石生苔藓氮含量和氮同位素指示贵阳地区大气氮沉降的空间变化和来源
Nitrogen Concentration and Nitrogen Isotope in Epilithic Mosses for Indicating the Spatial Variation and Sources of Atmospheric Nitrogen Deposition at Guiyang Area
查看参考文献29篇
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文摘
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对贵阳市区到农村地区4个方向的石生苔藓氮含量和氮同位素组成进行了对比分析.苔藓氮含量变化范围为0.85%～2.97%,并从市区(2.24%±0.32%)往外明显降低(1.27%±0.13%),表明贵阳市区氮沉降最高、往外逐渐降低,但在较远的农村地区(> 25 km)苔藓氮含量出现回升(平均1.33%～1.75%),反映了农村地区大气氮输入有所增加.苔藓氮同位素均为负值(-2.50‰～-1.39‰),并从市区到农村地区明显升高.市区苔藓较负的氮同位素比值(平均-8.87‰～-8.59%o)主要指示了城市排泄物和污水所释放的氨源贡献,而郊区和农村地区苔藓较高的氮同位素信号(平均-3.83‰～-2.48‰)主要反映了农业氨源的影响,苔藓氮含量回升可能与农业活动增强有关.此外,贵阳地区苔藓氮同位素的分布特征与受氧化态氮源控制的地区苔藓氮同位素变化相反,因而,贵阳地区大气氮沉降以铵(NHx)沉降为主,该结论有助于更加准确地认识城市地区大气氮沉降的来源和变化. |
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其他语种文摘
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Tissue N concentration and(δ~(15)N) signature in epilithic mosses were investigated along 4 directions from urban area to rural area at Guiyang city.Mosses N concentration ranged from 0.85% to 2.97% and showed significant decrease from urban area(2.24%±0.32%) to suburb(1.27%±0.13%),reflecting the level of atmospheric N deposition decreased away from urban.While slightly higher tissue N re-emerged at rural area beyond 25km(mean=1.33%-1.75%),suggesting increased N deposition occurred in the rural area.Mosses(δ~(15)N) values varied from(-12.50‰) to(-1.39‰) characterized with getting less negative from urban to rural area.More negative(δ~(15)N) signatures of urban mosses(mean=(-8.87‰)-(-8.59‰)) mainly indicated the extensive NH_3 sources released from excretory wastes and sewage,while mosses growing at farther suburb or rural area had less depleted(δ~(15)N) values(mean=(-3.83‰)-(-2.48‰)),indicating the large sources of agricultural NH_3 emission connected with fertilizer application.Moreover,the pattern of mosses(δ~(15)N) variation in this study was opposite to areas where N deposition was dominated by oxidized form N(NO_x) with generally positive mosses(δ~(15)N).Accordingly,we concluded that reduced NH_x was the dominant N form in atmospheric deposition at Guiyang area,which would be of great value for understanding the spatial variation and sources of atmospheric N deposition. |
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来源
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环境科学
,2008,29(7):1785-1790 【核心库】
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关键词
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大气氮沉降
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苔藓
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氮同位素
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氨
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来源
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地址
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1.
中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002
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河北师范大学生命科学学院, 河北, 石家庄, 050016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0250-3301 |
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学科
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环境科学基础理论 |
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基金
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国家973计划
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国家自然科学基金
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文献收藏号
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CSCD:3335237
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参考文献 共
29
共2页
|
|
1.
Ammann M. Estimating the uptake of traffic-derived NO2from 15 N abundance in Norway spruce needles.
Oecologia,1999,118:124-131
|
CSCD被引
19
次
|
|
|
|
|
2.
Bragazza L. Nitrogen concentration andδ15N signature of ombrotrophic Sphagnum mosses at different N deposition levels in Europe.
Global Change Biology,2005,11:106-114
|
CSCD被引
13
次
|
|
|
|
|
3.
Carslaw D C,N. Detecting and characterizing small changes in urban nitrogen dioxide concentrations.
