Entanglement of <i>Daphnia magna</i> by Fibrous Microplastics through “Hook and Loop” Action

Article Article scientifique Article Entanglement of <i>Daphnia magna</i> by Fibrous Microplastics through “Hook and Loop” Action eng 2024-04-30 2024-04-30 author Ma Cuizhu Environmental Biogeochemistry and Ecotoxicology, Department F.-A. Forel for Environmental and Aquatic Sciences, Faculty of Sciences, Earth and Environment Sciences, University of Geneva, 66 boulevard Carl-Vogt, CH-1211 Geneva 4, Switzerland 403516 author Shi Huahong 0000-0003-2978-0680 State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China author Slaveykova Vera 0000-0002-8361-2509 Environmental Biogeochemistry and Ecotoxicology, Department F.-A. Forel for Environmental and Aquatic Sciences, Faculty of Sciences, Earth and Environment Sciences, University of Geneva, 66 boulevard Carl-Vogt, CH-1211 Geneva 4, Switzerland 510054 Forel Communs (FOREL) 4c00279 10.1021/acs.estlett.4c00279 2328-8930 https://pubs.acs.org/doi/10.1021/acs.estlett.4c00279 Entanglement, often associated with the interaction of large marine plastics and larger animals, has not yet been reported in the context of microplastics (MPs) and small organisms. In this study, Daphnia magna was exposed to fibrous and fragmentary MPs at concentrations ranging from 1 to 1000 items/mL for 7 days. The results revealed that fibrous MPs tended to entangle with the second antennae and tail claws of D. magna, whereas fragmentary MPs merely adhered to the surface of the daphnids but do not exhibit entanglement. Additionally, the swimming speed and projected area of swimming trajectories of daphnids significantly decreased in the 100 items/mL group compared with the control. However, the occurrence of entanglement and slow swimming was less pronounced in the 1000 items/mL group due to the aggregation of fibrous MPs. Scanning electron microscopy revealed that D. magna possessed a rich spine structure on the surface of their bodies, particularly on their antennae and tails. The entanglement of D. magna by fibrous MPs resembled the action of manufactured “hook and loop”. Overall, the results of this research revealed that entanglement is observed in small animals exposed to fibrous MPs, highlighting the direct biological effects of MPs beyond ingestion. Microplastics Fibers Zooplankton Entanglement Behavior response Hook and loop Dewey 550 Dewey 333.7-333.9 18 Institut des sciences de l'environnement 0DB 41 Département F.-A. Forel des sciences de l'environnement et de l'eau 153 false 752 Environmental Biogeochemistry and Ecotoxicology 938 ISE Pôle Sciences 944 ISE Eau Environmental science & technology letters 23e2fc0a-43e0-4f42-a484-904e3512d44b Article (Published version) Public ma-et-al-2024.pdf 3037919 application/pdf CC BY-4.0 0b0f66fde518ec8a726cf7387b1632a99181562e61be5d7852ee9ee469cc3ce4 openAccess Centres et instituts / Institut des sciences de l'environnement Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département F.-A. Forel des sciences de l'environnement et de l'eau

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Entanglement of Daphnia magna by Fibrous Microplastics through “Hook and Loop” Action	Environmental science & technology letters			2024	177	117

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Ma, Cuizhu