Publication Abstracts

Xia et al. 2015

Xia, J., S. Niu, P. Ciais, I.A. Janssens, J. Chen, C. Ammann, A. Arain, P.D. Blanken, A. Cescatti, D. Bonal, N. Buchmann, P.S. Curtis, S. Chen, J. Dong, L.B. Flanagan, C. Frankenberg, T. Georgiadis, C.M. Gough, D. Hui, G. Kiely, J. Li, M. Lund, V. Magliulo, B. Marcolla, L. Merbold, L. Montagnani, E.J. Moors, J.E. Olesen, S. Piao, A. Raschi, O. Roupsard, A.E. Suyker, M. Urbaniak, F.P. Vaccari, A. Varlagin, T. Vesala, M. Wilkinson, E. Weng, G. Wohlfahrt, L. Yan, and Y. Luo, 2015: Joint control of terrestrial gross primary productivity by plant phenology and physiology. Proc. Natl. Acad. Sci., 112, no. 9, 2788-2793, doi:10.1073/pnas.1413090112.

Terrestrial gross primary productivity (GPP), the total photosynthetic CO2 fixation at ecosystem level, fuels all life on land. However, its spatiotemporal variability is poorly understood, because GPP is determined by many processes related to plant phenology and physiological activities. In this study, we find that plant phenological and physiological properties can be integrated in a robust index — the product of the length of CO2 uptake period and the seasonal maximal photosynthesis — to explain the GPP variability over space and time in response to climate extremes and during recovery after disturbance. Terrestrial gross primary productivity (GPP) varies greatly over time and space. A better understanding of this variability is necessary for more accurate predictions of the future climate-carbon cycle feedback. Recent studies have suggested that variability in GPP is driven by a broad range of biotic and abiotic factors operating mainly through changes in vegetation phenology and physiological processes. However, it is still unclear how plant phenology and physiology can be integrated to explain the spatiotemporal variability of terrestrial GPP. Based on analyses of eddy-covariance and satellite-derived data, we decomposed annual terrestrial GPP into the length of the CO2 uptake period (CUP) and the seasonal maximal capacity of CO2 uptake (GPPmax). The product of CUP and GPPmax explained >90% of the temporal GPP variability in most areas of North America during 2000-2010 and the spatial GPP variation among globally distributed eddy flux tower sites. It also explained GPP response to the European heatwave in 2003 (r2 = 0.90) and GPP recovery after a fire disturbance in South Dakota (r2 = 0.88). Additional analysis of the eddy-covariance flux data shows that the interbiome variation in annual GPP is better explained by that in GPPmax than CUP. These findings indicate that terrestrial GPP is jointly controlled by ecosystem-level plant phenology and photosynthetic capacity, and greater understanding of GPPmax and CUP responses to environmental and biological variations will, thus, improve predictions of GPP over time and space.

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BibTeX Citation

@article{xi07000h,
  author={Xia, J. and Niu, S. and Ciais, P. and Janssens, I. A. and Chen, J. and Ammann, C. and Arain, A. and Blanken, P. D. and Cescatti, A. and Bonal, D. and Buchmann, N. and Curtis, P. S. and Chen, S. and Dong, J. and Flanagan, L. B. and Frankenberg, C. and Georgiadis, T. and Gough, C. M. and Hui, D. and Kiely, G. and Li, J. and Lund, M. and Magliulo, V. and Marcolla, B. and Merbold, L. and Montagnani, L. and Moors, E. J. and Olesen, J. E. and Piao, S. and Raschi, A. and Roupsard, O. and Suyker, A. E. and Urbaniak, M. and Vaccari, F. P. and Varlagin, A. and Vesala, T. and Wilkinson, M. and Weng, E. and Wohlfahrt, G. and Yan, L. and Luo, Y.},
  title={Joint control of terrestrial gross primary productivity by plant phenology and physiology},
  year={2015},
  journal={Proc. Natl. Acad. Sci.},
  volume={112},
  number={9},
  pages={2788--2793},
  doi={10.1073/pnas.1413090112},
}

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RIS Citation

TY  - JOUR
ID  - xi07000h
AU  - Xia, J.
AU  - Niu, S.
AU  - Ciais, P.
AU  - Janssens, I. A.
AU  - Chen, J.
AU  - Ammann, C.
AU  - Arain, A.
AU  - Blanken, P. D.
AU  - Cescatti, A.
AU  - Bonal, D.
AU  - Buchmann, N.
AU  - Curtis, P. S.
AU  - Chen, S.
AU  - Dong, J.
AU  - Flanagan, L. B.
AU  - Frankenberg, C.
AU  - Georgiadis, T.
AU  - Gough, C. M.
AU  - Hui, D.
AU  - Kiely, G.
AU  - Li, J.
AU  - Lund, M.
AU  - Magliulo, V.
AU  - Marcolla, B.
AU  - Merbold, L.
AU  - Montagnani, L.
AU  - Moors, E. J.
AU  - Olesen, J. E.
AU  - Piao, S.
AU  - Raschi, A.
AU  - Roupsard, O.
AU  - Suyker, A. E.
AU  - Urbaniak, M.
AU  - Vaccari, F. P.
AU  - Varlagin, A.
AU  - Vesala, T.
AU  - Wilkinson, M.
AU  - Weng, E.
AU  - Wohlfahrt, G.
AU  - Yan, L.
AU  - Luo, Y.
PY  - 2015
TI  - Joint control of terrestrial gross primary productivity by plant phenology and physiology
JA  - Proc. Natl. Acad. Sci.
VL  - 112
IS  - 9
SP  - 2788
EP  - 2793
DO  - 10.1073/pnas.1413090112
ER  -

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