Convergent responses of nitrogen and phosphorus resorption to nitrogen inputs in a semiarid grassland

doi:10.1111/gcb.12235

	Convergent responses of nitrogen and phosphorus resorption to nitrogen inputs in a semiarid grassland
	Lu, Xiao-Tao ; Reed, Sasha 1; Yu, Qiang ; He, Nian-Peng ; Wang, Zheng-Wen ; Han, Xing-Guo
	2013
发表期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
卷号	19 期号:9 页码:2775-2784
摘要	Human activities have significantly altered nitrogen (N) availability in most terrestrial ecosystems, with consequences for community composition and ecosystem functioning. Although studies of how changes in N availability affect biodiversity and community composition are relatively common, much less remains known about the effects of N inputs on the coupled biogeochemical cycling of N and phosphorus (P), and still fewer data exist regarding how increased N inputs affect the internal cycling of these two elements in plants. Nutrient resorption is an important driver of plant nutrient economies and of the quality of litter plants produce. Accordingly, resorption patterns have marked ecological implications for plant population and community fitness, as well as for ecosystem nutrient cycling. In a semiarid grassland in northern China, we studied the effects of a wide range of N inputs on foliar nutrient resorption of two dominant grasses, Leymus chinensis and Stipa grandis. After 4years of treatments, N and P availability in soil and N and P concentrations in green and senesced grass leaves increased with increasing rates of N addition. Foliar N and P resorption significantly decreased along the N addition gradient, implying a resorption-mediated, positive plant-soil feedback induced by N inputs. Furthermore, N:P resorption ratios were negatively correlated with the rates of N addition, indicating the sensitivity of plant N and P stoichiometry to N inputs. Taken together, the results demonstrate that N additions accelerate ecosystem uptake and turnover of both N and P in the temperate steppe and that N and P cycles are coupled in dynamic ways. The convergence of N and P resorption in response to N inputs emphasizes the importance of nutrient resorption as a pathway by which plants and ecosystems adjust in the face of increasing N availability.
关键词	ecological stoichiometry foliar nutrient concentration intraspecific variation nitrogen addition nutrient resorption plant-soil feedback resorption ratio temperate steppe
学科领域	Biodiversity Conservation ; Ecology ; Environmental Sciences
DOI	10.1111/gcb.12235
收录类别	SCI
语种	英语
WOS关键词	NUTRIENT RESORPTION ; INNER-MONGOLIA ; LIMITATION ; DEPOSITION ; STOICHIOMETRY ; AVAILABILITY ; WATER ; LEAF ; DECOMPOSITION ; EFFICIENCIES
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000322758000016
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2486
资助机构	National Nature Science Foundation of China(National Natural Science Foundation of China (NSFC)) ; State Key Laboratory of Vegetation and Environmental Change ; State Key Laboratory of Forest and Soil Ecology
作者邮箱	Reed, Sasha C/ABE-9476-2020 ; Yu, Qiang/E-2097-2011 ; Lu (ü), Xiao-Tao/B-3905-2008 ; Han, Xingguo/K-7552-2016 ; Wang, Zhengwen/A-8292-2011
引用统计	被引频次：171[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/2S10CLM1/28058
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110164, Peoples R China 2.US Geol Survey, Southwest Biol Sci Ctr, Moab, UT 84532 USA 3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Lu, Xiao-Tao,Reed, Sasha,Yu, Qiang,et al. Convergent responses of nitrogen and phosphorus resorption to nitrogen inputs in a semiarid grassland[J]. GLOBAL CHANGE BIOLOGY,2013,19(9):2775-2784.
APA	Lu, Xiao-Tao,Reed, Sasha,Yu, Qiang,He, Nian-Peng,Wang, Zheng-Wen,&Han, Xing-Guo.(2013).Convergent responses of nitrogen and phosphorus resorption to nitrogen inputs in a semiarid grassland.GLOBAL CHANGE BIOLOGY,19(9),2775-2784.
MLA	Lu, Xiao-Tao,et al."Convergent responses of nitrogen and phosphorus resorption to nitrogen inputs in a semiarid grassland".GLOBAL CHANGE BIOLOGY 19.9(2013):2775-2784.

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