Browsing by Author "Ngaga, Yonika M."

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Determinants for adoption of nature-based income generating activities in Uluguru mountains, Tanzania
(ScienceDirect, 2021) Kadigi, Willickister R.; Ngaga, Yonika M.; Kadigi, Reuben M. J.
Despite the wide recognition of the potential for Nature-based Income Generating Activities (NIGAs) to enhance livelihoods and nature conservation in fragile agro-ecologies of mountain areas, certain aspects that discourage or inspire their adoption remain poorly understood. We investigated the determinants for adoption of NIGAs in Uluguru Mountains using the Generalized Linear Binary Probit model. We also used the Multivariate Analysis of Variance (MANOVA) and Discriminant Function Analysis (DFA) to find out whether our pre-selected indepen- dent variables significantly influenced the adoption of NIGAs. We underscore the need to address gender-based disparities in access to land and financial resources through the establishment of tailor-made financing schemes to promote the adoption of NIGAs.
Does participatory forest management promote sustain- able forest utilisation in Tanzania
(BioOne, 2014) Treue, T.; Ngaga, Yonika M.; Meilby, H.; Lund, J.F.; Kajembe, George C.; Iddi, S.; Blomley, T.; Theilade, I.; Chamshama, S.A.O.; Skeie, K.; Njana, M.A.; Ngowi, S.E.; Isango, J.A.K.; Burgess, N.D.
Over the past 20 years, Participatory Forest Management (PFM) has become a dominant forest management strategy in Tanzania, covering more than 4.1 million hectares. Sustainable forest use and supply of wood products to local people are major aims of PFM. This paper assesses the sustainability of forest utilisation under PFM, using estimates of forest condition and extraction rates based on forest inventories and 480 house- hold surveys from 12 forests; seven under Community Based Forest Management (CBFM), three under Joint Forest Management (JFM) and two under government management (non-PFM). Extraction of products is intense in forests close to Dar es Salaam, regardless of management regime. Further from Dar es Salaam, harvesting levels in forests under PFM are, with one prominent exception, broadly sustainable. Using GIS data from 116 wards, it is shown that half of the PFM forests in Tanzania are likely to be too small to satisfy current local wood demand.
Economic viability of smallholder agroforestry and beekeeping projects in Uluguru Mountains, Tanzania: A cost benefit analysis
(Scientific Research Publishing Inc., 2021-04-02) Kadigi, Willickister R.; Ngaga, Yonika M.; Kadigi, Reuben M. J.
Agroforestry and beekeeping are widely promoted as prospective Nature- Based Income Generating Activities (NIGAs) to improve livelihoods while at the same time enhancing biodiversity conservation in degrading agro-ecologies. These activities can diversify and increase famers’ incomes and support in- stinctive biota and fauna resilience. However, evidence to showcase and com- pare their long-term benefits is scant. We use the case of Uluguru Mountains in Tanzania to evaluate and compare viability of agroforestry and beekeeping projects using the Cost Benefit Analysis (CBA) approach. The results of anal- ysis yielded positive NPVs for both agroforestry and beekeeping projects at discount rates not higher than 8.2% and 8.5% respectively. Overall, the com- parison of economic viability between agroforestry and beekeeping projects revealed that the former was relatively more profitable than the later in terms of both the NPV and Benefit Cost Ratio (BCR) criteria. However, the Internal Rate of Return (IRR) for beekeeping was slightly higher than that of agrofore- stry. Yet, we underscore the fact that these two projects can jointly be imple- mented to enhance livelihoods of farmers and support biodiversity conserva- tion in the study area and other parts with similar agro-ecologies in develop- ing countries. However, farmers in these agro-ecologies need to be supported by governments and non-government development partners in terms of training and inspiration to shift from orthodox farming to sustainable NI- GAs.
Impact of Socio-economic Activities around Lake Victoria: Land Use and Land Use Changes in Musoma Municipality, Tanzania
(Kamla-Raj, 2011) Ngaga, Yonika M.; Boon, Emmanuel K.; Giliba, Richard A.; Musamba, Emmanuel B.
