Browsing by Author "Zahabu, E."

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A national forestry resources monitoring and assessment of Tanzania (NAFORMA)
(FAO) Vesa, L.; Malimbwi, R. E.; Tomppo, E.; Zahabu, E.; Maliondo, S.; Chamuya, N.; Maliondo, S.; Nsokko, E.; Otieno, J.; Dalsgaard, S.
A national forestry resources monitoring and assessment of Tanzania (NAFORMA)
(FAO, 2010) Vesa, L.; Malimbwi, R. E.; Tomppo, E.; Zahabu, E.; Maliondo, S.; Chamuya, N.; Maliondo, S.; Nsokko, E.; Otieno, J.; Dalsgaard, S.
In Tanzania, the state and trends of the forestry resources are largely unknown. The existing information is fragmented and outdated. Reliable information on Tanzanian forest resources is mainly constrained by the lack of institutional capacity. Under the National Forest Programme of Tanzania, the National Forestry Resources Monitoring and Assessment (NAFORMA) was identified as a priority activity for the Forest and Beekeeping Division (FBD). The results of NAFORMA are needed to support the national policy processes for the enhancement of sustainable forest management (SFM) while at the same time addressing issues of Reduced Emissions from Deforestation and Forest Degradation (REDD) and Green House Gas (GHG) as international reporting obligations. Yet, the demand of the stakeholders in Tanzania for data and information on the state of the forestry resources is continuously expanding. This project is planned to develop complete and sound baseline information on the forest and tree resources, assist the FBD to set up a specialized structure and put in place a long term monitoring system of the forestry ecosystems. The inventory will eventually yield information about vegetation cover, forest resources, forest utilization, and importance of forests and forest product for communities in Tanzania. When the inventory exercise is based on statistically sound sampling design, careful field work, and advanced data analysis, the final inventory report will provide estimates for biomass and carbon in Tanzanian forest lands. This information will serve emerging demands when building up forest monitoring system and international carbon trade schemes. Proper planning is crucial for the project to meet its goals. This includes preparation of field manual to enable field crews to collect relevant data for the project. The purpose of this field manual is to provide the FBD inventory staff with structured information on the inventory techniques that will lead to the achievement of the intended output.
Allometric Biomass and Volume Models for Cashewnut Trees
(E&D Vision Publishing Ltd) Zahabu, E.; Mlagalila, H.; Katani, J. Z.
Allometric Biomass and Volume Models for Cashewnut Trees
(E&D Vision Publishing Ltd, 2018-05-12) Zahabu, E.; Mlagalila, H.; Katani, J. Z.
Allometric Biomass and Volume Models for Coconut Trees
(E&D Vision Publishing Ltd) Zahabu, E.; Mugasha, W. A.; Malimbwi, R. E.; Katani, J. Z.
Allometric Biomass and Volume Models for Coconut Trees
(E&D Vision Publishing Ltd, 2018-05-12) Zahabu, E.; Mugasha, W. A.; Malimbwi, R. E.; Katani, J. Z.
Allometric Biomass and Volume Models for Tectona Grandis Plantations
(E&D Vision Publishing Ltd) Zahabu, E.; Mugasha, W. M.; Katani, J. Z.; Malimbwi, R. E.; Mwangi, J. R.; Chamshama, S. A. O.
Allometric Biomass and Volume Models for Tectona Grandis Plantations
(E&D Vision Publishing Ltd, 2018-05-12) Zahabu, E.; Mugasha, W. M.; Katani, J. Z.; Malimbwi, R. E.; Mwangi, J. R.; Chamshama, S. A. O.
Allometric models for prediction of above- and belowground biomass of trees in the miombo woodlands of Tanzania
(Elservier) Mugasha, W. A.; Mugasha, W. A.; Eid, T.; Bollandsås, O. M.; Malimbwi, R. E.; Chamshama, S. A. O.; Zahabu, E.; Katani, J. Z.
Assessment of fire prevalence and reduction strategies in Miombo woodlands of Eastern Tanzania
(African Journals Online) Katani, J. Z.; Madoffe, S.S.; Amanzi, N. S.; Amanzi, N. S.; Rija, A. A.; Midtgaard, F.; Mbeyale, G. E.; Zahabu, E.; Tarimo, B. C.
