Bioaccumulation and trophic transfer of organophosphate esters in tropical marine food web, South China Sea

Last modified: 
July 10, 2020 - 6:55pm
Type: Journal Article
Year of publication: 2020
Date published: 10/2020
Authors: Yang Ding, Minwei Han, Zhiqiang Wu, Ruijie Zhang, An Li, Kefu Yu, Yinghui Wang, Wen Huang, Xiaobo Zheng, Bixian Mai
Journal title: Environment International
Volume: 143
Pages: 105919
ISSN: 01604120

Environmental exposure to organophosphate esters (OPEs) continues to be a concern. Little is known about their bioaccumulation and trophodynamics, especially in tropical food webs. This study collected seawater and fifteen types of organism from a tropical ecosystem, South China Sea, to investigate the species-specific compositional, bioaccumulation, and trophic transfer of OPEs. The total concentrations of 11 target OPEs (ng/g dw) in the organisms decreased with the increase of their trophic levels in the order: phytoplankton (922) > zooplankton (660) > oysters (309) > crabs (225) > coral tissues (202) > fishes (58.2). The composition profiles (relative abundances) of OPEs were different among the species of organisms, which is likely affected by metabolism and the physicochemical property of OPEs. The trophic biomagnification of tripentyl phosphate (TPTP) in the pelagic food web was unexpected and requires further investigation. The trophic magnification factors (TMFs) of OPEs were generally lower in this tropical aquatic food web than in temperate and frigid aquatic food web. Our analysis suggests that there is a significant positive linear correlation between latitude and TMF. Intakes of OPEs through the consumption of the seafood involved in this work does not pose health risk to adults.

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