Sammanfattning

In the Ethiopian highlands, remarkable recovery of vegetation has been achieved using exclosures, protecting vegetation against livestock browsing and firewood harvesting. But these emerging forest resources require tools for sustainable use, implying knowledge on biomass stocks and growth. In this study we developed biomass functions estimating total, stem and branch biomass from diameter at stump height (DSH) and tree height (H) for an 11-year old exclosure in Tigray, Ethiopia. In a systematic grid of 55 plots, DSH and H of all trees and shrubs were recorded. 40 Acacia abyssinica trees were selected for destructive sampling. Allometric relationships using a natural log-log model were established between aboveground biomass, DSH and H. Models with only DSH were found best with R-2 between 0.95 and 0.98. The functions were 10 fold cross-validated and R-2_cv ranged from 0.94 to 0.97, indicating good model performance. The models were found well in range with those of other seasonal forests in East Africa. Total aboveground biomass was estimated 25.4 ton ha(-1) with an annual production of 2.3 ton ha(-1), allowing sustainable wood fuel use for 4 persons ha(-1). The presented predictive functions help to harmonize between ecological and societal objectives and are as such a first step towards an integrated planning tool for exclosures. (C) 2013 Elsevier Ltd. All rights reserved.

Nyckelord

Aboveground biomass; Allometric relation; Biomass carbon; Carbon sequestration; Empirical model; Forest restoration; Regression function

Publicerad i

Journal of Arid Environments
2013, Volym: 94, sidor: 80-86
Utgivare: ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD

SLU författare

• Barklund, Pia

  • Institutionen för skoglig mykologi och växtpatologi, Sveriges lantbruksuniversitet
    

Globala målen

Säkerställa tillgång till ekonomiskt överkomlig, tillförlitlig, hållbar och modern energi för alla
Skydda, återställa och främja ett hållbart nyttjande av landbaserade ekosystem, hållbart bruka skogar, bekämpa ökenspridning, hejda och vrida tillbaka markförstöringen samt hejda förlusten av biologisk mångfald


UKÄ forskningsämne

Ekologi
Miljövetenskap


Publikationens identifierare

DOI: https://doi.org/10.1016/j.jaridenv.2013.03.001

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/54245