A novel soil manganese mechanism drives plant species loss with increased nitrogen deposition in a temperate steppe

doi:10.1890/15-0917.1

	A novel soil manganese mechanism drives plant species loss with increased nitrogen deposition in a temperate steppe
	Liu, Nana 2,4; Tian, Qiuying 2,3; Bai, Wenming 2; Li, Linghao 2; Chen, Jiquan 5,6; Reich, Peter B.7,8; Yu, Qiang 9,10,11; Guo, Dali 12; Smith, Melinda D.10,11; Knapp, Alan K.10
刊名	ECOLOGY
	2016
卷号	97 期号:1 页码:65-74
关键词	Artemisia Frigida Forbs And Grasses Inner Mongolia China Manganese Mobilization And Acquisition Nitrogen Deposition Photosynthesis Soil Acidification Species Richness Stipa Krylovii Temperate Steppe
ISSN号	0012-9658
DOI	10.1890/15-0917.1
英文摘要	Loss of plant diversity with increased anthropogenic nitrogen (N) deposition in grasslands has occurred globally. In most cases, competitive exclusion driven by preemption of light or space is invoked as a key mechanism. Here, we provide evidence from a 9-yr N-addition experiment for an alternative mechanism: differential sensitivity of forbs and grasses to increased soil manganese (Mn) levels. In Inner Mongolia steppes, increasing the N supply shifted plant community composition from grass-forb codominance (primarily Stipa krylovii and Artemisia frigida, respectively) to exclusive dominance by grass, with associated declines in overall species richness. Reduced abundance of forbs was linked to soil acidification that increased mobilization of soil Mn, with a 10-fold greater accumulation of Mn in forbs than in grasses. The enhanced accumulation of Mn in forbs was correlated with reduced photosynthetic rates and growth, and is consistent with the loss of forb species. Differential accumulation of Mn between forbs and grasses can be linked to fundamental differences between dicots and monocots in the biochemical pathways regulating metal transport. These findings provide a mechanistic explanation for N-induced species loss in temperate grasslands by linking metal mobilization in soil to differential metal acquisition and impacts on key functional groups in these ecosystems.
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000369852600009
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/122461]
专题	中国科学院沈阳应用生态研究所
通讯作者	Zhang, Wen-Hao
作者单位	1.Univ Calif Santa Cruz, Environm Studies, Santa Cruz, CA 95064 USA 2.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China 3.Chinese Acad Sci, Res Network Global Change Biol, Beijing Inst Life Sci, Beijing 100101, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Int Ctr Ecol Meteorol & Environm IceMe, Nanjing 210044, Jiangsu, Peoples R China 6.Michigan State Univ, CGCEO Geog, E Lansing, MI 48823 USA 7.Univ Minnesota, Dept Forest Resources, St Paul, MN 55108 USA 8.Univ Western Sydney, Hawkesbury Inst Environm, Penrith, NSW 2753, Australia 9.Chinese Acad Sci, State Key Lab Forest & Soil Ecol, Inst Appl Ecol, Shenyang 110164, Peoples R China 10.Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA
推荐引用方式 GB/T 7714	Liu, Nana,Tian, Qiuying,Bai, Wenming,et al. A novel soil manganese mechanism drives plant species loss with increased nitrogen deposition in a temperate steppe[J]. ECOLOGY,2016,97(1):65-74.
APA	Liu, Nana.,Tian, Qiuying.,Bai, Wenming.,Li, Linghao.,Chen, Jiquan.,...&Zhang, Wen-Hao.(2016).A novel soil manganese mechanism drives plant species loss with increased nitrogen deposition in a temperate steppe.ECOLOGY,97(1),65-74.
MLA	Liu, Nana,et al."A novel soil manganese mechanism drives plant species loss with increased nitrogen deposition in a temperate steppe".ECOLOGY 97.1(2016):65-74.