GYIG OpenIR  > 环境地球化学国家重点实验室  > 期刊论文
Enhanced accumulation and storage of mercury on subtropical evergreen forest floor: Implications on mercury budget in global forest ecosystems
Xun Wang; Che-Jen Lin; Zhiyun Lu; Hui Zhang; Yiping Zhang; Xinbin Feng
2016
Source PublicationJournal of Geophysical Research: Biogeosciences
Volume121Issue:8Pages:2096-2109
Abstract
Forest ecosystems play an important role in the global cycling of mercury (Hg). In this study, we characterized the Hg cycling at a remote evergreen broadleaf (EB) forest site in southwest China (Mount Ailao). The annual Hg input via litterfall is estimated to be 75.0 +/- 24.2 mu gm(-2) yr(-1) at Mount Ailao. Such a quantity is up to 1 order of magnitude greater than those observed at remote temperate/boreal (T/B) forest sites. Production of litter biomass is found to be the most influential factor causing the high Hg input to the EB forest. Given their large areal coverage, Hg deposition through litterfall in EB forests is appropriately 9 +/- 5 Mg yr(-1) in China and 1086 +/- 775Mg yr(-1) globally. The observed wet Hg deposition at Mount Ailao is 4.9 +/- 4.5 mu gm(-2) yr(-1), falling in the lower range of those observed at 49 T/B forest sites in North America and Europe. Given the data, the Hg deposition flux through litterfall is approximately 15 times higher than the wet Hg deposition at Mount Ailao. Steady Hg accumulation in decomposing litter biomass and Hg uptake from the environment were observed during 25 months of litter decomposition. The size of the Hg pool in the organic horizon of EB forest floors is estimated to be up to 2-10 times the typical pool size in T/B forests. This study highlights the importance of EB forest ecosystems in global Hg cycling, which requires further assessment when more data become available in tropical forests.
Subject Area环境地球化学
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/6554
Collection环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
Recommended Citation
GB/T 7714
Xun Wang,Che-Jen Lin,Zhiyun Lu,et al. Enhanced accumulation and storage of mercury on subtropical evergreen forest floor: Implications on mercury budget in global forest ecosystems[J]. Journal of Geophysical Research: Biogeosciences,2016,121(8):2096-2109.
APA Xun Wang,Che-Jen Lin,Zhiyun Lu,Hui Zhang,Yiping Zhang,&Xinbin Feng.(2016).Enhanced accumulation and storage of mercury on subtropical evergreen forest floor: Implications on mercury budget in global forest ecosystems.Journal of Geophysical Research: Biogeosciences,121(8),2096-2109.
MLA Xun Wang,et al."Enhanced accumulation and storage of mercury on subtropical evergreen forest floor: Implications on mercury budget in global forest ecosystems".Journal of Geophysical Research: Biogeosciences 121.8(2016):2096-2109.
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