Direct and indirect effects of climatic variations on the interannual variability in net ecosystem exchange across terrestrial ecosystems

Junjiong Shao, Xuhui Zhou, Yiqi Luo, Bo Li, Mika Aurela, David Billesbach, Peter D. Blanken, Rosvel Bracho, Jiquan Chen, Marc Fischer, Yuling Fu, Lianhong Gu, Shijie Han, Yongtao He, Thomas E Kolb, Yingnian Li, Zoltan Nagy, Shuli Niu, Walter C. Oechel, Krisztina PinterPeili Shi, Andrew Suyker, Margaret Torn, Andrej Varlagin, Huimin Wang, Junhua Yan, Guirui Yu, Junhui Zhang

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Climatic 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.

Original languageEnglish (US)
Article number30575
JournalTellus, Series B: Chemical and Physical Meteorology
Volume68
Issue number1
DOIs
StatePublished - 2016

Fingerprint

net ecosystem exchange
terrestrial ecosystem
biome
productivity
ecosystem
respiration
path analysis
evergreen forest
vapor pressure
deciduous forest
phenology
physiology
grassland
disturbance
effect
parameter
carbon
modeling
water
rate

Keywords

  • Climatic variations
  • Direct and indirect effects
  • Interannual variability
  • Net ecosystem exchange
  • Physiological parameters
  • Relative importance

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Direct and indirect effects of climatic variations on the interannual variability in net ecosystem exchange across terrestrial ecosystems. / Shao, Junjiong; Zhou, Xuhui; Luo, Yiqi; Li, Bo; Aurela, Mika; Billesbach, David; Blanken, Peter D.; Bracho, Rosvel; Chen, Jiquan; Fischer, Marc; Fu, Yuling; Gu, Lianhong; Han, Shijie; He, Yongtao; Kolb, Thomas E; Li, Yingnian; Nagy, Zoltan; Niu, Shuli; Oechel, Walter C.; Pinter, Krisztina; Shi, Peili; Suyker, Andrew; Torn, Margaret; Varlagin, Andrej; Wang, Huimin; Yan, Junhua; Yu, Guirui; Zhang, Junhui.

In: Tellus, Series B: Chemical and Physical Meteorology, Vol. 68, No. 1, 30575, 2016.

Research output: Contribution to journalArticle

Shao, J, Zhou, X, Luo, Y, Li, B, Aurela, M, Billesbach, D, Blanken, PD, Bracho, R, Chen, J, Fischer, M, Fu, Y, Gu, L, Han, S, He, Y, Kolb, TE, Li, Y, Nagy, Z, Niu, S, Oechel, WC, Pinter, K, Shi, P, Suyker, A, Torn, M, Varlagin, A, Wang, H, Yan, J, Yu, G & Zhang, J 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, vol. 68, no. 1, 30575. https://doi.org/10.3402/tellusb.v68.30575
Shao, Junjiong ; Zhou, Xuhui ; Luo, Yiqi ; Li, Bo ; Aurela, Mika ; Billesbach, David ; Blanken, Peter D. ; Bracho, Rosvel ; Chen, Jiquan ; Fischer, Marc ; Fu, Yuling ; Gu, Lianhong ; Han, Shijie ; He, Yongtao ; Kolb, Thomas E ; Li, Yingnian ; Nagy, Zoltan ; Niu, Shuli ; Oechel, Walter C. ; Pinter, Krisztina ; Shi, Peili ; Suyker, Andrew ; Torn, Margaret ; Varlagin, Andrej ; Wang, Huimin ; Yan, Junhua ; Yu, Guirui ; Zhang, Junhui. / Direct and indirect effects of climatic variations on the interannual variability in net ecosystem exchange across terrestrial ecosystems. In: Tellus, Series B: Chemical and Physical Meteorology. 2016 ; Vol. 68, No. 1.
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AU - Zhou, Xuhui

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AU - Li, Bo

AU - Aurela, Mika

AU - Billesbach, David

AU - Blanken, Peter D.

AU - Bracho, Rosvel

AU - Chen, Jiquan

AU - Fischer, Marc

AU - Fu, Yuling

AU - Gu, Lianhong

AU - Han, Shijie

AU - He, Yongtao

AU - Kolb, Thomas E

AU - Li, Yingnian

AU - Nagy, Zoltan

AU - Niu, Shuli

AU - Oechel, Walter C.

AU - Pinter, Krisztina

AU - Shi, Peili

AU - Suyker, Andrew

AU - Torn, Margaret

AU - Varlagin, Andrej

AU - Wang, Huimin

AU - Yan, Junhua

AU - Yu, Guirui

AU - Zhang, Junhui

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