Trophic Dilution of Short-Chain Chlorinated Paraffins in a Plant-Plateau Pika-Eagle Food Chain from the Tibetan Plateau
Trophic Dilution of Short-Chain Chlorinated Paraffins in a Plant-Plateau Pika-Eagle Food Chain from the Tibetan Plateau
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青藏高原植物-高原鼠兔-鹰食物链中短链氯化石蜡的营养稀释
DOI：
10.1021/acs.est.9b00858
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发表时间：
2019
影响因子：
11.4
通讯作者：
Jiang Guibin
中科院分区：
文献类型：
--
作者：
Li Huijuan;Bu Duo;Fu Jianjie;Gao Yan;Cong Zhiyuan;Zhang Guoshuai;Wang Yawei;Chen Xiangfeng;Zhang Aiqian;Jiang Guibin
目前对短链氯化石蜡（SCCPs）在陆地生态系统中的营养转移行为知之甚少。分别为6±31.1、173±70.3、258±126、108±59.6、268±93.9 ng/g（平均±标准差，干重，dw）。SCCPs的营养放大因子（TMF）为0.37，表明SCCPs在该陆地食物链中存在营养稀释。各同源群的TMF值与logKow、logkoa和生物转化半衰期呈正相关。9%， Cl5+6+7同系物= 71。
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 logKow, logKoaand biotransformation half-life. As a result of long-range transport, SCCPs congeners with low molecular weight dominated in Tibetan Plateau species (C10+11congeners = 76.9%, Cl5+6+7congeners = 71.5%), which could partly explain the low biomagnification factors (BMFs) of SCCPs in the Tibetan Plateau.