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Polycyclic aromatic hydrocarbons in coral reefs with a focus on Scleractinian corals: A systematic overview

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SCIENCE OF THE TOTAL ENVIRONMENT
卷 877, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.scitotenv.2023.162868

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Bibliometric analysis; Polyaromatic hydrocarbons; Unconventional PAHs; Coral tissue; Skeleton; Zooxanthellae; Mucus

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This study investigates the impact of petroleum exploitation and oil spills on coral reefs in marine ecosystems through a systematic review and bibliometric analysis. The main matrices studied are sediments, corals, and water, while air and other invertebrates have been less studied. Recommendations for future research include improving the detection capability of non-conventional PAHs, conducting more studies in underexplored regions in developing countries, and establishing databases to facilitate management planning.
The impact of petroleum exploitation and oil spills in marine ecosystems has increased over time. Among the concerns regarding these events, the impact on coral reefs stand out because this ecosystem has ecological and economic importance and is globally threatened. We performed a systematic review and bibliometric analysis of studies that determine polycyclic aromatic hydrocarbons (PAHs) in coral reefs, attempting to answer how the studies were distributed around the globe, the main environmental matrices and species of coral studied, the main PAHs found and their mean concentrations, and the methodology used. A bibliographic search resulted in 42 studies with worldwide distribution. The bibliometric results presented more explored terms, such as sediments and toxicology, and newly investigated terms, which should encourage a new area of study, such as those related to zooxanthellae and mucus. The main matrices studied in coral reefs are sediments, corals, and water, whereas air and other invertebrates have rarely been studied. Approximately 45 species of corals with several morphotypes have been reported. PAHs recommended by the United States Environmental Protection Agency (US EPA) were analyzed in all studies, while additional compounds were analyzed in only five. The methods used to determine hydrocarbons are predominantly the most traditional; however, for corals, studies have tended to separate tissue, zooxanthellae, skeleton, and mucus. In the future, we recommend investment in improving the capacity to detect non-conventional PAHs, more studies in regions that are rarely explored in developing countries, and the creation of databases to facilitate management planning on marine coasts.

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