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Distribution of Hg in mangrove trees and its implication for Hg enrichment in the mangrove ecosystem
Zhenhua Ding;  Hao Wu;  Xinbin Feng;  Jinling Liu;  Yang Liu;  Yanting Yuan;  Ling Zhang;  Guanghui Lin;  Pan Jiayong
2011
Source PublicationApplied Geochemistry
Volume26Issue:2Pages:205-212
Abstract

The aim of this study was to evaluate Hg distribution in mangrove plants and changes of Hg content during leaf aging; the contribution of litterfall to Hg enrichment in mangrove ecosystems is also discussed. Contents of total Hg (THg) and methylmercury (MeHg) in mangrove plants and sediments were determined. Contents of THg and MeHg in the sediments were 225 ± 157 ng/g and 0.800 ± 0.600 ng/g. Concentrations of THg and MeHg in the mangrove plants were 1760 ± 1885 ng/g and 0.721 ± 0.470 ng/g (dry weight), respectively, which were much higher than those in terrestrial plants. Enrichment of THg in mangrove plants was different, following the order Rhizophra apiculata > Rhizophora stylosa > Kandelia candel > Aegiceras corniculatum Avicennia marina; while MeHg contents in mangrove plants decreased in the order of R. stylosa > K. candel > A. corniculatum > R. apiculata > A. marina. There were obvious interspecies differences, regional differences, individual differences and tissue differences between THg and MeHg contents of mangrove plants, all of which were closely related to the environmental and the physiological characteristics of mangrove plants. In juvenile leaves, mature leaves and leaf litter, THg contents ranged 55.3–1760 ng/g, 204–1800 ng/g, and 385–2130 ng/g (dry weight), respectively; MeHg contents ranged 0.17–2.39 ng/g, 0.01–1.28 ng/g, and 0.13–1.47 ng/g (dry weight), respectively. Except for A. corniculatumand Bruguier gymnorrhiza, THg content of mature leaves was always higher than that in juvenile leaves, but MeHg showed a contrasting trend. THg content of litter leaves was between that of juvenile leaves and mature leaves, while MeHg content was generally lower than that of juvenile leaves and mature leaves. In the mangrove ecosystem, Hg enrichment contributed by the litterfall decreased in the order of K. candel > A. corniculatum > A. marina.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/9492
Collection环境地球化学国家重点实验室
Affiliation1.Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, and School of Life Sciences, Xiamen University, 422# South Siming Road, Xiamen 361005, Fujian Province, China
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
3.Key Laboratory of Nuclear Resources and Environment, East China Institute of Technology, Ministry of Education, Nanchang 330013, China
Recommended Citation
GB/T 7714
Zhenhua Ding;Hao Wu;Xinbin Feng;Jinling Liu;Yang Liu;Yanting Yuan;Ling Zhang;Guanghui Lin;Pan Jiayong. Distribution of Hg in mangrove trees and its implication for Hg enrichment in the mangrove ecosystem[J]. Applied Geochemistry,2011,26(2):205-212.
APA Zhenhua Ding;Hao Wu;Xinbin Feng;Jinling Liu;Yang Liu;Yanting Yuan;Ling Zhang;Guanghui Lin;Pan Jiayong.(2011).Distribution of Hg in mangrove trees and its implication for Hg enrichment in the mangrove ecosystem.Applied Geochemistry,26(2),205-212.
MLA Zhenhua Ding;Hao Wu;Xinbin Feng;Jinling Liu;Yang Liu;Yanting Yuan;Ling Zhang;Guanghui Lin;Pan Jiayong."Distribution of Hg in mangrove trees and its implication for Hg enrichment in the mangrove ecosystem".Applied Geochemistry 26.2(2011):205-212.
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