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Precipitation and nitrogen addition enhance biomass allocation to aboveground in an alpine steppe
Li, Changbin1,2; Zheng, Zhi1; Peng, Yunfeng3; Nie, Xiuqing1,2; Yang, Lucun1; Xiao, Yuanming1,2; Zhou, Guoying1
AbstractThere are two important allocation hypotheses in plant biomass allocation: allometric and isometric. We tested these two hypotheses in an alpine steppe using plant biomass allocation under nitrogen (N) addition and precipitation (Precip) changes at a community level. An in situ field manipulation experiment was conducted to examine the two hypotheses and the responses of the biomass to N addition (10 g N m(-2) y(-1)) and altered Precip (+/- 50% precipitation) in an alpine steppe on the Qinghai-Tibetan Plateau from 2013 to 2016. We found that the plant community biomass differed in its response to N addition and reduced Precip such that N addition significantly increased aboveground biomass (AGB), while reduced Precip significantly decreased AGB from 2014 to 2016. Moreover, reduced Precip enhanced deep soil belowground biomass (BGB). In the natural alpine steppe, the allocation between AGB and BGB was consistent with the isometric hypotheses. In contrast, N addition or altered Precip enhanced biomass allocation to aboveground, thus leading to allometric growth. More importantly, reduced Precip enhanced biomass allocation into deep soil. Our study provides insight into the responses of alpine steppes to global climate change by linking AGB and BGB allocation.
Keywordaboveground biomass belowground biomass nitrogen addition precipitation changes Tibetan alpine steppe
Subject AreaEcology ; Evolutionary Biology
Indexed BySCI
WOS Research AreaEnvironmental Sciences & Ecology ; Evolutionary Biology
WOS IDWOS:000496173700014
Publication PlaceHOBOKEN
Corresponding Author Emailzhougy@nwipb.cas.cn
OAGreen Published, gold
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Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Tibetan Med Res, 23 Xinning Rd, Xining 810008, Qinghai, Peoples R China
2.Qinghai Key Lab Qing Tibet Biol Resources, Xining, Qinghai, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Li, Changbin,Zheng, Zhi,Peng, Yunfeng,et al. Precipitation and nitrogen addition enhance biomass allocation to aboveground in an alpine steppe[J]. ECOLOGY AND EVOLUTION,2019,9(21):12193-12201.
APA Li, Changbin.,Zheng, Zhi.,Peng, Yunfeng.,Nie, Xiuqing.,Yang, Lucun.,...&Zhou, Guoying.(2019).Precipitation and nitrogen addition enhance biomass allocation to aboveground in an alpine steppe.ECOLOGY AND EVOLUTION,9(21),12193-12201.
MLA Li, Changbin,et al."Precipitation and nitrogen addition enhance biomass allocation to aboveground in an alpine steppe".ECOLOGY AND EVOLUTION 9.21(2019):12193-12201.
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