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

doi:10.1007/s00442-018-4232-1

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	Effects of extreme drought on plant nutrient uptake and resorption in rhizomatous vs bunchgrass-dominated grasslands
	Luo, Wentao ; Xu, Chong 8; Ma, Wang ; Yue, Xiyuan 5; Liang, Xiaosa ; Zuo, Xiaoan 5; Knapp, Alan K.; Smith, Melinda D.; Sardans, Jordi 4,9; Dijkstra, Feike A.
刊名	OECOLOGIA
	2018
卷号	188 期号:2 页码:633-643
关键词	Dominance/mass ratio hypothesis Dominant species Extreme drought Nutrient cycling
ISSN号	0029-8549
DOI	10.1007/s00442-018-4232-1
文献子类	Article
英文摘要	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.
学科主题	Ecology
电子版国际标准刊号	1432-1939
出版地	NEW YORK
WOS关键词	CHANGING CLIMATIC CONDITIONS ; XILIN RIVER-BASIN ; LEYMUS-CHINENSIS ; COLORADO PLATEAU ; INNER-MONGOLIA ; STIPA-GRANDIS ; GLOBAL CHANGE ; SOIL-WATER ; NITROGEN ; ECOSYSTEM
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000445426400026
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]
内容类型	期刊论文
源URL	[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.Knapp, Alan K.; Smith, Melinda D.] Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 4.UAB, CSIC, CREAF, Global Ecol Unit, Bellaterra 08193, Catalonia, Spain 5.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 10004, Peoples R China 6.CREAF, Cerdanyola Del Valles 08193, Catalonia, Spain 7.Dijkstra, Feike A.] Univ Sydney, Sch Life & Environm Sci, Sydney Inst Agr, Sydney, NSW 2006, Australia 8.Chinese Acad Sci, Inst Appl Ecol, Erguna Forest Steppe Ecotone Res Stn, Shenyang 110164, Liaoning, Peoples R China 9.Knapp, Alan K.; Smith, Melinda D.] Colorado State Univ, Grad Degree Program Ecol, Ft Collins, CO 80523 USA 10.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Urat Desert Grassland Res Stn, Lanzhou 730000, Gansu, 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.