Direct and indirect effects of climatic variations on the interannual variability in net ecosystem exchange across terrestrial ecosystems
Shao, Junjiong1,2,3; Zhou, Xuhui1,2; Luo, Yiqi4; Li, Bo3; Aurela, Mika5; Billesbach, David; Blanken, Peter D.7; Bracho, Rosvel8; Chen, Jiquan9,10,11; Fischer, Marc6; Fu, Yuling12; Gu, Lianhong; Han, Shijie13; He, Yongtao14; Kolb, Thomas15; Li, Yingnian6,16; Nagy, Zoltan17; Niu, Shuli; Oechel, Walter C.18; Pinter, Krisztina17; Shi, Peili; Suyker, Andrew19; Torn, Margaret6; Varlagin, Andrej20; Wang, Huimin; Yan, Junhua21; Yu, Guirui; Zhang, Junhui
Corresponding AuthorZhou, Xuhui(xhzhou@des.ecnu.edu.cn)
AbstractClimatic variables not only directly affect the interannual variability (IAV) in net ecosystem exchange of CO2 (NEE) but also indirectly drive it by changing the physiological parameters. Identifying these direct and indirect paths can reveal the underlying mechanisms of carbon (C) dynamics. In this study, we applied a path analysis using flux data from 65 sites to quantify the direct and indirect climatic effects on IAV in NEE and to evaluate the potential relationships among the climatic variables and physiological parameters that represent physiology and phenology of ecosystems. We found that the maximum photosynthetic rate was the most important factor for the IAV in gross primary productivity (GPP), which was mainly induced by the variation in vapour pressure deficit. For ecosystem respiration (RE), the most important drivers were GPP and the reference respiratory rate. The biome type regulated the direct and indirect paths, with distinctive differences between forests and non-forests, evergreen needleleaf forests and deciduous broadleaf forests, and between grasslands and croplands. Different paths were also found among wet, moist and dry ecosystems. However, the climatic variables can only partly explain the IAV in physiological parameters, suggesting that the latter may also result from other biotic and disturbance factors. In addition, the climatic variables related to NEE were not necessarily the same as those related to GPP and RE, indicating the emerging difficulty encountered when studying the IAV in NEE. Overall, our results highlight the contribution of certain physiological parameters to the IAV in C fluxes and the importance of biome type and multi-year water conditions, which should receive more attention in future experimental and modelling research.
Keywordnet ecosystem exchange interannual variability climatic variations physiological parameters direct and indirect effects relative importance
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[31370489]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000396017000001
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorZhou, Xuhui
Affiliation1.China Normal Univ, Sch Ecol & Environm Sci, Shanghai 200062, Peoples R China
2.China Normal Univ, Ctr Global Change & Ecol Forecasting, Shanghai 200062, Peoples R China
3.Fudan Univ, Inst Biodivers Sci, Sch Life Sci, Minist Educ Key Lab Biodivers Sci & Ecol Engn, 2005 Songhu Rd, Shanghai 200438, Peoples R China
4.Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USA
5.Finnish Meteorol Inst, P Box 503, Helsinki, Finland
6.Univ Nebraska Lincoln, Dept Biol Syst Engn, Lincoln, NE 68583 USA
7.Univ Colorado, Dept Geog, Boulder, CO 80309 USA
8.Univ Florida, Sch Forest Resources & Conservat, Gainesville, FL 32611 USA
9.Michigan State Univ, Landscape Ecol Ecosystem Sci LEES Lab, E Lansing, MI 48823 USA
10.Michigan State Univ, Dept Geog, E Lansing, MI 48823 USA
11.Shanghai Key Lab Urban Ecol Processes & Eco Resto, China Normal Univ, Shanghai 2000241, Peoples R China
12.Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
13.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shuangta 110016, Liaoning, Peoples R China
14.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
15.Univ Arizona, Sch Forestry, Flagstaff, AZ 86011 USA
16.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810001, Peoples R China
17.Szent Istvan Univ, MTA SZIE Plant Ecol Res Grp, H-12103 Pater Godollo, Hungary
18.San Diego State Univ, Change Res Grp, San Diego, CA 19 USA
19.Univ Nebraska Lincoln, Sch Nat Resources, Lincoln, NE 68583 USA
20.Russian Acad Sci, N Severtsov Inst Ecol & Evolut, Moscow 119071, Russia
21.Chinese Acad Sci, South China Bot Garden, Guangzhou 51065, Peoples R China
Recommended Citation
GB/T 7714
Shao, Junjiong,Zhou, Xuhui,Luo, Yiqi,et al. Direct and indirect effects of climatic variations on the interannual variability in net ecosystem exchange across terrestrial ecosystems[J]. TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY,2016,68:16.
APA Shao, Junjiong.,Zhou, Xuhui.,Luo, Yiqi.,Li, Bo.,Aurela, Mika.,...&Zhang, Junhui.(2016).Direct and indirect effects of climatic variations on the interannual variability in net ecosystem exchange across terrestrial ecosystems.TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY,68,16.
MLA Shao, Junjiong,et al."Direct and indirect effects of climatic variations on the interannual variability in net ecosystem exchange across terrestrial ecosystems".TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY 68(2016):16.
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