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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
Zong, Ning1; Zhao, Guangshuai1,2; Shi, Peili1,3
2019-08-01
Source PublicationECOLOGY AND EVOLUTION
ISSN2045-7758
Pages12
Corresponding AuthorZong, Ning(zongning@igsnrr.ac.cn)
AbstractThe 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.
Keywordalpine grasslands nitrogen addition precipitation gradient saturation threshold sensitivity The Changtang Plateau
DOI10.1002/ece3.5514
WOS KeywordCRITICAL LOADS ; NUTRIENT AVAILABILITY ; ECOSYSTEM STABILITY ; SPECIES-DIVERSITY ; PLANT DIVERSITY ; DEPOSITION ; BIODIVERSITY ; PRODUCTIVITY ; COMMUNITY ; SATURATION
Indexed BySCI
Language英语
Funding ProjectWest 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]
Funding OrganizationWest Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Key Research and Development Program
WOS Research AreaEnvironmental Sciences & Ecology ; Evolutionary Biology
WOS SubjectEcology ; Evolutionary Biology
WOS IDWOS:000480025500001
PublisherWILEY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68638
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZong, Ning
Affiliation1.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
Recommended Citation
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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