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Biomagnification and trophic transfer of total mercury and methylmercury in a sub-tropical montane forest food web, southwest China
Li, Chan; Xu, Zhidong1,2; Luo, Kang3,4,5; Chen, Zhuo; Xu, Xiaohang1,2; Xu, Chengxiang6; Qiu, Guangle1
2021
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume277Issue:xPages:-
AbstractLittle is known about the bioaccumulation and trophic transfer of total mercury (THg) and methyl-mercury (MeHg) via food webs in terrestrial ecosystems, especially in subtropical forest ecosystems. In the present study, THg and MeHg were determined as well as the carbon (delta C-13) and nitrogen (delta N-15) isotope composition in samples of soils, plants, invertebrates, and songbird feathers to construct food webs in a remote subtropical montane forest in Mt. Ailao, southwest China and assess the bioaccumulation, biomagnification, and trophic transfer of Hg. Results showed that the trophic levels (TLs) of all consumers ranged from 0.8 to 3.3 and followed the order of songbirds > spiders > omnivorous insects > herbivorous insects > plants, and THg and MeHg exhibited a clear biomagnification up the food chain from plants-herbivorous/omnivorous insects-spiders-songbirds. The lowest MeHg concentration was observed in pine needles ranged from 0.104 to 0.949 ng g(-1) with only a 1.6% ratio of MeHg to THg (MeHg%), while the highest MeHg concentrations ranged from 425 to 5272 ng g(-1) in songbirds with MeHg% values of up to 96%. High values of trophic magnification slope (TMS) for THg (0.22) and MeHg (0.38) were observed in plant-invertebrate-songbird food chain, verifying the significant bioaccumulation of Hg, particularly MeHg, in the remote subtropical forest ecosystem. This study confirmed the production and efficient biomagnification of MeHg in remote subtropical montane forest and the significant bioaccumulation of MeHg in terrestrial top predators. (C) 2021 Elsevier Ltd. All rights reserved.
KeywordMethylmercury Biomagnification Trophic transfer Montane food webs Sub-tropical forest ecosystems
Subject AreaEnvironmental Sciences & Ecology
DOI10.1016/j.chemosphere.2021.130371
Indexed BySCI
Language英语
WOS IDWOS:000648342100119
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/12324
Collection2012年后新成立研究组
Affiliation1.Guizhou Normal Univ, Sch Chem & Mat Sci, Guiyang 550001, Peoples R China
2.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Ctr Integrat Conservat, Xishuangbanna Trop Bot Garden, Xishuangbanna 666303, Peoples R China
5.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Xishuangbanna 666303, Peoples R China
6.Chinese Acad Sci, Ailaoshan Stn Subtrop Forest Ecosyst Studies, Jingdong 676200, Peoples R China
7.Guizhou Normal Univ, Sch Life Sci, Guiyang 550001, Peoples R China
Recommended Citation
GB/T 7714
Li, Chan,Xu, Zhidong,Luo, Kang,et al. Biomagnification and trophic transfer of total mercury and methylmercury in a sub-tropical montane forest food web, southwest China[J]. CHEMOSPHERE,2021,277(x):-.
APA Li, Chan.,Xu, Zhidong.,Luo, Kang.,Chen, Zhuo.,Xu, Xiaohang.,...&Qiu, Guangle.(2021).Biomagnification and trophic transfer of total mercury and methylmercury in a sub-tropical montane forest food web, southwest China.CHEMOSPHERE,277(x),-.
MLA Li, Chan,et al."Biomagnification and trophic transfer of total mercury and methylmercury in a sub-tropical montane forest food web, southwest China".CHEMOSPHERE 277.x(2021):-.
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