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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 PublicationAtmospheric Environment
Volume42Issue:21Pages:5413-5423
AbstractThe 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 NHx–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.
KeywordAtmospheric Nitrogen Deposition Biomonitoring Stable Isotope Moss Environment
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/352002/6752
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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