Differential responses of grasses and forbs led to marked reduction in below-ground productivity in temperate steppe following chronic N deposition

doi:10.1111/1365-2745.12468

	Differential responses of grasses and forbs led to marked reduction in below-ground productivity in temperate steppe following chronic N deposition
	Bai, Wenming 1; Guo, Dali 2; Tian, Qiuying 1; Liu, Nana 1; Cheng, Weixin 3,4; Li, Linghao 1; Zhang, Wen-Hao 1
刊名	JOURNAL OF ECOLOGY
	2015-11-01
卷号	103 期号:6 页码:1570-1579
关键词	Below-ground Productivity Grasses And Forbs Nitrogen Deposition Photosynthetic Rates Plant-soil (Below-ground) Interactions Root Traits Soil Acidification Temperate Steppe
ISSN号	0022-0477
DOI	10.1111/1365-2745.12468
英文摘要	Enhanced deposition of atmospheric nitrogen (N) has profound impacts on ecosystem processes such as above-ground productivity and community structure in grasslands across the globe. But how N deposition affects below-ground processes of grasslands is less well known. Here, we evaluated the effects of chronic N amendment at a relatively low rate (20kgha(-1)year(-1)) on root traits (root productivity, root biomass, root/shoot ratio) in Inner Mongolia steppes by rhizotron and ingrowth core and soil monolith techniques at levels of individual species, functional groups and ecosystem. For 8years, N amendment suppressed above-ground net primary production (ANPP), photosynthetic rates and root biomass of forbs, but enhanced ANPP and root biomass of grasses. This led to an overall reduction in below-ground productivity of the grassland by 24-33%, while ANPP remained unchanged. Nitrogen amendment acidified soil and subsequently increased extractable soil manganese (Mn) concentration. Nitrogen amendment increased foliar Mn concentrations in forb, but not grass species, leading to a significant inhibition of photosynthetic rates in forb species.Synthesis. These findings highlight the importance of the differentiating responses of plant functional groups to long-term N deposition and the important consequences of these responses for below-ground productivity and long-term soil C sequestration.
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000363339300020
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/122247]
专题	中国科学院沈阳应用生态研究所
通讯作者	Bai, Wenming
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Synth Res Ctr,Chinese Ecosyst Res Network, Beijing 100101, Peoples R China 3.Univ Calif Santa Cruz, Environm Studies, Santa Cruz, CA 95064 USA 4.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Bai, Wenming,Guo, Dali,Tian, Qiuying,et al. Differential responses of grasses and forbs led to marked reduction in below-ground productivity in temperate steppe following chronic N deposition[J]. JOURNAL OF ECOLOGY,2015,103(6):1570-1579.
APA	Bai, Wenming.,Guo, Dali.,Tian, Qiuying.,Liu, Nana.,Cheng, Weixin.,...&Zhang, Wen-Hao.(2015).Differential responses of grasses and forbs led to marked reduction in below-ground productivity in temperate steppe following chronic N deposition.JOURNAL OF ECOLOGY,103(6),1570-1579.
MLA	Bai, Wenming,et al."Differential responses of grasses and forbs led to marked reduction in below-ground productivity in temperate steppe following chronic N deposition".JOURNAL OF ECOLOGY 103.6(2015):1570-1579.