Biotic and climatic controls on interannual variability in carbon fluxes 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 Kolb, Yingnian Li, Zoltan Nagy, Shuli Niu, Walter C. Oechel, Krisztina Pinter & 8 others Peili Shi, Andrew Suyker, Margaret Torn, Andrej Varlagin, Huimin Wang, Junhua Yan, Guirui Yu, Junhui Zhang

Research output: Research - peer-reviewArticle

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Abstract

Interannual variability (IAV, represented by standard deviation) in net ecosystem exchange of CO2 (NEE) is mainly driven by climatic drivers and biotic variations (i.e., the changes in photosynthetic and respiratory responses to climate), the effects of which are referred to as climatic (CE) and biotic effects (BE), respectively. Evaluating the relative contributions of CE and BE to the IAV in carbon (C) fluxes and understanding their controlling mechanisms are critical in projecting ecosystem changes in the future climate. In this study, we applied statistical methods with flux data from 65 sites located in the Northern Hemisphere to address this issue. Our results showed that the relative contribution of BE (CnBE) and CE (CnCE) to the IAV in NEE was 57%±14% and 43%±14%, respectively. The discrepancy in the CnBE among sites could be largely explained by water balance index (WBI). Across water-stressed ecosystems, the CnBE decreased with increasing aridity (slope=0.18%mm-1). In addition, the CnBE tended to increase and the uncertainty reduced as timespan of available data increased from 5 to 15 years. Inter-site variation of the IAV in NEE mainly resulted from the IAV in BE (72%) compared to that in CE (37%). Interestingly, positive correlations between BE and CE occurred in grasslands and dry ecosystems (r>0.45, P<0.05) but not in other ecosystems. These results highlighted the importance of BE in determining the IAV in NEE and the ability of ecosystems to regulate C fluxes under climate change might decline when the ecosystems experience more severe water stress in the future.

LanguageEnglish (US)
Pages11-22
Number of pages12
JournalAgricultural and Forest Meteorology
Volume205
DOIs
StatePublished - Jun 1 2015

Fingerprint

carbon flux
terrestrial ecosystem
effect
ecosystems
carbon
terrestrial ecosystems
ecosystem
climate
net ecosystem exchange
dry environmental conditions
water balance
water stress
statistical analysis
uncertainty
grasslands
climate change
water
aridity
water budget
Northern Hemisphere

Keywords

  • Biotic effect
  • Climatic effect
  • Climatic stress
  • Interannual variability
  • Net ecosystem exchange
  • Relative importance

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Forestry
  • Atmospheric Science
  • Global and Planetary Change

Cite this

Biotic and climatic controls on interannual variability in carbon fluxes 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; 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: Agricultural and Forest Meteorology, Vol. 205, 01.06.2015, p. 11-22.

Research output: Research - peer-reviewArticle

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, T, 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 2015, 'Biotic and climatic controls on interannual variability in carbon fluxes across terrestrial ecosystems' Agricultural and Forest Meteorology, vol 205, pp. 11-22. DOI: 10.1016/j.agrformet.2015.02.007
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 ; 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. / Biotic and climatic controls on interannual variability in carbon fluxes across terrestrial ecosystems. In: Agricultural and Forest Meteorology. 2015 ; Vol. 205. pp. 11-22
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AU - Aurela,Mika

AU - Billesbach,David

AU - Blanken,Peter D.

AU - Bracho,Rosvel

AU - Chen,Jiquan

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AU - Gu,Lianhong

AU - Han,Shijie

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AU - Oechel,Walter C.

AU - Pinter,Krisztina

AU - Shi,Peili

AU - Suyker,Andrew

AU - Torn,Margaret

AU - Varlagin,Andrej

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AU - Yan,Junhua

AU - Yu,Guirui

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