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Modeling net primary production of a fast-growing forest using a light use efficiency model

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  • Huang, Ni
  • Niu, Zheng
  • Wu, Chaoyang
  • Tappert, Michelle Coreena

Abstract

As interest grows in the quantification of global carbon cycles, Light Use Efficiency (LUE) model predictions of the forest net primary production (NPP) are being developed at an accelerating rate. Such models can provide useful predictions at large scales, but evaluating their performance has been difficult. In this study, a remote sensing-based LUE model was established to estimate forest NPP. Using the forest inventory data (FID) from the regional forest inventory survey in China and established allometric biomass equations, we calculated the biomass, the biomass increment, and the NPP of Eucalyptus urophylla (E. urophylla) plantation plots in the forestry jurisdiction of the Leizhou Forestry Bureau, Southern China. The FID-based NPP and the NPP from LUE model predictions were then compared to each other. Results show that the NPP from model predictions at a spatial resolution of 30m×30m varied from 0 to 265gC/(m2 month) and showed regional differences. In addition, the stand age had variable effects on the average individual biomass of the E. urophylla plantation plots. The average individual biomass of the young and mid-age forests increased exponentially and logarithmically with the stand age (R2=0.9178 and R2=0.8683), respectively. For young and mid-age E. urophylla plantation plots, the LUE model-predicted NPP was fairly consistent with the FID-based NPP, but the model predictions of the NPP were higher than the estimates from FID. Through the analysis of the causes of uncertainty and the possible reasons for the discrepancy between the model-based NPP and FID-based NPP, the FID-derived estimates provided a foundation for model evaluation.

Suggested Citation

  • Huang, Ni & Niu, Zheng & Wu, Chaoyang & Tappert, Michelle Coreena, 2010. "Modeling net primary production of a fast-growing forest using a light use efficiency model," Ecological Modelling, Elsevier, vol. 221(24), pages 2938-2948.
  • Handle: RePEc:eee:ecomod:v:221:y:2010:i:24:p:2938-2948
    DOI: 10.1016/j.ecolmodel.2010.08.041
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    Cited by:

    1. Wang, Chunli & Jiang, Qun'ou & Engel, Bernard & Mercado, Johann Alexander Vera & Zhang, Zhonghui, 2020. "Analysis on net primary productivity change of forests and its multi–level driving mechanism – A case study in Changbai Mountains in Northeast China," Technological Forecasting and Social Change, Elsevier, vol. 153(C).
    2. Huang, Cho-ying & Asner, Gregory P. & Barger, Nichole N., 2012. "Modeling regional variation in net primary production of pinyon–juniper ecosystems," Ecological Modelling, Elsevier, vol. 227(C), pages 82-92.

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