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High Below-Ground Productivity Allocation of Alpine Grasslands on the Northern Tibet
Niu, Ben1; Zeng, Chaoxu1,2; Zhang, Xianzhou1; He, Yongtao1; Shi, Peili1; Tian, Yuan1,2; Feng, Yunfei3; Li, Meng1,2; Wang, Zhipeng1,2; Wang, Xiangtao1,2; Cao, Yanan1,2
2019-12-01
Source PublicationPLANTS-BASEL
Volume8Issue:12Pages:17
Corresponding AuthorZhang, Xianzhou(zhangxz@igsnrr.ac.cn)
AbstractThe allocation of net primary production (NPP) between above- and belowground components is a key step of ecosystem material cycling and energy flows, which determines many critical parameters, e.g., the fraction of below ground NPP (BNPP) to NPP (f(BNPP)) and root turnover rates (RTR), in vegetation models. However, direct NPP estimation and partition are scarcely based on field measurements of biomass dynamics in the alpine grasslands on the Northern Tibetan Plateau (NTP). Consequently, these parameters are unverifiable and controversial. Here, we measured above- and belowground biomass dynamics (monthly from May to September each year from 2013 to 2015) to estimate NPP dynamics and allocations in four typical alpine grassland ecosystems, i.e., an alpine meadow, alpine meadow steppe, alpine steppe and alpine desert steppe. We found that NPP and its components, above and below ground NPP (ANPP and BNPP), increased significantly from west to east on the NTP, and ANPP was mainly affected by temperature while BNPP and NPP were mainly affected by precipitation. The bulk of BNPP was generally concentrated in the top 10 cm soil layers in all four alpine grasslands (76.1% +/- 9.1%, mean +/- SD). Our results showed that f(BNPP) was significantly different among these four alpine grasslands, with its means in alpine meadow (0.93), alpine desert steppe (0.92) being larger than that in the alpine meadow steppe (0.76) and alpine steppe (0.77). Both temperature and precipitation had significant and positive effects on the f(BNPP), while their interaction effects were significantly opposite. RTR decreased with increasing precipitation, but increased with increasing temperature across this ecoregion. Our study illustrated that alpine grasslands on the NTP, especially in the alpine meadow and alpine desert steppe, partitioned an unexpected and greater NPP to below ground than most historical reports across global grasslands, indicating a more critical role of the root carbon pool in carbon cycling in alpine grasslands on the NTP.
KeywordNet primary productivity partitioning below ground biomass root turnover rate model parameters alpine grasslands
DOI10.3390/plants8120535
WOS KeywordNET PRIMARY PRODUCTIVITY ; FINE-ROOT PRODUCTION ; CLIMATE-CHANGE ; INTERANNUAL VARIABILITY ; ABOVEGROUND BIOMASS ; GRAZING EXCLUSION ; CARBON DYNAMICS ; USE EFFICIENCY ; CO2 EXCHANGE ; TURNOVER
Indexed BySCI
Language英语
Funding ProjectMinistry of Science and Technology of China[2016YFC0502001] ; National Natural Sciences Foundation of China[41571042] ; National Natural Sciences Foundation of China[41807331] ; Chinese Academy of Sciences[KFJ-STS-ZDTP-036] ; West Light Foundation of the Chinese Academy of Sciences (2018)
Funding OrganizationMinistry of Science and Technology of China ; National Natural Sciences Foundation of China ; Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences (2018)
WOS Research AreaPlant Sciences
WOS SubjectPlant Sciences
WOS IDWOS:000506648700010
PublisherMDPI
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/131526
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhang, Xianzhou
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Tangshan Normal Univ, Dept Resource Management, Tangshan 063000, Peoples R China
Recommended Citation
GB/T 7714
Niu, Ben,Zeng, Chaoxu,Zhang, Xianzhou,et al. High Below-Ground Productivity Allocation of Alpine Grasslands on the Northern Tibet[J]. PLANTS-BASEL,2019,8(12):17.
APA Niu, Ben.,Zeng, Chaoxu.,Zhang, Xianzhou.,He, Yongtao.,Shi, Peili.,...&Cao, Yanan.(2019).High Below-Ground Productivity Allocation of Alpine Grasslands on the Northern Tibet.PLANTS-BASEL,8(12),17.
MLA Niu, Ben,et al."High Below-Ground Productivity Allocation of Alpine Grasslands on the Northern Tibet".PLANTS-BASEL 8.12(2019):17.
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