Publication Abstracts

Shi et al. 2016

Shi, Z., Y. Yang, X. Zhou, E. Weng, A.C. Finzi, and Y. Luo, 2016: Inverse analysis of coupled carbon-nitrogen cycles against multiple datasets at ambient and elevated CO2. J. Plant Ecol., 9, no. 3, 285-295, doi:10.1093/jpe/rtv059.

Aims: Carbon (C) sequestration in terrestrial ecosystems is strongly regulated by nitrogen (N) processes. However, key parameters that determine the degree of N regulation on terrestrial C sequestration have not been well quantified.

Methods: Here, we used a Bayesian probabilistic inversion approach to estimate 14 target parameters related to ecosystem C and N interactions from 19 datasets obtained from Duke Forests under ambient and elevated carbon dioxide (CO2).

Important Findings: Our results indicated that 8 of the 14 target parameters, such as C:N ratios in most ecosystem compartments, plant N uptake and external N input, were well constrained by available datasets whereas the others, such as N allocation coefficients, N loss and the initial value of mineral N pool were poorly constrained. Our analysis showed that elevated CO2 led to the increases in C:N ratios in foliage, fine roots and litter. Moreover, elevated CO2 stimulated plant N uptake and increased ecosystem N capital in Duke Forests by 25.2 and 8.5%, respectively. In addition, elevated CO2 resulted in the decrease of C exit rates (i.e. increases in C residence times) in foliage, woody biomass, structural litter and passive soil organic matter, but the increase of C exit rate in fine roots. Our results demonstrated that CO2 enrichment substantially altered key parameters in determining terrestrial C and N interactions, which have profound implications for model improvement and predictions of future C sequestration in terrestrial ecosystems in response to global change.

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BibTeX Citation

@article{sh00800c,
  author={Shi, Z. and Yang, Y. and Zhou, X. and Weng, E. and Finzi, A. C. and Luo, Y.},
  title={Inverse analysis of coupled carbon-nitrogen cycles against multiple datasets at ambient and elevated CO2},
  year={2016},
  journal={J. Plant Ecol.},
  volume={9},
  number={3},
  pages={285--295},
  doi={10.1093/jpe/rtv059},
}

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RIS Citation

TY  - JOUR
ID  - sh00800c
AU  - Shi, Z.
AU  - Yang, Y.
AU  - Zhou, X.
AU  - Weng, E.
AU  - Finzi, A. C.
AU  - Luo, Y.
PY  - 2016
TI  - Inverse analysis of coupled carbon-nitrogen cycles against multiple datasets at ambient and elevated CO2
JA  - J. Plant Ecol.
VL  - 9
IS  - 3
SP  - 285
EP  - 295
DO  - 10.1093/jpe/rtv059
ER  -

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