Persistence and Recovery of Polystyrene and Polymethyl Methacrylate Microplastic Toxicity on Diatoms.

ABSTRACT: The increasing pollution of polystyrene (PS) and polymethyl methacrylate (PMMA) microplastics (MPs) has become a global marine environmental problem. Diatoms contribute nearly 40% of marine primary productivity and shape the nitrogen cycle in the oceans. However, the persistence of the phytotoxicity of MPs on diatoms, especially nitrogen assimilation, remains largely unknown. To examine the persistence of PS and PMMA toxicity in diatoms, two subexperiments (a 96 h exposure followed by a recovery phase) were conducted on Thalassiosira pseudonana at concentrations ranging from 0.001 to 1 mg/L. The results showed that PS and PMMA inhibited algal growth by 3.76-6.49% and 4.44-8.37%; increased oxidative stress by 10.06-30.51% and 30.46-38.12%; and caused ultrastructural damage by 14.24-2

SUBMITTER: Meng C 

PROVIDER: S-EPMC12115889 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature