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Effects of whole-tree harvesting on soil, soil water and tree growth – A dynamic modelling exercise in four long-term experiments

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  • Lampa, Martin Erlandsson
  • Belyazid, Salim
  • Zanchi, Giuliana
  • Akselsson, Cecilia

Abstract

Whole tree harvesting (WTH) following final felling of productive forests is increasingly promoted as a method to extract biomass for energy purposes. Despite its importance, there is a limited number of experimental studies investigating the impacts of WTH on forest ecosystem sustainability. Modelling studies have previously been carried out to complement and explain empirical observations from four long-term WTH experiments in Sweden. The literature shows a significant discrepancy between these studies, and open questions remain as to the fate of the base cations that are not removed in the absence of WTH. This study uses the integrated ecosystem model ForSAFE, which simulate a forest ecosystem’s biogeochemical processes and the feedbacks between these processes, to trace the fate of base cations for the said four long-term WTH experiments. The study shows that the model generally captures the observed effects of WTH on the stocks of base cations in the biomass and in the soil. The modelled results were also used to map how the base cations removed through WTH would otherwise (if left at the site) have been distributed in the ecosystem. The results indicate that the soil organic pool may be more important to the long-term base cation balance than the exchangeable pool, and should receive more attention in future research.

Suggested Citation

  • Lampa, Martin Erlandsson & Belyazid, Salim & Zanchi, Giuliana & Akselsson, Cecilia, 2019. "Effects of whole-tree harvesting on soil, soil water and tree growth – A dynamic modelling exercise in four long-term experiments," Ecological Modelling, Elsevier, vol. 414(C).
  • Handle: RePEc:eee:ecomod:v:414:y:2019:i:c:s0304380019303400
    DOI: 10.1016/j.ecolmodel.2019.108832
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    References listed on IDEAS

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    1. Zanchi, Giuliana & Belyazid, Salim & Akselsson, Cecilia & Yu, Lin, 2014. "Modelling the effects of management intensification on multiple forest services: a Swedish case study," Ecological Modelling, Elsevier, vol. 284(C), pages 48-59.
    2. Balland, Vincent & Pollacco, Joseph A.P. & Arp, Paul A., 2008. "Modeling soil hydraulic properties for a wide range of soil conditions," Ecological Modelling, Elsevier, vol. 219(3), pages 300-316.
    3. Yu, Lin & Belyazid, Salim & Akselsson, Cecilia & van der Heijden, Gregory & Zanchi, Giuliana, 2016. "Storm disturbances in a Swedish forest—A case study comparing monitoring and modelling," Ecological Modelling, Elsevier, vol. 320(C), pages 102-113.
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