Wetlands are amongst the most productive ecosystems of the Earth. Despite its potential in supporting people’s livelihood in Tanzania, Lake Victoria is being converted into other land uses. This paper evaluates the impacts of main socio-economic activities on Lake Victoria in Musoma Municipality. Primary data were gathered by administering the questionnaire to a sample of 220 households. Participatory rural appraisal techniques, participant observation and checklist were employed in data collection. The land use types and land use changes was examined through analysis of satellite imageries. This was attained by making use of ArcGIS10 and ERDAS Imagine 9.1. The socio-economic data were analysed using Statistical Package for Social Sciences. The land use/cover identified were Lake Victoria, CBD, infrastructures, Kitaji swamp, fishing areas, settlement, farms, industrial areas, tarmac road and recreational areas. Findings show that there is a strong relationship (r =91.3%; p=0.001) between the anthropogenic activities and land use type/ changes. These activities have caused the deterioration of wetland area along with its values at the average rate of 6.5 hayr -1 which was observed in 2001 to 2008. Lack of awareness on the role of wetlands was found to impede the participation of local people to Lake Victoria conservation. Thus, this study recommends that, natural resources management (including wetlands) should be integrated in the curriculum of all education levels to foster awareness raising campaign on role of wetland benefits to local people’s livelihoods.
Mixed method approaches to evaluate conservation impact: evidence from decentralized forest management in Tanzania
(Foundation for Environmental Conservation, 2014-06-01) Lund, Jens Friis; Burgess, Neil D.; Chamshama, Shabani A. O.; Dons, Klaus; Isango, Jack A.; Kajembe, George C.; Meilby, Henrik; Moyo, Francis; Ngaga, Yonika M.; Ngowi, Stephen E.; Njana, Marco A.; Mwakalukwa, Ezekiel E.; Skeie, Kathrine; Theilade, Ida; Treue, Thorsten
Nearly 10% of the world’s total forest area is formally owned by communities and indigenous groups, yet knowledge of the effects of decentralized forest management approaches on conservation (and livelihood) impacts remains elusive. In this paper, the conservation impact of decentralized forest management on two forests in Tanzania was evaluated using a mixed method approach. Current forest condition, forest increment and forest use patterns were assessed through forest inventories, and changes in forest disturbance levels before and after the implementation of decentralized forest management were assessed on the basis of analyses of Landsat images. This biophysical evidence was then linked to changes in actual management practices, assessed through records, interviews and participatory observations, to provide ameasure of the conservation impact of the policy change. Both forests in the study were found to be in good condition, and extraction was lower than overall forest increment. Divergent changes in forest disturbance levels were in evidence following the implementation of decentralized forest management. The evidence from records, interviews and participatory observations indicated that decentralized management had led to increased control of forest use and the observed divergence in forest disturbance levels appeared to be linked to differences in theway that village-level forest managers prioritized conservation objectives and forest-based livelihood strategies. The study illustrates that a mixed methods approach comprises a valid and promising way to evaluate impacts of conservation policies, even in the absence of control sites. By carefully linking policy outcomes to policy outputs, such an approach not onlyidentifies whether such policies work as intended, but also potential mechanisms.
Mixed method approaches to evaluate conservation impact: evidence from decentralized forest management in Tanzania
(Foundation for Environmental Conservation, 2014) Lund, Jens. F.; Burgess, N.D.; Chamshama, Shabani A.O.; Dons, Klaus; Isango, Jack A.; Kajembe, George C.; Meilby, Henrik; Moyo, Francis; Ngaga, Yonika M.; Ngowi, Stephen E.; Njana, Marco A.; Mwakalukwa, Ezekiel E.; Skeie, Kathrine; Theilade, Ida; Treue, Thorsten
Nearly 10% of the world’s total forest area is formally owned by communities and indigenous groups, yet knowledge of the effects of decentralized forest management approaches on conservation (and livelihood) impacts remains elusive. In this paper, the conservation impact of decentralized forest management on two forests in Tanzania was evaluated using a mixed method approach. Current forest condition, forest increment and forest use patterns were assessed through forest inventories, and changes in forest disturbance levels before and after the implementation of decentralized forest management were assessed on the basis of analyses of Landsat images. This biophysical evidence was then linked to changes in actual management practices, assessed through records, interviews and participatory observations, to provide a measure of the conservation impact of the policy change. Both forests in the study were found to be in good condition, and extraction was lower than overall forest increment. Divergent changes in forest disturbance levels were in evidence following the implementation of decentralized forest management. The evidence from records, interviews and participatory observations indicated that decent- ralized management had led to increased control of forest use and the observed divergence in forest disturbance levels appeared to be linked to differences in the way that village-level forest managers prioritized conservation objectives and forest-based livelihood strategies. The study illustrates that a mixed methods approach comprises a valid and promising way to evaluate impacts of conservation policies, even in the absence of control sites. By carefully linking policy outcomes to policy outputs, such an approach not only identifies whether such policies work as intended, but also potential mechanisms.
Paying to conserve watershed services in Pangani River Basin, Tanzania
(Springer Nature Switzerland, 2015) Lalika, Makarius C.S.; Meire, Patrick; Ngaga, Yonika M.
