期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 178, 期 -, 页码 86-93出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2019.04.034
关键词
Cyclic methyl siloxanes; Trophic transfer; Marine food web; Bohai; China
资金
- National Natural Science Foundation of China [51779047, 21207011]
- Excellent Youth Foundation of Heilongjiang Province
- University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [UNPYSCT-2016001]
Trophic transfer of cyclic methyl siloxanes (CMS) in aquatic ecosystems is an important criterion for assessing its environmental risks. This study researched the trophic transfer of four CMS (octamethylcyclotetrasiloxane (D-4), decamethylcyclopentasiloxane (D-5), dodecamethylcyclohexasiloxane (D-6), and tetradecamethylcycloheptasiloxane (D-7)) in marine food web from zooplankton up to seabirds in the Chinese Bohai Sea. In the zooplankton-invertebrate-fish-seabird based food web, the significant trophic magnifications were found for D-4 to D-6 (D-4: R-2 = 0.040, p < 0.05, D-5: R-2 = 0.26, p < 0.0001, D-6: R-2 = 0.071, p < 0.001), and the significant trophic dilution was found for D-7 (R-2 = 0.026 and p < 0.05). The trophic magnification factors (TMF) for D-4 to D-7 were 1.7 (95% confidence interval: 1.1-2.6), 3.5 (2.5-5.0), 1.8 (1.3-2.6), and 0.63 (95% CI: 0.40-0.99) respectively. In the zooplankton-invertebrate-fish based food web, both significant trophic magnification for D-5 (R-2 = 0.16, p < 0.0001, TMF = 3.0) and significant trophic dilution for D-7 (R-2 = 0.073, p < 0.01, TMF = 0.4) were found, but for D-4 and D-6, the trophic magnifications were not significant (D-4: R-2 = 0.010, p = 0.23, D-6: R-2 = 0.010, p = 0.23). The trophic transfer of the legacy contaminant BDE-47 and BDE-99 were also conducted as the benchmark chemicals and significant positive correlation was found. As far as we know, this is the first research on the trophic transfer of CMS in the zooplankton-invertebrate-fish-bird food chain which provided new insight of these compounds in the area.
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