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Large Scale Shrub Biomass Estimates for Multiple Purposes.

Teresa Enes1,2, José Lousada1,2, Teresa Fonseca2,3

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Summary

Shrub biomass accumulation in North Portugal

Keywords:
Pinus pinasterallometric equationsbioenergyproductivitywildfires

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Area of Science:

  • Ecology
  • Forestry
  • Biomass research

Background:

  • Forest fires are increasing in Portugal, converting woodlands to shrublands.
  • Shrublands are vital for soil protection, biodiversity, and carbon sequestration.
  • Assessing shrub biomass is crucial for fire management and bioenergy potential.

Purpose of the Study:

  • To assess shrub biomass accumulation over 15 years in North Portugal's burnt areas.
  • To develop a model for estimating shrub biomass based on post-fire age.
  • To provide data on shrub biomass availability for ecological and energy applications.

Main Methods:

  • Collected shrub biomass data over fifteen years in former burnt areas.
  • Developed a predictive model using post-fire time (age) as a variable.
  • Validated the model's accuracy using statistical measures.

Main Results:

  • Shrub biomass ranged from 0.12 to 28.88 Mg ha⁻¹ over 15 years post-fire.
  • The biomass estimation model showed high accuracy (R² = 0.89, p < 0.01).
  • The model achieved a Root Mean Square Error (RMSE) of 3.31 Mg ha⁻¹.

Conclusions:

  • This study offers practical data on shrub biomass in North Portugal.
  • Shrub biomass regeneration in burnt areas is significant.
  • Shrubs are a viable source for biomass energy and ecological restoration.