Research Article

Estimates of Volume and Carbon Stock Removals in Miombo Woodlands of Mainland Tanzania

Table 2

Volume, biomass, and carbon removals by vegetation, land use, and ownership types.

Miombo management categoriesMiombo management categories subdivisionVolume (m3 ha−1 year−1)Biomass (t ha−1 year−1)Carbon (tC ha−1 year−1)
AGBBGBAGCBGC

Vegetation typesClosed woodlands (crown cover >40%)1.3 ± 0.38a0.95 ± 0.27a0.33 ± 0.08a0.46 ± 0.130.16 ± 0.04
Open woodlands (crown cover between 10 and 40%)1.8 ± 0.39a1.28 ± 0.25a0.44 ± 0.07a0.63 ± 0.120.22 ± 0.03
Woodlands with scattered cropland1.91 ± 0.79a1.47 ± 0.60a0.66 ± 0.27a0.72 ± 0.300.33 ± 0.13

Land useProduction forest2.06 ± 0.63abc1.45 ± 0.41abc0.48 ± 0.11ab0.71 ± 0.200.23 ± 0.10
Protection forest1.15 ± 0.40abc0.85 ± 0.28abc0.32 ± 0.09ab0.41 ± 0.140.16 ± 0.07
Wildlife reserve0.54 ± 0.17bc0.4 ± 0.12bc0.15 ± 0.04b0.2 ± 0.060.07 ± 0.03
Shifting cultivation3.63 ± 1.09ab2.71 ± 0.08ab1.08 ± 0.30a1.33 ± 0.390.53 ± 0.19
Agriculture2.54 ± 1.44abc1.93 ± 1.08abc0.8 ± 0.44ab0.94 ± 0.530.39 ± 0.26
Grazing land2.02 ± 1.39a1.37 ± 0.87a0.4 ± 0.18ab0.67 ± 0.430.19 ± 0.21
Built-up areas0.4 ± 0.39bc0.32 ± 0.30bc0.16 ± 0.14b0.16 ± 0.150.08 ± 0.07
Water body/swamp1.26 ± 0.93abc0.97 ± 0.78abc0.41 ± 0.39ab0.48 ± 0.350.2 ± 0.11
Other lands0.29 ± 0.18c0.23 ± 0.11c0.1 ± 0.09b0.11 ± 0.060.05 ± 0.21

Ownership typeCentral government land0.75 ± 0.25a0.55 ± 0.18b0.21 ± 0.06a0.27 ± 0.090.13 ± 0.03
Local government land1.26 ± 0.50a0.93 ± 0.36ab0.35 ± 0.13a0.46 ± 0.180.22 ± 0.06
Village land2.05 ± 0.54a1.45 ± 0.35ab0.49 ± 0.09a0.71 ± 0.170.35 ± 0.05
Private land2.67 ± 0.99a1.95 ± 0.68a0.72 ± 0.20a0.96 ± 0.340.47 ± 0.10
General land2.3 ± 1.29a1.68 ± 0.93ab0.59 ± 0.32a0.82 ± 0.460.4 ± 0.16
Not know0.77 ± 0.22a0.59 ± 0.17b0.25 ± 0.05a0.29 ± 0.040.14 ± 0.01

Note: volume and/or biomass with the same superscript letters in the category are not significantly different (p < 0.05).