期刊
FORESTS
卷 7, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/f7020038
关键词
root to shoot ratio; root sampling; tropical dry forest; error estimation; carbon
类别
资金
- Norwegian Government through the Norwegian Quota Scheme
- Norwegian University of Life Sciences
- World Wildlife Fund (WWF) under the Russel E. Train Education for Nature Fellowship
- National Research Council of Malawi
In this study we present general (multiple tree species from several sites) above- and belowground biomass models for trees in the miombo woodlands of Malawi. Such models are currently lacking in the country. The modelling was based on 74 trees comprising 33 different species with diameters at breast height (dbh) and total tree height (ht) ranging from 5.3 to 2 cm and from 3.0 to 25.0 m, respectively. Trees were collected from four silvicultural zones covering a wide range of conditions. We tested different models including dbh, ht and wood specific gravity () as independent variables. We evaluated model performance using pseudo-R-2, root mean square error (RMSE), a covariance matrix for the parameter estimates, mean prediction error (MPE) and relative mean prediction error (MPE%). Computation of MPE% was based on leave-one-out cross-validation. Values of pseudo-R-2 and MPE% ranged 0.82-0.97 and 0.9%-2.8%, respectively. Model performance indicated that the models can be used over a wide range of geographical and ecological conditions in Malawi.
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