Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 53, Issue 16, Pages 9472-9480Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.9b00858
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Funding
- Chinese Academy of Sciences [XDA2004050203]
- National Natural Science Foundation [21677168, 91743204, 21677116]
- Youth Innovation Promotion Association [2018052]
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Little is currently known about the trophic transfer behavior of short-chain chlorinated paraffins (SCCPs) in terrestrial ecosystems. The trophodynamics of SCCPs were investigated in a typical terrestrial food chain (plant-plateau pika-eagle) from the interior of the Tibetan Plateau with an altitude of 4730 m. Pervasive contamination by SCCPs was found in the Tibetan Plateau samples, and the average concentrations of SCCPs in soil, plant, plateau pika, eagle, and gut content of eagle samples were 81.6 +/- 31.1, 173 +/- 70.3, 258 +/- 126, 108 +/- 59.6, and 268 +/- 93.9 ng/g (average +/- standard deviation, dry weight, dw), respectively. The trophic magnification factor (TMF) of SCCPs was 0.37, implying the trophic dilution of SCCPs in this terrestrial food chain. The TMF values of individual congener groups were positively correlated with the values of log K-ow, log K-oa and biotransformation half-life. As a result of long-range transport, SCCPs congeners with low molecular weight dominated in Tibetan Plateau species (C10+11 congeners = 76.9%, Cl5+6+7 congeners = 71.5%), which could partly explain the low biomagnification factors (BMFs) of SCCPs in the Tibetan Plateau.
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