Stable carbon and nitrogen isotopes of the moss Haplocladium microphyllum in an urban and a background area (SW China):The role of environmental conditions and atmospheric nitrogen deposition

	Stable carbon and nitrogen isotopes of the moss Haplocladium microphyllum in an urban and a background area (SW China):The role of environmental conditions and atmospheric nitrogen deposition
	Xue-Yan Liu; Hua-Yun Xiao; Cong-Qiang Liu; You-Yi Li; Hong-Wei Xiao
	2008
Source Publication	Atmospheric Environment
Volume	42 Issue:21 Pages:5413-5423
Abstract	The C and N concentrations and stable isotopes in new and old tissues of the mossHaplocladium microphyllum were investigated at Guiyang and Gongga Mountain in SW China, aiming at revealing responses of these parameters to different environmental conditions and N deposition, elucidating the effect of N deposition on C fixation and signal variations during senescence. Atmospheric N deposition could be quantified by N in new tissues, showing a level of 30.18 kg N ha⁻¹ yr⁻¹ at Guiyang and 8.46 kg N ha⁻¹ yr⁻¹ at Mt. Gongga, old tissues presented lower C and N concentrations than new tissues, but there was no significant difference between N of new and old tissues at background area with lower N deposition, and the positive effect of N supply on C fixation was observed only for urban mosses under higher N deposition. More negative δ¹³C mainly indicated the influences of anthropogenic CO₂ sources on urban mosses, and higher δ¹³C of mosses at background area was also related to higher altitude and lower temperature. More negative δ¹⁵N of mosses mainly indicated N deposition at Guiyang was dominated by NH_x–N from city wastes and sewage, while δ¹⁵N of mosses at Mt. Gongga mainly indicated little anthropogenic N pollution in background area. Besides, no significant isotopic difference was found between new and old tissues in both areas, suggesting no isotopic effect occurred during the senescence of H. microphyllum.
Keyword	Atmospheric Nitrogen Deposition Biomonitoring Stable Isotope Moss Environment
Subject Area	环境地球化学
Indexed By	SCI
Language	英语
Document Type	期刊论文
Identifier	http://ir.gyig.ac.cn/handle/352002/6752
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	Xue-Yan Liu,Hua-Yun Xiao,Cong-Qiang Liu,et al. Stable carbon and nitrogen isotopes of the moss Haplocladium microphyllum in an urban and a background area (SW China):The role of environmental conditions and atmospheric nitrogen deposition[J]. Atmospheric Environment,2008,42(21):5413-5423.
APA	Xue-Yan Liu,Hua-Yun Xiao,Cong-Qiang Liu,You-Yi Li,&Hong-Wei Xiao.(2008).Stable carbon and nitrogen isotopes of the moss Haplocladium microphyllum in an urban and a background area (SW China):The role of environmental conditions and atmospheric nitrogen deposition.Atmospheric Environment,42(21),5413-5423.
MLA	Xue-Yan Liu,et al."Stable carbon and nitrogen isotopes of the moss Haplocladium microphyllum in an urban and a background area (SW China):The role of environmental conditions and atmospheric nitrogen deposition".Atmospheric Environment 42.21(2008):5413-5423.

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