Browsing by Author "Mauya, E.W."

Now showing 1 - 2 of 2

Aboveground biomass and carbon stock of Usambara tropical Rainforests in Tanzania
(Tanzania Journal of Forestry and Nature Conservation, 2021) Mauya, E.W.; Madundo, S
Forest Above ground biomass (AGB) and carbon stock (AGC) estimation is important for carbon budget accounting, sustainable forest management as well as for understanding the role of forest ecosystem in the climate change mitigation. In the recent decade, there has been a growing global interest on quantifying AGB and AGC in the tropical countries. However, the information on AGB and AGC at local and subnational scales in most of the tropical forests is scattered and not consolidated. In this study, we reviewed the existing information on AGB and AGC for tropical rainforests of northern Tanzania. We used both data published in the peer-reviewed literature and data from unpublished sources provided by various sources. Our results showed that, there are three types of data sources and methods used for estimation of AGB and AGC. These included, field, geographical information system and remote sensing. Of all the methods, field based method was applied to a large extent. The average reported minimum values of AGB and AGC are 177.00 Mg ha -1 and 88.5 Mg ha -1 , and the maximum average values are 872 Mg ha -1 and 436 Mg ha -1 respectively. Overall, the average values of AGB and AGC in the Usambara tropical mountain forests (UTMFs) are 351.08 Mg ha -1 and 175.54 Mg ha -1 respectively. Forest structure parameters, particularly tree sizes and number of tree stems, were the major structure parameters reported to affect the amount of AGB and AGC. To conclude, the study revealed that there is a progressive trend in the estimation of AGB and AGC in the UTMFs. However, more update and effective forest survey data and methods are needed particularly in west Usambara mountain forests block.
Soil organic carbon and emission factors for different land cover classes in Tanzania
(Tanzania Journal of Forestry and Nature Conservation, 2022) Mauya, E.W.; Massawe, B.H; Madundo, S; Shirima, D; Zahabu, E.
Quantification of carbon stock and development of country-specific emission factors in relation to the Agriculture, Forestry, and Other Land Use (AFOLU) sector has the potential to improve national greenhouse gas inventory systems. This study was therefore, conducted to quantify soil organic carbon (SOC) and develop emission factors using the national forest inventory data of Tanzania. The results, showed that, the mean SOC for the different land cover subclasses ranged from 31.23 Mg C /ha to 99.8 Mg C /ha. The lowest value being recorded in the bushland thicket and highest value in the forest humid mountains. Spatial interpolation map indicated that, large areas in the central part had low values of SOC, ranging from 0-53Mg C/ha. The SOC for the primary land cover classes were 37.32 Mg C/ha, 43.44 Mg C/ha, 39.68 Mg C/ha for forest, non-non forest and wetlands respectively. Their correspondingly annual emission factors were, 3.56 Mg CO2/ha/yr, 4.14 Mg CO2/ha/yr, and 3.78 Mg CO2/ha/yr, respectively. The values presented in this paper correspond to IPCC tier 2 and can be used for estimation of carbon emission at the national scale for the respective major primary land cover classes.