西非Sudanian热带林地11个树种地上生物量异速生长预测 |
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摘 要: |
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收稿时间: | 21 May 2009 |
Allometric prediction of above-ground biomass of eleven woody tree species in the Sudanian savanna-woodland of West Africa |
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Authors: | Louis Sawadogo Patrice Savadogo Daniel Tiveau Sidzabda Djibril Dayamba Didier Zida Yves Nouvellet Per Christer Oden Sita Guinko |
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Institution: | (1) Bureau of International Partnership, Forestry and Forest Products Research Institute, Tsukuba Ibaraki, 305-8687, Japan;(2) Faculty of Agriculture, Ehime University, Matsuyama Ehime, 790-8566, Japan;(3) Faculty of Agriculture, Kochi University, Nankoku Kochi, 783-8502, Japan;(4) Forest Department Sarawak, Kuching, 93660, Malaysia;(5) Graduate School of Kuroshio Science, Kochi University, Nankoku Kochi, 783-8502, Japan |
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Abstract: | Allometric models are necessary for estimating biomass in terrestrial ecosystems. Generalized allometric relationship exists
for many tropical trees, but species- and region-specific models are often lacking. We developed species-specific allometric
models to predict aboveground biomass for 11 native tree species of the Sudanian savanna-woodlands. Diameters at the base
and at breast height, with species means ranging respectively from 11 to 28 cm and 9 to 19 cm, and the height of the trees
were used as predictor variables. Sampled trees spanned a wide range of sizes including the largest sizes these species can
reach. As a response variable, the biomass of the trees was obtained through destructive sampling of 4 754 trees during wood
harvesting. We used a stepwise multiple regression analysis with backward elimination procedure to develop models separately
predicting, total biomass of the trees, stem biomass, and biomass of branches and twigs. All species-specific regression models
relating biomass with measured tree dimensions were highly significant (p < 0.001). The biomass of branches and twigs was less predictable compared to stem biomass and total biomass, although their
models required fewer predictors and predictor interactions. The best-fit equations for total above-ground biomass and stem
biomass had R
2 > 0.70, except for the Acacia species; for branches including twig biomass, R2-values varied from 0.749 for Anogeissus leiocarpa to 0.183 for Acacia macrostachya. The use of these equations in estimating available biomass will avoid destructive sampling, and aid in planning for sustainable
use of these species. |
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