Effects of extreme drought on plant nutrient uptake and resorption in rhizomatous vs bunchgrass-dominated grasslands

doi:10.1007/s00442-018-4232-1

	Effects of extreme drought on plant nutrient uptake and resorption in rhizomatous vs bunchgrass-dominated grasslands
	Luo, Wentao ; Xu, Chong 1; Ma, Wang ; Yue, Xiyuan 2; Liang, Xiaosa ; Zuo, Xiaoan 2; Knapp, Alan K.; Smith, Melinda D.; Sardans, Jordi 5,6; Dijkstra, Feike A.; Peuelas, Josep 5,6; Bai, Yongfei8 ; Wang, Zhengwen ; Yu, Qiang 1; Han, Xingguo8,9
	2018
发表期刊	OECOLOGIA
ISSN	0029-8549
卷号	188 期号:2 页码:633-643
摘要	Both the dominance and the mass ratio hypotheses predict that plant internal nutrient cycling in ecosystems is determined by the dominant species within plant communities. We tested this hypothesis under conditions of extreme drought by assessing plant nutrient (N, P and K) uptake and resorption in response to experimentally imposed precipitation reductions in two semiarid grasslands of northern China. These two communities shared similar environmental conditions, but had different dominant species-one was dominated by a rhizomatous grass (Leymus chinensis) and the other by a bunchgrass (Stipa grandis). Results showed that responses of N to drought differed between the two communities with drought decreasing green leaf N concentration and resorption in the community dominated by the rhizomatous grass, but not in the bunchgrass-dominated community. In contrast, negative effects of drought on green leaf P and K concentrations and their resorption efficiencies were consistent across the two communities. Additionally, in each community, the effects of extreme drought on soil N, P and K supply did not change synchronously with that on green leaf N, P and K concentrations, and senesced leaf N, P and K concentrations showed no response to extreme drought. Consistent with the dominance/mass ratio hypothesis, our findings suggest that differences in dominant species and their growth form (i.e., rhizomatous vs bunch grass) play an important nutrient-specific role in mediating plant internal nutrient cycling across communities within a single region.
关键词	Dominance/mass ratio hypothesis Dominant species Extreme drought Nutrient cycling
学科领域	Ecology
DOI	10.1007/s00442-018-4232-1
收录类别	SCI
语种	英语
WOS关键词	CHANGING CLIMATIC CONDITIONS ; XILIN RIVER-BASIN ; LEYMUS-CHINENSIS ; COLORADO PLATEAU ; INNER-MONGOLIA ; STIPA-GRANDIS ; GLOBAL CHANGE ; SOIL-WATER ; NITROGEN ; ECOSYSTEM
WOS记录号	WOS:000445426400026
出版者	SPRINGER
文献子类	Article
出版地	NEW YORK
EISSN	1432-1939
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41320104002, 41600302] ; National Key Research and Development Program of China [2016YFC0500601, 2016YFC0500602] ; US National Science Foundation Macrosystems Biology program ; European Research Council Synergy grantEuropean Research Council (ERC) [ERC-SyG-2013-610028 IMBALANCE-P] ; Spanish GovernmentSpanish GovernmentEuropean Commission [CGL2013-48074-P] ; Catalan Government [SGR 2014-274]
作者邮箱	wangzw@iae.ac.cn ; yuqiang@caas.cn
引用统计	被引频次：40[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/2S10CLM1/20478
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, Erguna Forest Steppe Ecotone Res Stn, Shenyang 110164, Liaoning, Peoples R China 2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 10004, Peoples R China 3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Urat Desert Grassland Res Stn, Lanzhou 730000, Gansu, Peoples R China 4.Knapp, Alan K.; Smith, Melinda D.] Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA 5.Knapp, Alan K.; Smith, Melinda D.] Colorado State Univ, Grad Degree Program Ecol, Ft Collins, CO 80523 USA 6.UAB, CSIC, CREAF, Global Ecol Unit, Bellaterra 08193, Catalonia, Spain 7.CREAF, Cerdanyola Del Valles 08193, Catalonia, Spain 8.Dijkstra, Feike A.] Univ Sydney, Sch Life & Environm Sci, Sydney Inst Agr, Sydney, NSW 2006, Australia 9.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 10.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Luo, Wentao,Xu, Chong,Ma, Wang,et al. Effects of extreme drought on plant nutrient uptake and resorption in rhizomatous vs bunchgrass-dominated grasslands[J]. OECOLOGIA,2018,188(2):633-643.
APA	Luo, Wentao.,Xu, Chong.,Ma, Wang.,Yue, Xiyuan.,Liang, Xiaosa.,...&Han, Xingguo.(2018).Effects of extreme drought on plant nutrient uptake and resorption in rhizomatous vs bunchgrass-dominated grasslands.OECOLOGIA,188(2),633-643.
MLA	Luo, Wentao,et al."Effects of extreme drought on plant nutrient uptake and resorption in rhizomatous vs bunchgrass-dominated grasslands".OECOLOGIA 188.2(2018):633-643.

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