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Different sensitivity and threshold in response to nitrogen addition in four alpine grasslands along a precipitation transect on the Northern Tibetan Plateau

文献类型：期刊论文

作者Zong, Ning3; Zhao, Guangshuai2,3; Shi, Peili1,3
刊名ECOLOGY AND EVOLUTION
出版日期2019-08-01
页码12
关键词alpine grasslands nitrogen addition precipitation gradient saturation threshold sensitivity The Changtang Plateau
ISSN号2045-7758
DOI10.1002/ece3.5514
通讯作者Zong, Ning(zongning@igsnrr.ac.cn)
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.
WOS关键词CRITICAL LOADS ; NUTRIENT AVAILABILITY ; ECOSYSTEM STABILITY ; SPECIES-DIVERSITY ; PLANT DIVERSITY ; DEPOSITION ; BIODIVERSITY ; PRODUCTIVITY ; COMMUNITY ; SATURATION
资助项目West Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China[41703079] ; National Natural Science Foundation of China[31870406] ; National Key Research and Development Program[2016YFC0501803] ; National Key Research and Development Program[2017YFA0604802]
WOS研究方向Environmental Sciences & Ecology ; Evolutionary Biology
语种英语
WOS记录号WOS:000480025500001
出版者WILEY
资助机构West Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Key Research and Development Program
源URL[http://ir.igsnrr.ac.cn/handle/311030/68637]  
专题中国科学院地理科学与资源研究所
通讯作者Zong, Ning
作者单位1.Univ Chinese Acad Sci, Beijing, Peoples R China
2.China Natl Forestry Econ & Dev Res Ctr, Beijing, Peoples R China
3.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
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]. ECOLOGY AND EVOLUTION,2019:12.
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,12.
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 (2019):12.

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来源：地理科学与资源研究所

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