A scientometric analysis of global trends in polycyclic aromatic hydrocarbon (PAH) research and their ecotoxicological impact on aquatic organisms

Document Type : Original research

Authors

1 Programa de Pós-graduação em Biologia de Ambientes Aquáticos Continentais, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Rio Grande, RS, 96203-900, Brazil

2 MBA em Ciência de Dados, Instituto de Ciências Matemáticas e de Computação, Universidade de São Paulo, Av. Trabalhador São-Carlense, 400, São Carlos, SP, 13566-590, Brazil

Abstract

Polycyclic aromatic hydrocarbons (PAHs) are persistent pollutants that pose serious risks to aquatic ecosystems and remain a challenge for environmental monitoring. To map scientific advances in this field, we conducted a scientometric analysis of 1,336 articles published between 1945 and 2022 in the Web of Science database that investigated the impacts of PAHs on aquatic environments through organismal responses. The analysis revealed a marked increase in publications since the 1990s, with the United States, Canada, and China leading research output. Fish were the predominant model organisms—particularly Oncorhynchus mykiss, Danio rerio, and Fundulus heteroclitus—and biomarkers and bioassays represented the most frequently used methodological approaches. Despite significant progress, gaps remain regarding adaptive responses and the taxonomic breadth of studied species. By outlining trends, collaborations, and underexplored areas, this review provides a comprehensive overview to guide future research and inform environmental policies aimed at mitigating the impacts of PAHs on aquatic ecosystems.

Keywords

International Aquatic Research
Volume 17, Issue 4
December 2025
Pages 353-364

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