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Water response of ecosystem respiration regulates future projection of net ecosystem productivity in a semiarid grassland
Lei, Lingjie; Xia, Jianyang1,2,3; Li, Xiaona4; Huang, Kun1,2,3; Zhang, Ang; Chen, Shiping5; Weng, Ensheng6; Luo, Yiqi7,8; Wan, Shiqiang
2018
发表期刊AGRICULTURAL AND FOREST METEOROLOGY
ISSN0168-1923
卷号252页码:175-191
摘要Recent evidences show that terrestrial biogeochemical models have large uncertainty in estimating climate change effect on grassland net ecosystem productivity (NEP), which is defined as the difference between gross ecosystem photosynthesis (GEP) and respiration (ER). It remains unclear that whether GEP or ER limits the model capability to simulate NEP responses to climate change in semiarid grasslands. Given the surrogate CENTURY-type model is widely used for Earth system modeling, we investigated two of them (i.e., DAYCENT and TECO models) and examined which processes dominate their ability to capture the responses of NEP to experimental climate changes in a temperate steppe of northern China. During the simulation from 2006 to 2008, the two models captured the observed mean annual NEP in the control plots when they were validated by the observations from an adjacent eddy-flux tower. However, they failed to capture the treatment effects of experimental warming and increased precipitation on NEP because of the poor estimations of ER responses. DAYCENT model simulated a higher precipitation effect on ER (37.83%) and TECO model overestimated the warming effect on ER by 8.18%. The simulation of treatment effects on ER and therefore NEP can be improved by an optimized parameterization of the water-related decay functions for soil organic carbon (C). The simulated cumulative loss of total ecosystem C stock during 2010-2100 were decreased when the TECO model used experiment-fitted parameters (0.72 kg C m(-2)) instead of using the initial validation with eddy-flux data (0.96 kg C m(-2)). The ecosystem shifted from C sink to source at threshold of 435 mm of annual total precipitation. Our findings indicate that future projection of C cycle in semiarid grasslands could be improved by better understanding of water response of ecosystem respiratory processes.
关键词Climate change Carbon cycle Ecosystem respiration Manipulative experiment Terrestrial biogeochemical model
学科领域Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
DOI10.1016/j.agrformet.2018.01.020
收录类别SCI
语种英语
WOS关键词MODEL-DATA SYNTHESIS ; SOIL CO2 EFFLUX ; CLIMATE-CHANGE ; CARBON-CYCLE ; TERRESTRIAL ECOSYSTEMS ; TEMPERATURE SENSITIVITY ; PRECIPITATION PULSES ; BIOCHEMICAL-MODEL ; RAINFALL EVENTS ; ATMOSPHERIC CO2
WOS记录号WOS:000427341400017
出版者ELSEVIER
文献子类Article
出版地AMSTERDAM
EISSN1873-2240
资助机构National Key R&D Program of China [2017YFA0604600] ; National Natural Science FoundationNational Natural Science Foundation of China (NSFC) [31430015, 41630528] ; Ministry of Science and Technology [2013CB956300] ; National 1000 Young Talents Program of China
作者邮箱jyxia@des.ecnu.edu.cn ; swan@henu.edu.cn
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ibcas.ac.cn/handle/2S10CLM1/20648
专题植被与环境变化国家重点实验室
作者单位1.Henan Univ, Coll Life Sci, Int Joint Res Lab Global Change Ecol, Kaifeng 475004, Henan, Peoples R China
2.East China Normal Univ, Sch Ecol & Environm Sci, Res Ctr Global Change & Ecol Forecasting, Shanghai, Peoples R China
3.East China Normal Univ, Sch Ecol & Environm Sci, Tiantong Natl Stn Forest Ecosyst Res, Shanghai, Peoples R China
4.Inst Ecochongming IEC, 3663 N Zhongshan Rd, Shanghai 200062, Peoples R China
5.Southwest Forestry Univ, Yunnan Acad Biodivers, Kunming, Yunnan, Peoples R China
6.Chinese Acad Sci, Inst Bot, Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
7.Columbia Univ, Ctr Climate Syst Res, New York, NY 10025 USA
8.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ USA
9.Tsinghua Univ, Dept Earth Syst Sci, Beijing, Peoples R China
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Lei, Lingjie,Xia, Jianyang,Li, Xiaona,et al. Water response of ecosystem respiration regulates future projection of net ecosystem productivity in a semiarid grassland[J]. AGRICULTURAL AND FOREST METEOROLOGY,2018,252:175-191.
APA Lei, Lingjie.,Xia, Jianyang.,Li, Xiaona.,Huang, Kun.,Zhang, Ang.,...&Wan, Shiqiang.(2018).Water response of ecosystem respiration regulates future projection of net ecosystem productivity in a semiarid grassland.AGRICULTURAL AND FOREST METEOROLOGY,252,175-191.
MLA Lei, Lingjie,et al."Water response of ecosystem respiration regulates future projection of net ecosystem productivity in a semiarid grassland".AGRICULTURAL AND FOREST METEOROLOGY 252(2018):175-191.
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