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Terrestrial methylmercury bioaccumulation in a pine forest food chain revealed by live nest videography observations and nitrogen isotopes
Luo, Kang2,3,4; Xu, Zhidong1,4; Wang, Xun5; Quan, Rui-Chang; Lu, Zhiyun2,3; Bi, Wenqi6; Zhao, Hai7; Qiu, Guangle1
2020
Source PublicationENVIRONMENTAL POLLUTION
ISSN0269-7491
Volume263Issue:xPages:-
Abstract

In comparison to the extensively documented mercury (Hg) biomagnification in food chains of aquatic/or aquatic-related systems, Hg biomagnification in food chains in strictly terrestrial systems is poorly explored. Here, we report Hg biomagnification through food webs in a monoculture subtropical pine forest in southwest China. A clear pine needle-caterpillar-tit nestling food chain was determined with the use of live nest videography observations combined with stable isotope analysis (SIA). Simultaneously, a potential pine needle-herbivorous/omnivorous insect-mantis/lacewing/spider food chain was identified by SIA. The results verify that dietary composition plays a pivotal role in terrestrial food chains. Distinct total Hg (THg) and methylmercury (MeHg) biomagnification through the determined and potential food chains was observed, with quite similar efficiency of Hg biomagnification based on the trophic magnification slope (TMS) (TMSTHg was 0.18 +/- 0.03 and TMSMeHg was 0.36 +/- 0.05 for the determined food chain; and TMSTHg was 0.18 +/- 0.04 and TMSMeHg was 0.38 +/- 0.07 for the potential food chain). The TMS values were significantly higher than those from freshwater studies in tropical regions (0.12 +/- 0.12 for THg and 0.16 +/- 0.07 for MeHg) and forest studies in temperate regions (0.20-0.28 for MeHg). We recommend live nest videography observations combined with nitrogen isotope analysis when specifically assessing the biomagnification of environmental pollutants through food webs involving nestlings of free-living birds. (C) 2020 Elsevier Ltd. All rights reserved.

KeywordMercury Methylmercury Biomagnification Terrestrial food chain Nest videography Nitrogen isotopes
Subject AreaEnvironmental Sciences & Ecology
DOI10.1016/j.envpol.2020.114530
Indexed BySCI
Language英语
WOS IDWOS:000539427600108
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11790
Collection支撑系统
Affiliation1.Chinese Acad Sci, Ctr Integrat Conservat, Xishuangbanna Trop Bot Garden, Xishuangbanna 666303, Peoples R China
2.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China
3.Chinese Acad Sci, Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Xishuangbanna 666303, Peoples R China
4.Chinese Acad Sci, Ailaoshan Stn Subtrop Forest Ecosyst Studies, Jingdong 676200, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Southwest Univ, Coll Resources & Environm, Chongqing 400715, Peoples R China
7.Southwest Forestry Univ, Kunming 650224, Yunnan, Peoples R China
8.Forestry & Grassland Adm Jingdong Cty, Jingvdong 676200, Peoples R China
Recommended Citation
GB/T 7714
Luo, Kang,Xu, Zhidong,Wang, Xun,et al. Terrestrial methylmercury bioaccumulation in a pine forest food chain revealed by live nest videography observations and nitrogen isotopes[J]. ENVIRONMENTAL POLLUTION,2020,263(x):-.
APA Luo, Kang.,Xu, Zhidong.,Wang, Xun.,Quan, Rui-Chang.,Lu, Zhiyun.,...&Qiu, Guangle.(2020).Terrestrial methylmercury bioaccumulation in a pine forest food chain revealed by live nest videography observations and nitrogen isotopes.ENVIRONMENTAL POLLUTION,263(x),-.
MLA Luo, Kang,et al."Terrestrial methylmercury bioaccumulation in a pine forest food chain revealed by live nest videography observations and nitrogen isotopes".ENVIRONMENTAL POLLUTION 263.x(2020):-.
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