contaminants remains largely neglected. This study investigates whether genetically distinct lineages of the green crab ( Carcinus maenas ) differ in their behavioural and physiological responses to environmentally relevant concentrations of polyethylene microplastics (PE) and PE contaminated with phenanthrene (PE+PHE). Juvenile crabs from the Southwest European (SWE) and Icelandic (ICE) populations were exposed to control seawater, PE, or PE+PHE for 72 h, and their behavioural (i.e., food contest) and physiological performances (i.e., heart rate) were assessed. Overall, there were no significant effects of PE or PE+PHE on key behavioural traits related to food competition (e.g., latency to initiate movement, interbout intervals, contest outcome) or on physiological parameters such as heart rate. However, resource possession was significantly reduced in ICE crabs exposed to PE. Our findings suggest that C. maenas exhibits short-term resilience to MPs and PAHs, with similar behavioural responses across distinct genotypic lineages (SWE = ICE). However, differences in heart rates between genetically distinct populations, even in control conditions, highlight the potential effect of lineage-specific physiological plasticity. In addition, high inter-individual variability in behavioural responses suggests susceptibility to MPs and PAHs may not be uniform within populations. Long-term assessments incorporating individual-based analyses are needed to fully understand the complex interplay between plastic pollution, genetic diversity, and behavioural plasticity in this marine species. • We test whether intraspecific diversity affects species responses to microplastic. • We compare two genetic lineages of the European green crab ( Carcinus maenas ). • We observe limited intraspecific effects on crab behaviour and physiology. • Heart rate differs between crab lineages even under control conditions. • High individual variability suggests that susceptibility to pollution is not uniform.

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Authors
Cozzolino, L., Nicastro, K. R., McQuaid, C. D., Halldórsson, H. P., Lima, F. P., & Zardi, G. I.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Rhodes University (ZA)
  • University of Iceland (IS)
  • Centro de Investigação em Biodiversidade e Recursos Genéticos (PT)
Corresponding author
Cozzolino, Lorenzo
Venue
Ecotoxicology and Environmental Safety
Publisher
Elsevier BV
Published
2025-09
Volume
303
Pages
118829
ISSN
0147-6513 (ISSN-L)
OpenAlex
W4413110660
Cited by
2
References
132
Citations by year
2026: 2
FWCI
0.47
Type
journal article
Language
en
Open access
Locations
  • Ecotoxicology and Environmental Safety (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) (submittedVersion, cc-by)
  • HAL (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Fundação para a Ciência e a Tecnologia (UIDB/04326/2020, UID/Multi/04326/2021, UIDP/04326/2020, LA/P/0101/2020)
  • Agence Nationale de la Recherche (SAN22202)
  • Office français de la biodiversité
  • Erasmus+ (SEP25101, 2024)
Topics
  • Physical Sciences › Environmental Science › Pollution › Microplastics and Plastic Pollution
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
  • Physical Sciences › Environmental Science › Ecology › Crustacean biology and ecology
Keywords
microplastics, phenanthrene, polycyclic aromatic hydrocarbons, Carcinus maenas, intraspecific genetic diversity, polyethylene microplastics, heart rate, physiological plasticity, interindividual variability, plastic pollution
MeSH terms
Microplastics, Animals, Behavior, Animal, Brachyura, Phenanthrenes, Water Pollutants, Chemical, Polyethylene

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