Trophic magnification of Dechlorane Plus in the marine food webs of Fildes Peninsula in Antarctica. Issue 1 (15th April 2017)

• Record Type: Journal Article
• Authors: Na, Guangshui; Yao, Yao; Gao, Hui; Li, Ruijing; Ge, Linke; Titaley, Ivan A.; Santiago-Delgado, Lisandra; Massey Simonich, Staci L.
• Is Part Of: Marine pollution bulletin. Volume 117:Issue 1/2(2017)
• Page Start: 456
• Page End: 461
• Publication Date: 2017-04-15
• Subjects: Dechlorane Plus -- Food web -- Trophic magnification -- Stereoselection -- The Antarctic; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2017.01.049
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: The food web composition, assimilation efficiency of Dechlorane Plus (DP) in food web components, and even extrinsic conditions can affect the trophic biomagnification potentials of DP isomers in food webs. Antarctica ecological system is characterized by the presence of few consumers and simple trophic levels (TLs), which are crucial in discussing the behavior of contaminants. To assess the biomagnification potential of DP in the Antarctic food web, nine representative species were sampled and analyzed from the Fildes Peninsula. Results showed the DP concentrations ranged from 0.25 ng g − 1 to 6.81 ng g − 1 lipid weight in Antarctic biota and the concentrations of anti -DP and syn -DP showed significantly positive correlations with TLs ( p < 0.05, r a = 0.85; r s = 0.81, respectively), suggesting that syn -DP and anti -DP underwent biomagnification and the biomagnification ability of anti -DP was higher than that of syn -DP. The anti -DP fraction ( anti -DP/∑DP) (ƒanti = 0.23–0.53) of the organisms was lower than that of commercial products (ƒanti = 0.68), demonstrating ƒanti was changed during long-range atmospheric transport or stereoselection enrichment through the food web. Furthermore, based on food web magnification factors (FWMF) comparison between DP and polychlorinated biphenyls (PCBs), the biomagnification potential of DP was found to be similar to that of highly chlorinated PCBs. Highlights: The occurrence and biomagnification of Dechlorane Plus (DP) were investigated in the marine food webs of Fildes Peninsula in Antarctica. The biomagnification ability of anti -DP was higher than that of syn -DP. The similar biomagnification between DP and highly chlorinated PCBs was observed.