Human beings depend on the integrity of watersheds to provide ecosys- tem services (e.g., water) that they need for their survival. The current watershed degradation represents the most serious threat to the provision of watershed ser- vices. The worldwide demand for integrated approaches to provide solutions to water flow reduction represents a significant shift towards management focussed on the sustained use of water catchment areas. This paper reports the findings of a study that was carried out to explore the potential for paying for the management of watershed areas in the Pangani River Basin in Tanzania. Site visits enabled the collection of hydrological data, and documented reviews and structured question- naires were used to collect socioeconomic data. MS Excel was applied in drawing figures. We found that the minimum and maximum quantities of water discharge were 11,300,365 and 15,839,833 m 3 and 7,787,600 and 8,602,361 m 3 in Arusha and Moshi, respectively. Similarly, the minimum and maximum revenue collec- tions from water users were €987,766, 60 and €1,659,160, 71; and €920,916, 40 and €1,456,075, 49 as projections and actual revenue collection, respectively. We conclude that water supply problems are caused by watershed degradation and obsolete water infrastructures. We recommend the integration of payment for watershed conservation approaches into watershed management to enhance sus- tainable water flow.
Perceptions of smallholder farmers on nature-based income generating activities as potential livelihood and biodiversity conservation strategies in Uluguru Mountains, Tanzania
(Academic Journals, 2021) Kadigi, Willickister R.; Ngaga, Yonika M.; Kadigi, Reuben M. J.
Nature-based Income Generating Activities (NIGAs) can enhance livelihoods of smallholder farmers and biodiversity conservation in highly degrading ecosystems. These practices are promoted by various development and conservation partners worldwide to combat land degradation and biodiversity loss. However, their adoption remains low for reasons not well understood by their promoters. This can largely be attributed to the failure of the promoters to recognise and acknowledge the perceptions and priorities of target communities. We use the case of Uluguru Mountains to investigate the perceptions of farmers regarding the NIGAs that have potential to enhance both livelihoods and biodiversity conservation. Specifically, we use the Kendall’s Coefficient of Concordance (W)/Kendall’s tau, the Spearman correlation/Spearman’s (rho), and the Likert scale methods to identify the highly ranked NIGAs and test the hypotheses that: (a) the smallholder farmers in the study area did not agree among themselves about the ranking of potential livelihood and biodiversity-enhancing NIGAs, (b) the promotion of agroforestry has reduced the communities’ reliance on firewood, building poles and wood from the Uluguru Forest Reserve (UFR). We used the latter as an indicator of improved biodiversity conservation. We found that agroforestry and beekeeping were the highly ranked NIGAs and the communities in the study area had moderately reduced their reliance on timber products from UFR. We conclude that NIGAs can significantly enhance livelihoods and conserve biodiversity in mountain areas. However, future efforts to promote them should be guided by a thorough understanding and recognition of the real needs and priorities of target beneficiaries. This is imperative for winning their support and for designing the right outreach package.
Understanding watershed dynamics and impacts of climate change and variability in the Pangani River Basin, Tanzania
(Elsevier, 2014-12-02) Lalika, Makarius C.S.; Meire, Patrick; Ngaga, Yonika M.; Chang’a, Ladislaus
Watersheds and rivers are vital ecological features for the provision of hydrological services for the health, welfare and prosperity of human communities. Nevertheless, anthropogenic activities coupled with climate change and climate variability are blamed for degrading watersheds and rivers and decreasing their capacity to irrigate. To address the situation, it is important to understand why and how water shortages are occurring. This paper reports findings of a study carried out to identify and assess drivers of water shortages and adaptation strategies to climate change and variability in Pangani River Basin of Tanzania. To assess the influence of climate change and variability on hydrological flow and water shortages, time series data on rainfall and temperature were compiled from the Tanzania Meteorological Agency. We also used structured questionnaires to collect data on villagers’ perceptions about the drivers of water shortages and adaptation strategies. Results indicated a decreasing trend of water flow (p < 0.05) at Kikuletwa– Karangai gauging station along Pangani River Basin. Trend analysis indicated a slight decrease of rainfall and increase of temperature. Although there is no empirical evidence to associate climate change with the decline of rainfall and water flow, adaptation measures need to be put in place in order to mitigate against increasing climate variability, reduced water flow, and projected climate change. Therefore, watershed conservation strategies should also focus on improving the welfare of local communities. Additionally, involvement of stakeholders in the entire PRB is crucial toward watersheds conservation for steady flow of hydrological services.
Watershed degradation and water provision in Morogoro Municipality, Tanzania
(UNESCO, 2022) Raphael, Antidius; Lalika, Makarius C.S.; Ngaga, Yonika M.