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Open AccessArticle

Large Scale Shrub Biomass Estimates for Multiple Purposes

1
Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal
2
Department of Forestry Sciences and Landscape Architecture (CIFAP), University of Trás-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal
3
Forest Research Centre (CEF), Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal
4
Department of Forestry Sciences, Agrarian Superior School, Polytechnic Institute of Viseu, 3500-606 Viseu, Portugal
5
Águeda School of Technology and Management, University of Aveiro (ESTGA-UA), 3754–909 Águeda, Portugal
*
Author to whom correspondence should be addressed.
Life 2020, 10(4), 33; https://doi.org/10.3390/life10040033
Received: 30 January 2020 / Revised: 24 March 2020 / Accepted: 26 March 2020 / Published: 30 March 2020
(This article belongs to the Section Ecological Research)
With the increase of forest fires in Portugal in recent decades, a significant part of woodlands is being converted into shrubland areas. Background: From an ecological point of view, woodlands and shrublands play an essential role, as they not only prevent soil erosion and desertification, but also contribute to soil protection, habitat preservation and restoration, and also increased biodiversity for carbon sequestration. Concerning the shrublands, the assessment of their biomass is essential for evaluating the fuel load and forest fire behavior and also beneficial for obtaining estimates of carbon and biomass for energy use. Methods: In this study, we collected data about the potential shrub biomass accumulation along fifteen years in former burnt areas within North Portugal. Results: The achieved results showed that for a post-fire period ranging from one to 15 years, the accumulated shrubs’ biomass ranged from 0.12 up to 28.88 Mg ha−1. The model developed to estimate the shrub biomass using the time after a fire (age) as a predictor variable presented a high adjustment to data (p-value of the F statistic <0.01 and R2 = 0.89), allowing estimating shrub biomass regeneration within former burnt areas with an RMSE of 3.31 Mg ha−1. Conclusions: This paper provides practical information on the availability and assessment of shrub biomass in North Portugal, highlighting the suitability of shrubs as potential sources of biomass. View Full-Text
Keywords: wildfires; productivity; bioenergy; allometric equations; Pinus pinaster wildfires; productivity; bioenergy; allometric equations; Pinus pinaster
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Enes, T.; Lousada, J.; Fonseca, T.; Viana, H.; Calvão, A.; Aranha, J. Large Scale Shrub Biomass Estimates for Multiple Purposes. Life 2020, 10, 33.

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