Global Journal of Science Frontier Research, H: Environment & Earth Science, Volume 23 Issue 2

d) Comparison between Estimated Wood Density and Database Values The difference was not significant between the calculated/measured WD and those of the Global Wood Density Database (Zane et al. 2009), particularly for tree species who’s calculated WD were lower than the WD of the GWDD base: A. bipendensis 0. 70 (± 0. 05) / 0. 73 ± 0. 05 g.cm 3 ; P. soyauxii 0. 64 (± 0. 05) / 0. 66 ± 0. 07 g.cm 3 ; the calculated WD were greater than the WD of the GWDD and E.utile 0. 55 (± 0. 03) / 0. 54 ± 0. 04 g.cm 3 and the calculated WSG were equal to the WD of the GWDD C. gabunensis 0.79 (± 0. 14) / 0. 79 ± 0. 07 g.cm 3 . And in contrast, the difference was very significant for the following species: E. cylindricum 0. 69 (± 0. 05) / 0. 57 ± 0. 04; E. suaveolens 0. 81 (± 0. 03) / 0. 77 ± 0. 06 g.cm 3 ; M. altissima 0. 63 (± 0. 02) / 0. 56 ± 0. 03 g.cm 3 ; M. excelsa 0. 65 (± 0. 08) / 0. 58 ± 0. 06 g.cm 3 and T. sclexylon 0. 44 (± 0. 07) / 0. 33 ± 0. 03 g.cm 3 (Table 2). C. gabunensis M. excelsa E. utile 1 Year 2023 7 © 2023 Global Journals Global Journal of Science Frontier Research Volume XXIII Issue ersion I VII ( H ) Wood Density Variations of Tropical Trees Differing in Shade-Tolerance and Leaf Phenology of the Congo Basin Fig. 4: Variation in Wood Density Measured (G.Cm- ³) at 8 Percent Moisture Content Along the Distance from Bark (1) to Pith (10) for the 09 Species Investigated in SFIL, Cameroon