title: Tissue S/N ratios and stable isotopes (delta(34)S and delta(15)N) of epilithic mosses (Haplocladium microphyllum) for showing air pollution in urban cities in Southern China.
abstract: In urban cities in Southern China, the tissue S/N ratios of epilithic mosses (Haplocladium microphyllum), varied widely from 0.11 to 0.19, are strongly related to some atmospheric chemical parameters (e.g. rainwater SO(4)(2-)/NH(4)(+) ratios, each people SO(2) emission). If tissue S/N ratios in the healthy moss species tend to maintain a constant ratio of 0.15 in unpolluted area, our study cities can be divided into two classes: class I (S/N > 0.15, S excess) and class II (S/N < 0.15, N excess), possibly indicative of stronger industrial activity and higher density of population, respectively. Mosses in all these cities obtained S and N from rainwater at a similar ratio. Sulphur and N isotope ratios in mosses are found significantly linearly correlated with local coal delta(34)S and NH(4)(+)-N wet deposition, respectively, indicating that local coal and animal NH(3) are the major atmospheric S and N sources.
authors: State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, No. 46, Guanshui Road, Guiyang 550002, China. xiaohuayun@vip.skleg.cn
authors: Hua-Yun
authors: HY
authors: Xiao
authors: Cong-Guo
authors: CG
authors: Tang
authors: Hong-Wei
authors: HW
authors: Xiao
authors: Yan-Li
authors: YL
authors: Wang
authors: Xue-Yan
authors: XY
authors: Liu
authors: Cong-Qiang
authors: CQ
authors: Liu
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution; D044002:Bryophyta / Q000737:chemistry*; D002681:China; D004784:Environmental Monitoring; D009587:Nitrogen Isotopes / Q000032:analysis; D013460:Sulfur Isotopes / Q000032:analysis; D014504:Urban Health
chemical_list: D000393:Air Pollutants; D009587:Nitrogen Isotopes; D013460:Sulfur Isotopes