Dynamic patterns of nitrogen: Phosphorus ratios in forest soils of China under changing environment

doi:10.1002/2016JG003352

	Dynamic patterns of nitrogen: Phosphorus ratios in forest soils of China under changing environment
	Chen, Leiyi ; Li, Pin 1; Yang, Yuanhe
	2016
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
卷号	121 期号:9 页码:2410-2421
摘要	Knowledge of nitrogen (N) and phosphorus (P) stoichiometry is essential for understanding biogeochemical cycle and ecosystem functioning. However, large-scale patterns in soil stoichiometry are not yet fully understood along environmental gradients nor over the temporal scale. Using a comprehensive data set and artificial neural network approach, we evaluated spatial and temporal patterns in topsoil N and P concentrations and N:P ratio across China's forests. Our results revealed that soil weathering stage, climatic factors (i.e., temperature and precipitation), and forest types jointly explained approximately 34.1% and 30.4% of spatial variations in soil N and P, respectively. By contrast, only precipitation could explain the variation in N:P ratio, with soil N:P ratio exhibiting a trend of increase along the precipitation gradient. The observed spatial patterns in soil N:P ratio were consistent with previous findings derived from plants and microbes, suggesting that variation in precipitation may induce the imbalance of N:P stoichiometry in forest ecosystems. Our results also indicated that topsoil N:P ratios exhibited a significant increase from the 1980s to 2000s. However, the associations of N:P dynamics with a single element largely depended on forest type. In evergreen forests, soil N:P dynamics were caused by increasing N and decreasing P. Conversely, N:P changes in deciduous broadleaf forests were triggered only by soil N accumulation. Overall, these results demonstrated a stoichiometric shift in soil N:P both spatially and temporally, implying that nutrient imbalance between soil N and P may be accelerated under global change scenarios.
关键词	artificial neural network forest ecosystems nitrogen-phosphorus interactions nitrogen:phosphorus ratio soil inventory stoichiometric shift
学科领域	Environmental Sciences ; Geosciences, Multidisciplinary
DOI	10.1002/2016JG003352
收录类别	SCI
语种	英语
WOS关键词	N-P STOICHIOMETRY ; TERRESTRIAL ECOSYSTEMS ; NUTRIENT LIMITATION ; GLOBAL PATTERNS ; BIOMASS CARBON ; LEAF NITROGEN ; RAIN-FOREST ; FIXATION ; TEMPERATURE ; MECHANISMS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000385712800007
出版者	AMER GEOPHYSICAL UNION
文献子类	Article
出版地	WASHINGTON
EISSN	2169-8961
资助机构	National Basic Research Program of ChinaNational Basic Research Program of China [2014CB954001, 2015CB954201] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31322011, 41371213, 31400364] ; Chinese Academy of Sciences-Peking University Pioneer Collaboration Team ; Thousand Young Talents ProgramChinese Academy of Sciences ; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2014T70138]
作者邮箱	yhyang@ibcas.ac.cn
引用统计	被引频次：46[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/25368
专题	中科院植物分子生理学重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Chen, Leiyi,Li, Pin,Yang, Yuanhe. Dynamic patterns of nitrogen: Phosphorus ratios in forest soils of China under changing environment[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2016,121(9):2410-2421.
APA	Chen, Leiyi,Li, Pin,&Yang, Yuanhe.(2016).Dynamic patterns of nitrogen: Phosphorus ratios in forest soils of China under changing environment.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,121(9),2410-2421.
MLA	Chen, Leiyi,et al."Dynamic patterns of nitrogen: Phosphorus ratios in forest soils of China under changing environment".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 121.9(2016):2410-2421.

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