干旱区生态环境知识资源中心(Arid): Nutrient addition increases grassland sensitivity to droughts

Arid

DOI	10.1002/ecy.2981
	Nutrient addition increases grassland sensitivity to droughts
	Bhaaath, Siddharth; Borer, Elizabeth T.; Biederman, Lori A.; Blumenthal, Dana M.; Fay, Philip A.; Gherardi, Laureano A.; Knops, Johannes M. H.; Leakey, Andrew D. B.; Yahdjian, Laura; Seabloom, Eric W.
通讯作者	Bhaaath, S
来源期刊	ECOLOGY
ISSN	0012-9658
EISSN	1939-9170
出版年	2020
卷号	101 期号:5
英文摘要	Grasslands worldwide are expected to experience an increase in extreme events such as drought, along with simultaneous increases in mineral nutrient inputs as a result of human industrial activities. These changes are likely to interact because elevated nutrient inputs may alter plant diversity and increase the sensitivity to droughts. Dividing a system's sensitivity to drought into resistance to change during the drought and rate of recovery after the drought generates insights into different dimensions of the system's resilience in the face of drought. Here, we examine the effects of experimental nutrient fertilization and the resulting diversity loss on the resistance to and recovery from severe regional droughts. We do this at 13 North American sites spanning gradients of aridity, five annual grasslands in California, and eight perennial grasslands in the Great Plains. We measured rate of resistance as the change in annual aboveground biomass (ANPP) per unit change in growing season precipitation as conditions declined from normal to drought. We measured recovery as the change in ANPP during the postdrought period and the return to normal precipitation. Resistance and recovery did not vary across the 400-mm range of mean growing season precipitation spanned by our sites in the Great Plains. However, chronic nutrient fertilization in the Great Plains reduced drought resistance and increased drought recovery. In the California annual grasslands, arid sites had a greater recovery postdrought than mesic sites, and nutrient addition had no consistent effects on resistance or recovery. Across all study sites, we found that predrought species richness in natural grasslands was not consistently associated with rates of resistance to or recovery from the drought, in contrast to earlier findings from experimentally assembled grassland communities. Taken together, these results suggest that human-induced eutrophication may destabilize grassland primary production, but the effects of this may vary across regions and flora, especially between perennial and annual-dominated grasslands.
英文关键词	diversity loss drought fertilization grasslands Nutrient Network (NutNet) primary production
类型	Article
语种	英语
开放获取类型	Green Submitted, Bronze
收录类别	SCI-E
WOS记录号	WOS:000531817000011
WOS关键词	NET PRIMARY PRODUCTIVITY ; ECOSYSTEM STABILITY ; MEDITERRANEAN GRASSLAND ; COMMUNITY PRODUCTIVITY ; USE EFFICIENCY ; PRECIPITATION ; BIODIVERSITY ; NITROGEN ; ENRICHMENT ; RESISTANCE
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
来源机构	Arizona State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324433
作者单位	[Bhaaath, Siddharth; Borer, Elizabeth T.; Seabloom, Eric W.] Univ Minnesota, Dept Ecol Evolut & Behav, 140 Gortner Lab,1479 Gortner Ave, St Paul, MN 55108 USA; [Biederman, Lori A.] Iowa State Univ, Dept Ecol Evolut & Organismal Biol, 251 Bessey Hall,2200 Osborn Dr, Ames, IA 50011 USA; [Blumenthal, Dana M.] USDA ARS, Rangeland Resources & Syst Res Unit, 1701 Ctr Ave, Ft Collins, CO 80526 USA; [Fay, Philip A.] USDA ARS, Grassland Soil & Water Lab, 808 East Blackland Rd, Temple, TX 76502 USA; [Gherardi, Laureano A.] Arizona State Univ, Global Drylands Ctr, Sch Life Sci, 427 E Tyler Mall,Life Sci Bldg A, Tempe, AZ 85287 USA; [Knops, Johannes M. H.] Xian Jiaotong Liverpool Univ, Dept Hlth & Environm Sci, HSGO6 ES341,8 Chongwen Rd, Suzhou 215123, Jiangsu, Peoples R China; [Leakey, Andrew D. B.] Univ Illinois, Inst Genom Biol 1402, Dept Plant Biol, 1206 W Gregory Dr,M-C 195, Urbana, IL 61801 USA; [Yahdjian, Laura] Univ Buenos Aires, Catedra Ecol, Inst Invest Fisiol & Ecol Vinculadas Agr IFEVA, CONICET,Fac Agron,...
推荐引用方式 GB/T 7714	Bhaaath, Siddharth,Borer, Elizabeth T.,Biederman, Lori A.,et al. Nutrient addition increases grassland sensitivity to droughts[J]. Arizona State University,2020,101(5).
APA	Bhaaath, Siddharth.,Borer, Elizabeth T..,Biederman, Lori A..,Blumenthal, Dana M..,Fay, Philip A..,...&Seabloom, Eric W..(2020).Nutrient addition increases grassland sensitivity to droughts.ECOLOGY,101(5).
MLA	Bhaaath, Siddharth,et al."Nutrient addition increases grassland sensitivity to droughts".ECOLOGY 101.5(2020).