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Physiological and isotopic signals in epilithic mosses for indicating anthropogenic sulfur on the urban-rural scale
Xue-Yan Liu; Hua-Yun Xiao; Cong-Qiang Liu
2011
发表期刊Ecological Indicators
卷号11期号:5页码:1245-1250
摘要

The strength and source of anthropogenic sulfur (S) deposition is an important area of research in both environmental and ecological disciplines. Here S concentration, stable isotope (δ34S) and photosynthetic pigments analyses were performed on epilithic mosses at Guiyang area (SW China) for investigating the distribution, origin and effect of urban-derived S at the urban–rural scale. Based on the variation of moss S, anthropogenic S was estimated to account for about 52% of total S in urban mosses and 35% in rural mosses within 30 km. The deposition of urban-derived S was biologically determined within 57 km from the urban center, but only 22% (about 24.4 × 106 kg-S annually) reached over 30 km, with 78% (about 85.9 × 106 kg-S) deposited within 30 km. δ34Smoss signatures suggested the major source of anthropogenic S was still from coal combustion, and comparable δ34Smoss values along the urban–rural transect suggested the inputs of urban-derived S into rural ecosystems. Unexpectedly, moss photosynthetic pigments did not show a decrease with S deposition, but express higher concentrations in the urban than in the rural. In contrast, correlations between moss photosynthetic pigments, and tissue nitrogen (N) and δ15N demonstrated a fertilizing effect of elevated N deposition on moss photosynthesis, which might buffer or offset the negative effect of S deposition on urban mosses. Collective evidences suggest that S% and δ34S in epilithic mosses provided useful information for determining anthropogenic S deposition on the urban–rural scale, but moss photosynthetic pigments may not be applicable for reflecting S loading under high N deposition.


关键词Biological Indicator Moss Sulfur Deposition Nitrogen Deposition City Ecosystem
学科领域环境地球化学
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/352002/6969
专题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
推荐引用方式
GB/T 7714
Xue-Yan Liu,Hua-Yun Xiao,Cong-Qiang Liu. Physiological and isotopic signals in epilithic mosses for indicating anthropogenic sulfur on the urban-rural scale[J]. Ecological Indicators,2011,11(5):1245-1250.
APA Xue-Yan Liu,Hua-Yun Xiao,&Cong-Qiang Liu.(2011).Physiological and isotopic signals in epilithic mosses for indicating anthropogenic sulfur on the urban-rural scale.Ecological Indicators,11(5),1245-1250.
MLA Xue-Yan Liu,et al."Physiological and isotopic signals in epilithic mosses for indicating anthropogenic sulfur on the urban-rural scale".Ecological Indicators 11.5(2011):1245-1250.
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