Assessment of fire prevalence and reduction strategies in Miombo woodlands of Eastern Tanzania
(African Journals Online, 2014-12) Katani, J. Z.; Madoffe, S.S.; Amanzi, N. S.; Amanzi, N. S.; Rija, A. A.; Midtgaard, F.; Mbeyale, G. E.; Zahabu, E.; Tarimo, B. C.
An assessment of the proximate causes, effects and factors contributing to fire prevalence was conducted in three districts covered by miombo woodlands in Eastern Tanzania. Three miombo woodlands under different management regimes and governance structures (central government forest reserve, local government forest reserve and village land forest) each were investigated in Handeni, Kilosa and Kilwa districts. Data were collected from three villages selected in each District through household surveys, Participatory Rural Appraisal (PRA), interviews of key informants and field observations. The analysis of data involved content analysis for documentary materials, descriptive statistical analysis for household surveys and Chi square was used to test whether there were differences in responses of local communities across forest management regimes. Results indicate that the major five human activities contributing to fire prevalence across the miombo woodlands include farm preparation (34.1%), hunting (28.5%), arson (21.5%), livestock grazing (9.3%) and charcoal making (0.7%). The causes were fairly the same across forest management regimes. August, September and October were the peak fire months and they were not influenced by different management regimes but by geographical locations within Eastern Tanzania. Results further show that fires in miombo woodlands usually start inside the woodland (67.2%), around residential area (22.9%) and from farms (9.9%). The origin of fire inside the woodland becomes more serious because it combines the hunting, arson, livestock grazing and charcoal making which are usually done inside the woodland. Chi-square test indicates significant difference on origin of fires across the forest management regimes (χ² = 13.341 and p = 0.031). The local communities acknowledged fires having both positive and negative effects and these effects were the same across the management regimes. Further, across the surveyed villages, strong social ties existed between fires and the daily life of local communities. Poverty, ignorance, weak law enforcement and climatic factors were identified as underlying factors contributing to fire prevalence. Fire incidences are predicted to increase given the increasing climate change. Potential strategies to reduce fires incidence identified were awareness creation, law enforcement, making fire breaks, introduction of alternative income generating activities, and improving agriculture practises. Furthermore, the use of prescribed burning to reduce effects of late fires and developing fire management plans to enhance miombo woodland management are among the strategies worth consideration by the local communities.
Assessment of tree stocking and diversity for joint forest management (JFM) in Nkweshoo village forest management area, Kilimanjaro, Tanzania
(A B Academic Publishers) Luoga, E.J.; Kajembe, G.C.; Shemweta, D.T.K.; Zahabu, E.; Mwaipopo, C. S.; Kweka, D. L.
Assessment of tree stocking and diversity for joint forest management (JFM) in Nkweshoo village forest management area, Kilimanjaro, Tanzania
(A B Academic Publishers, 2012) Luoga, E.J.; Kajembe, G.C.; Shemweta, D.T.K.; Zahabu, E.; Mwaipopo, C. S.; Kweka, D. L.
A village forest near the foot of Mount Kilimanjaro managed under Joint Forest Management (JFM) by the government and the local people was studied to assess its growing stock and to suggest interventions and management to promote its sustainable use. Data were collected using the methods of the International Forestry Resources and Institutions (IFRI) research programme. 19 tree species were identified and enumerated; the stocking was 714 trees/ha, basal area 27.5m2/ha and standing wood volume of 310 m3/ha. Almost half the standing volume was Macaranga kilimandscharica, a canopy tree species that was less desired for sawn timber and had not been over-harvested. Commercial timber production of other species that has been the dominant object of management is currently not sustainable. However, M. kilimandscharica is now the most preferred for firewood and light timber by the local user groups. Limited removal of over mature trees of this species by the local user groups for subsistence and community uses is recommended. The need for continued selective harvesting requires the determination of the sustainable allowable cut through recurrent resource assessment. Meanwhile the controlled harvesting will both demonstrate the value of the forest and motivate local people to protect it and, at the same time, increase its productivity and biodiversity.
Background on the Development of Biomass and Volume Models
(E&D Vision Publishing Ltd) Bollandsås, O. M.; Zahabu, E.; Katani, J. Z.
Background on the Development of Biomass and Volume Models
(E&D Vision Publishing Ltd, 2018-05-12) Bollandsås, O. M.; Zahabu, E.; Katani, J. Z.