Atmospheric Environment,2007,41(22):4723-4733
|
CSCD被引
1
次
|
|
|
|
|
4.
Dawson T E. Stable isotopes in plant ecology.
Annual Review of Ecology and Systematics,2002,33:507-519
|
CSCD被引
153
次
|
|
|
|
|
5.
Freyer H D. Seasonal trends of NH+4 and NO-3 nitrogen isotope composition in rain collected at Julich Germany.
Tellus,1978,30:83-92
|
CSCD被引
23
次
|
|
|
|
|
6.
Galloway J N. Nitrogen mobilization in the United States of America and the People's Republic of China.
Atmospheric Environment,1996,30:1551-1561
|
CSCD被引
15
次
|
|
|
|
|
7.
Galloway J N. Reactive nitrogen and the world:200 years of change.
AMBIO,2002,31:64-71
|
CSCD被引
215
次
|
|
|
|
|
8.
Heaton THE. Potential canopy influences on the isotopic composition of nitrogen and sulphur in atmospheric deposition.
Oecologia,1997,109:600-607
|
CSCD被引
18
次
|
|
|
|
|
9.
Jauhiainen J. Nutrient concentration in Sphagna at increased N-deposition rates and raised atmospheric C02 concentrations.
Plant Ecology,1998,138(2):149-160
|
CSCD被引
6
次
|
|
|
|
|
10.
Krupa S V. Effects of atmospheric ammonia(NH3)on terrestrial vegetation:a review.
Environmental Pollution,2003,124:179-221
|
CSCD被引
86
次
|
|
|
|
|
11.
Liu X Y. δ15C andδ15N of moss(Haplocladium microphyllum(Hedw )Broth)for indicating environment variations and canopy retention on atmospheric nitrogen deposition.
Atmospheric environment,2007,41(23):4897-4907
|
CSCD被引
12
次
|
|
|
|
|
12.
Moore H. The isotopic composition of ammonia nitrogen dioxide and nitrate in the atmosphere.
Atmospheric Environment,1977,11:1239-1243
|
CSCD被引
16
次
|
|
|
|
|
13.
Pearson J. Traffic exposure increases natural 15 N and heavy metal concentrations in mosses.
New Phytologist,2000,147:317-326
|
CSCD被引
14
次
|
|
|
|
|
14.
Pitcairn C E R. Bioindicators of enhanced nitrogen deposition.
Environmental Pollution,2003,26:353-361
|
CSCD被引
9
次
|
|
|
|
|
15.
Pitcairn CER. Foliar nitrogen as an indicator of nitrogen deposition and critical loads exceedence on a European scale.
Water,2001,130:1037-1042
|
CSCD被引
1
次
|
|
|
|
|
16.
Solga A. Nitrogen content 15N natural abundance and biomass of the two pleurocarpous mosses Pleurozium schreberi(Brid)Mitt and Scleropodium purum(Hedw )Limpr In relation to atmospheric nitrogen deposition.
Environmental Pollution,2005,134:465-473
|
CSCD被引
13
次
|
|
|
|
|
17.
Xiao H Y. Sources of nitrogen and sulfur in wet deposition at Guiyang Southwest China.
Atmospheric Environment,2002,36:5121-5130
|
CSCD被引
54
次
|
|
|
|
|
18.
Xiao H Y. Chemical characteristics of water-soluble components in TSP over Guiyang SW China 2003.
Atmospheric Environment,2004,38:6297-6306
|
CSCD被引
58
次
|
|
|
|
|
19.
Yeatman S G. Comparisons of aerosol nitrogen isotopic composition at two polluted coastal sites.
Atmospheric Environment,2001,35:1307-1320
|
CSCD被引
11
次
|
|
|
|
|
20.
Zhao D. Estimation of anthropogenic ammonia emissions in Asia.
Atmospheric Environment,1994,28:689-694
|
CSCD被引
8
次
|
|
|
|
|
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