Table 4.
Summary of the eight largest clusters, showing size, silhouette, and representative terms to characterize each cluster
| Cluster ID | Size | Silhouette | Mean (year) | Representative terms (LLR) | Keywords |
|---|---|---|---|---|---|
| #0 | 21 | 0.795 | 2019 | Perfluorooctane sulfonic acid | Perfluorooctane sulfonic acid; polystyrene microplastic; Eisenia fetida; behavior test; Scrobicularia plana |
| #1 | 20 | 0.825 | 2018 | Nanoparticle | Nanoparticle; microplastic pollution; oxidative stress; neurotoxicity; zebrafish Danio rerio |
| #2 | 15 | 0.818 | 2020 | Chemical sorption | Chemical sorption; Donax trunculus; accumulation; embryotoxicity; bivalves |
| #3 | 15 | 0.931 | 2019 | Hypoactivity | Hypoactivity; electroencephalogram; neurotransmitter; oxidative stress; microplastics |
| #4 | 14 | 0.929 | 2018 | Plastic pollution | Plastic pollution; systemic toxicity; molecular mechanisms; marine environment; toxicological impacts |
| #5 | 12 | 0.874 | 2021 | Waterborne | Waterborne; polyethylene microplastics; triphenyl phosphate; marine medaka (Oryzias melastigma); food chain |
| #6 | 10 | 0.849 | 2021 | Ferroptosis | Ferroptosis; glutamine; cerebellum; liver-brain axis; microplastic |
| #7 | 9 | 0.843 | 2019 | Marine microplastics | Marine microplastics; ecotoxicology; coastal pollution; Raman microspectroscopy; painted comber |
| #8 | 8 | 0.957 | 2021 | Propranolol | Propranolol; sulfamethoxazole; integrated biomarker response; transcriptome; ultraviolet irradiation |