Plant traits and soil fertility mediate productivity losses under extreme drought in C-3 grasslands

doi:10.1002/ecy.3465

KIB OpenIR

	Plant traits and soil fertility mediate productivity losses under extreme drought in C-3 grasslands
	Luo,Wentao ; Griffin-Nolan,Robert J.; Ma,Wang ; Liu,Bo ; Zuo,Xiaoan ; Xu,Chong ; Yu,Qiang ; Luo,Yahuang ; Mariotte,Pierre ; Smith,Melinda D.; Collins,Scott L.; Knapp,Alan K.; Wang,Zhengwen ; Han,Xingguo
	2021
发表期刊	ECOLOGY
ISSN	0012-9658
卷号	102 期号:10 页码:e03465
摘要	Extreme drought decreases aboveground net primary production (ANPP) in most grasslands, but the magnitude of ANPP reductions varies especially in C-3-dominated grasslands. Because the mechanisms underlying such differential ecosystem responses to drought are not well resolved, we experimentally imposed an extreme 4-yr drought (2015-2018) in two C-3 grasslands that differed in aridity. These sites had similar annual precipitation and dominant grass species (Leymus chinensis) but different annual temperatures and thus water availability. Drought treatments differentially affected these two semiarid grasslands, with ANPP of the drier site reduced more than at the wetter site. Structural equation modeling revealed that community-weighted means for some traits modified relationships between soil moisture and ANPP, often due to intraspecific variation. Specifically, drought reduced community mean plant height at both sites, resulting in a reduction in ANPP beyond that attributable to reduced soil moisture alone. Higher community mean leaf carbon content enhanced the negative effects of drought on ANPP at the drier site, and ANPP-soil-moisture relationships were influenced by soil C:N ratio at the wetter site. Importantly, neither species richness nor functional dispersion were significantly correlated with ANPP at either site. Overall, as expected, soil moisture was a dominant, direct driver of ANPP response to drought, but differential sensitivity to drought in these two grasslands was also related to soil fertility and plant traits.
关键词	community-weighted traits drought functional dispersion plant traits productivity soil fertility species richness FUNCTIONAL DIVERSITY BIODIVERSITY RESPONSES SELECTION
DOI	10.1002/ecy.3465
WOS记录号	WOS:000686031300001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73106
专题	中国科学院昆明植物研究所
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Erguna Forest Steppe Ecotone Res Stn, Shenyang 110016, Peoples R China 2.Griffin-Nolan, Robert J.] Syracuse Univ, Dept Biol, Syracuse, NY 13244 USA 3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Urat Desert Grassland Res Stn, Lanzhou 730000, Peoples R China 4.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Peoples R China 5.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Yunnan, Peoples R China 6.Agroscope, Grazing Syst, Route Duillier 50, CH-1260 Nyon, Switzerland 7.Smith, Melinda D.; Knapp, Alan K.] Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA 8.Smith, Melinda D.] Colorado State Univ, Grad Degree Program Ecol, Ft Collins, CO 80523 USA 9.Collins, Scott L.] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA 10.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 11.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Luo,Wentao,Griffin-Nolan,Robert J.,Ma,Wang,et al. Plant traits and soil fertility mediate productivity losses under extreme drought in C-3 grasslands[J]. ECOLOGY,2021,102(10):e03465.
APA	Luo,Wentao.,Griffin-Nolan,Robert J..,Ma,Wang.,Liu,Bo.,Zuo,Xiaoan.,...&Han,Xingguo.(2021).Plant traits and soil fertility mediate productivity losses under extreme drought in C-3 grasslands.ECOLOGY,102(10),e03465.
MLA	Luo,Wentao,et al."Plant traits and soil fertility mediate productivity losses under extreme drought in C-3 grasslands".ECOLOGY 102.10(2021):e03465.