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; Guo, Dali 1; Tian, Qiuying ; Liu, Nana ; Cheng, Weixin 2,3; Li, Linghao; Zhang, Wen-Hao
	2015
发表期刊	JOURNAL OF ECOLOGY
ISSN	0022-0477
卷号	103 期号:6 页码:1570-1579
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.
关键词	below-ground productivity grasses and forbs nitrogen deposition photosynthetic rates plant-soil (below-ground) interactions root traits soil acidification temperate steppe
学科领域	Plant Sciences ; Ecology
DOI	10.1111/1365-2745.12468
收录类别	SCI
语种	英语
WOS关键词	NITROGEN DEPOSITION ; SPECIES RICHNESS ; GLOBAL PERSPECTIVE ; REGIONAL TRENDS ; SOIL CHEMISTRY ; BIODIVERSITY ; GRASSLANDS ; ENRICHMENT ; DIVERSITY ; ACIDIFICATION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000363339300020
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2745
资助机构	State Key Basic Research Development Program of China [2013CB956304] ; National Natural Science Foundation of China [31370468, 31130008]
作者邮箱	bwming@ibcas.ac.cn ; whzhang@ibcas.ac.cn
作品OA属性	Green Published, Bronze
引用统计	被引频次：62[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/2S10CLM1/25636
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 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.

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