干旱区生态环境知识资源中心(Arid): Different sensitivity and threshold in response to nitrogen addition in four alpine grasslands along a precipitation transect on the Northern Tibetan Plateau

Arid

DOI	10.1002/ece3.5514
	Different sensitivity and threshold in response to nitrogen addition in four alpine grasslands along a precipitation transect on the Northern Tibetan Plateau
	Zong, Ning 1; Zhao, Guangshuai 1,2; Shi, Peili 1,3
通讯作者	Zong, Ning
来源期刊	ECOLOGY AND EVOLUTION
ISSN	2045-7758
出版年	2019
卷号	9 期号:17 页码:9782-9793
英文摘要	The increase in atmospheric nitrogen (N) deposition has resulted in some terrestrial ecological changes. In order to identify the response of sensitive indicators to N input and estimate the sensitivity and saturation thresholds in alpine grasslands, we set up a series of multilevel N addition experiments in four types of alpine grasslands (alpine meadow [AM], alpine meadow-steppe [AMS], alpine steppe [AS], and alpine desert-steppe [ADS]) along with a decreasing precipitation gradient from east to west on the Northern Tibetan Plateau. N addition only had significant effects on species diversity in AMS, while had no effects on the other three alpine grasslands. Aboveground biomass of grasses and overall community in ADS were enhanced with increasing N addition, but such effects did not occur in AS. Legume biomass in ADS and AS showed similar unimodal patterns and exhibited a decreasing tend in AM. Regression fitting showed that the most sensitive functional groups were grasses, and the N saturation thresholds were 103, 115, 136, and 156 kg N hm(-2) year(-1) in AM, AMS, AS, and ADS, respectively. This suggests that alpine grasslands become more and more insensitive to N input with precipitation decrease. N saturation thresholds also negatively correlated with soil N availability. N sensitivity differences caused by precipitation and nutrient availability suggest that alpine grasslands along the precipitation gradient will respond differently to atmospheric N deposition in the future global change scenario. This different sensitivity should also be taken into consideration when using N fertilization to restore degraded grasslands.
英文关键词	alpine grasslands nitrogen addition precipitation gradient saturation threshold sensitivity The Changtang Plateau
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000480025500001
WOS关键词	CRITICAL LOADS ; NUTRIENT AVAILABILITY ; ECOSYSTEM STABILITY ; SPECIES-DIVERSITY ; PLANT DIVERSITY ; DEPOSITION ; BIODIVERSITY ; PRODUCTIVITY ; COMMUNITY ; SATURATION
WOS类目	Ecology ; Evolutionary Biology
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215277
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Lhasa Natl Ecol Res Stn, 11A,Datun Rd, Beijing 100101, Peoples R China; 2.China Natl Forestry Econ & Dev Res Ctr, Beijing, Peoples R China; 3.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zong, Ning,Zhao, Guangshuai,Shi, Peili. Different sensitivity and threshold in response to nitrogen addition in four alpine grasslands along a precipitation transect on the Northern Tibetan Plateau[J]. 中国科学院地理科学与资源研究所,2019,9(17):9782-9793.
APA	Zong, Ning,Zhao, Guangshuai,&Shi, Peili.(2019).Different sensitivity and threshold in response to nitrogen addition in four alpine grasslands along a precipitation transect on the Northern Tibetan Plateau.ECOLOGY AND EVOLUTION,9(17),9782-9793.
MLA	Zong, Ning,et al."Different sensitivity and threshold in response to nitrogen addition in four alpine grasslands along a precipitation transect on the Northern Tibetan Plateau".ECOLOGY AND EVOLUTION 9.17(2019):9782-9793.