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	Nitrogen deposition and its spatial pattern in main forest ecosystems along north-south transect of eastern China
	Zhan X. Y. ; Yu G. R. ; He N. P. ; Fang H. J. ; Jia B. R. ; Zhou M. ; Wang C. K. ; Zhang J. H. ; Zhao G. D. ; Wang S. L. ; Liu Y. F. ; Yan J. H.
	2014
关键词	forest ecosystem nitrogen deposition NH4+-N NO3-N eastern China atmospheric deposition species richness european forests coastal waters critical loads united-states nitrate cycle saturation grasslands
英文摘要	A continuous three-year observation (from May 2008 to April 2011) was conducted to characterize the spatial variation of dissolved inorganic nitrogen (DIN) deposition at eight main forest ecosystems along the north-south transect of eastern China (NSTEC). The results show that both throughfall DIN deposition and bulk DIN deposition increase from north to south along the NSTEC. Throughfall DIN deposition varies greatly from 2.7 kg N/(ha center dot yr) to 33.0 kg N/(ha center dot yr), with an average of 10.6 kg N/(ha center dot yr), and bulk DIN deposition ranges from 4.1 kg N/(ha center dot yr) to 25.4 kg N/(ha center dot yr), with an average of 9.8 kg N/(ha center dot yr). NH (4) (+) -N is the dominant form of DIN deposition at most sampling sites. Additionally, the spatial variation of DIN deposition is controlled mainly by precipitation. Moreover, in the northern part of the NSTEC, bulk DIN deposition is 17% higher than throughfall DIN deposition, whereas the trend is opposite in the southern part of the NSTEC. The results demonstrate that DIN deposition would likely threaten the forest ecosystems along the NSTEC, compared with the critical loads (CL) of N deposition, and DIN deposition in this region is mostly controlled by agricultural activities rather than industrial activities or transportation.
出处	Chinese Geographical Science
卷	24
期	2
页	137-146
收录类别	SCI
语种	英语
ISSN号	1002-0063
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29422]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhan X. Y.,Yu G. R.,He N. P.,et al. Nitrogen deposition and its spatial pattern in main forest ecosystems along north-south transect of eastern China. 2014.

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