Modeling the Vertical Transport of Copepod Fecal Particles under Nano/Microplastic Exposure.

ABSTRACT: Nano- and microplastics (NMPs) may significantly impact the marine carbon cycle, and fecal pellets produced by the copepods are crucial for vertical carbon transport. In this study, we investigated the effects of NMP size, concentration, and diatom supply on the production and settling of fecal pellets by the marine copepod Parvocalanus crassirostris. By employing an aggregation-induced emission fluorescence imaging technique, we visualized the distribution of NMPs in fecal pellets, measured their size and production rate, and developed a fluid dynamic model to simulate the settling process of fecal pellets in the water column. Our results indicated that NPs and MPs exhibited uniform and nonuniform distributions in the produced fecal materials, respectively. NMPs reduced both the si

SUBMITTER: Dong Z 

PROVIDER: S-EPMC12709576 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature