The Arctic,though remote,is exceptionally vulnerable to chemical contaminants that threaten its fragile ecosystems.Bisphenols(BPs),a class of endocrine-disrupting chemicals used in plastics and resins,are now detected...The Arctic,though remote,is exceptionally vulnerable to chemical contaminants that threaten its fragile ecosystems.Bisphenols(BPs),a class of endocrine-disrupting chemicals used in plastics and resins,are now detected across the Arctic,but the risks posed by their many analogues are poorly understood.Most studies have focused on documenting their presence,leaving a critical gap in our understanding of whether these compounds bioaccumulate in Arctic food webs and to what extent local,within-Arctic pollution contributes to the overall burden.Here we show,through a comprehensive analysis of 32 BPs in 134 samples from a Norwegian Arctic food web,that multiple BP analogues not only bioaccumulate but also biomagnify from plankton up to polar bears.We found that 5,5′-(1-methylethylidene)bis[(1,1′-biphenyl)-2-ol](BPPH)exhibited the highest trophic magnification factor(a value of 2.3),and we documented total BP concentrations in polar bear tissues up to 1396 ng g^(-1)wet weight,orders of magnitude higher than in lower-trophic-level species.Furthermore,our analysis identified distinct local pollution sources,such as a firefighting training site releasing 2,4,6-trichlorophenol(2,4,6-TBP)and landfill leachate contributing other BPs to the local environment.These findings provide the first evidence of trophic magnification for multiple BPs in a polar food chain and underscore the urgent need to incorporate food-web dynamics and local source management into ecological risk assessments for the Arctic.展开更多
基金supported by the National Natural Science Foundation of China (No.52321005)Provincial Key Research and Development Program of Heilongjiang (No. 2023ZX02C04)+4 种基金supported by the open project of the National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge (No. Z2024B003)the Research Council of Norway (RCN) for funding the project No. 268258 “Reducing the impact of fluorinated compounds on the environment and human health – PFOslo”The support of the University Center in Svalbard (UNIS)the Norwegian University of Life Sciences (NMBU)the Norwegian Geotechnical Institute (NGI) for field work and logistical support is greatly appreciated
文摘The Arctic,though remote,is exceptionally vulnerable to chemical contaminants that threaten its fragile ecosystems.Bisphenols(BPs),a class of endocrine-disrupting chemicals used in plastics and resins,are now detected across the Arctic,but the risks posed by their many analogues are poorly understood.Most studies have focused on documenting their presence,leaving a critical gap in our understanding of whether these compounds bioaccumulate in Arctic food webs and to what extent local,within-Arctic pollution contributes to the overall burden.Here we show,through a comprehensive analysis of 32 BPs in 134 samples from a Norwegian Arctic food web,that multiple BP analogues not only bioaccumulate but also biomagnify from plankton up to polar bears.We found that 5,5′-(1-methylethylidene)bis[(1,1′-biphenyl)-2-ol](BPPH)exhibited the highest trophic magnification factor(a value of 2.3),and we documented total BP concentrations in polar bear tissues up to 1396 ng g^(-1)wet weight,orders of magnitude higher than in lower-trophic-level species.Furthermore,our analysis identified distinct local pollution sources,such as a firefighting training site releasing 2,4,6-trichlorophenol(2,4,6-TBP)and landfill leachate contributing other BPs to the local environment.These findings provide the first evidence of trophic magnification for multiple BPs in a polar food chain and underscore the urgent need to incorporate food-web dynamics and local source management into ecological risk assessments for the Arctic.