Biomass and volume models for different vegetation types of Tanzania
(E&D Vision Publishing Ltd) Malimbwi, R. E.; Mauya, E. W.; Zahabu, E.; Katani, J. Z.; Chamshama, S. A. O.; Eid, T.; Bollandsås, O. M.; Maliondo, S. M. S.; Mugasha, W. A.; Masota, A. M.; Njana, M.; Makero, J. S.; Mshana, J. S.; Luganga, H.; Mathias, A.; Msalika, P.; Mwangi, J.; Mlagalila, H. E.
Biomass and volume models for different vegetation types of Tanzania
(E&D Vision Publishing Ltd, 2016) Malimbwi, R. E.; Mauya, E. W.; Zahabu, E.; Katani, J. Z.; Chamshama, S. A. O.; Eid, T.; Bollandsås, O. M.; Maliondo, S. M. S.; Mugasha, W. A.; Masota, A. M.; Njana, M.; Makero, J. S.; Mshana, J. S.; Luganga, H.; Mathias, A.; Msalika, P.; Mwangi, J.; Mlagalila, H. E.
Climate change and high rates of global carbon dioxide (CO2) emissions have increased the attention paid to the need for high-quality monitoring systems to assess how much carbon (C) is present in terrestrial systems and how these change over time. The choice of a system to adopt relies heavily on the accuracy of the method for quantifying biomass and volume as important primary variables for computing C stock and changes over time. Methods based on ground forest inventory and remote sensing data have commonly been applied in the recent decade to estimate biomass and volume in the tropical forests. However, regardless of the method, accurate tree level biomass and volume models are needed to translate field or remotely sensed data into estimates of forest biomass and volume. Therefore, the main goal of this study was to develop biomass and volume models for the forests, woodlands, thickets, agroforestry systems and some selected tree species in Tanzania. Data from destructively sampled trees were used to develop volume and above- and below-ground biomass models. Different statistical criteria, including coefficient of determination (R2), relative root mean square error (RMSE %) and Akaike Information Criterion (AIC), were used to assess the quality of the model fits. The models selected showed good prediction accuracy and, therefore, are recommended not only to support the ongoing initiatives on forest C Measurement, Reporting and Verificatio (MRV) processes but also for general forest management in Tanzania.
Charcoal potential of Mombo woodlands at kitungalo, Tanzania
(Forest Research Institute Malaysia) Malimbwi, R. E.; Zahabu, E.; Monela, G. C.; Misana, S.; Jambiya, G. C.; Mchome, B.
Charcoal potential of Mombo woodlands at kitungalo, Tanzania
(Forest Research Institute Malaysia, 2005-04-01) Malimbwi, R. E.; Zahabu, E.; Monela, G. C.; Misana, S.; Jambiya, G. C.; Mchome, B.
A study was carried out to determine the charcoal potential of the miombo woodlands of Kitulangalo area, near Morogoro, Tanzania. Systematic sampling design used in an inventory in 1996 was repeated in 1999 in order to determine the general current stand parameters and forest change. A total of 46 sample plots were laid out in the forest reserve. In adjacent public lands stratified random sampling was applied where a total of 30 plots were laid out. The layout was meant to study how species richness and wood stocking vary in public lands and forest reserve. Preferred tree species for charcoal making had standing wood volume of 24.5 m 3 ha- 1 and 56.5 m 3 ha-' in public lands and reserved forest respectively with corresponding basal area of 3.7 m 2 ha-' and 7.2 m2 ha- 1 . Stem numbers were 909 stems ha- 1 in public lands and 354 stems ha-'in the reserved forest. These values indicated more regeneration in public lands following disturbance than in the forest reserve. The weight of charcoal that can be extracted from the woodland at the roadside was 56 kg, equivalent to only one bag of charcoal per hectare. Similarly 54 bags may be extracted at 5 km distance while 125 bags may be extracted from beyond 10 km from the highway. With the established stand growth rate of 2.3 m 3 ha- 1 year-1' for the regrowth of miombo woodland at Kitulangalo, it will take about 8 to 15 years for the degraded woodlands to recover for charcoal production. Therefore, for sustainable charcoal production in this area, felling cycles of 8 to 15 years are recommended, provided the minimum tree size of > 10 cm dbh (diameter at breast height) for charcoal making is observed.
Contribution of charcoal extraction to deforestation: experience from CHAPOSA Research Project.
(Sokoine University of Agriculture) Malimbwi, R.E.; Zahabu, E.; Kajembe, G.C.; Luoga, E.J.