The effect of climate information in pastoralists’ adaptation to climate change: A case study of Rwenzori region, Western Uganda

Michael Nkuba (Department of Environmental Sciences, University of Botswana, Gaborone, Botswana)
Raban Chanda (Department of Environmental Sciences, University of Botswana, Gaborone, Botswana)
Gagoitseope Mmopelwa (Department of Environmental Sciences, University of Botswana, Gaborone, Botswana)
Edward Kato (International Food Policy Research Institute, Washington, District of Columbia, USA)
Margaret Najjingo Mangheni (Makerere University College of Agricultural and Environmental Sciences, Kampala, Uganda)
David Lesolle (Department of Environmental Sciences, University of Botswana, Gaborone, Botswana)

International Journal of Climate Change Strategies and Management

ISSN: 1756-8692

Article publication date: 25 July 2019

Issue publication date: 12 August 2019

Abstract

Purpose

This paper aims to investigate the effect of using indigenous forecasts (IFs) and scientific forecasts (SFs) on pastoralists’ adaptation methods in Rwenzori region, Western Uganda.

Design/methodology/approach

Data were collected using a household survey from 270 pastoralists and focus group discussions. The multivariate probit model was used in the analysis.

Findings

The results revealed that pastoralists using of IF only more likely to be non-farm enterprises and livestock sales as adaptation strategies. Pastoralists using both SF and IF were more likely to practise livestock migration.

Research limitations/implications

Other factors found to be important included land ownership, land tenure, gender, education level, non-farm and productive assets, climate-related risks and agricultural extension access.

Practical implications

Increasing the number of weather stations in pastoral areas would increase the predictive accuracy of scientific climate information, which results in better adaptive capacity of pastoralists. Active participation of pastoral households in national meteorological dissemination processes should be explored.

Social implications

A two-prong approach that supports both mobile and sedentary pastoralism should be adopted in rangeland development policies.

Originality/value

This study has shown the relevance of IFs in climate change adaptation methods of pastoralists. It has also shown that IFs compliment SFs in climate change adaptation in pastoralism.

Keywords

Citation

Nkuba, M., Chanda, R., Mmopelwa, G., Kato, E., Mangheni, M.N. and Lesolle, D. (2019), "The effect of climate information in pastoralists’ adaptation to climate change: A case study of Rwenzori region, Western Uganda", International Journal of Climate Change Strategies and Management, Vol. 11 No. 4, pp. 442-464. https://doi.org/10.1108/IJCCSM-10-2018-0073

Publisher

:

Emerald Publishing Limited

Copyright © 2019, Michael Nkuba, Raban Chanda, Gagoitseope Mmopelwa, Edward Kato and Margaret Najjingo Mangheni, David Lesolle.

License

Published by Emerald Publishing Limited. This article is published under the Creative Commons Attribution (CC BY 4.0) licence. Anyone may reproduce, distribute, translate and create derivative works of this article (for both commercial ∓ non-commercial purposes), subject to full attribution to the original publication and authors. The full terms of this licence may be seen at http://creativecommons.org/licences/by/4.0/legalcode


1. Introduction

Despite access to climate information and implementation of sedentary pastoral development interventions such as the construction of valley dams and boreholes (Muchuru and Nhamo, 2017), pastoralists are still vulnerable to climate variability. This is a major challenge in pastoral development because poor adaptation to climate-related risks has led to low milk yields and high livestock mortality, contributing to high poverty rates and destitution among pastoralists. Use of climate information improves resilience against climate-related risks. As has been observed, “managing climate variability and climate risk is not new to pastoralism” (Ericksen et al., 2013, p. 71). Opportunistic grazing habits and mobility of pastoralists have been some of the adaptive mechanisms to climate variability and change in fragile ecologies with high temporal and spatial variations in rainfall (Catley and Aklilu, 2013; Sandford, 1983; Westoby et al., 1989; Sandford and Scoones, 2006). The debate continues as to whether sedentary pastoralism, as opposed to mobile pastoralism, improves the adaptive capacity of pastoral households. This study investigated the effect of climate information on the pastoral adaptation methods.

Climate information is one of the essential factors for effective adaptation to climate variability in pastoralism (Kedir and Tekalign, 2016). Pastoralists use indigenous forecasts (IFs) (Nganzi et al., 2015) and scientific forecasts (SFs) in their adaptation to extreme weather events (Luseno et al., 2003; Lybbert et al., 2007). Indigenous knowledge is widely used in different parts of the world in predicting weather and seasonal events (Roncoli et al., 2002; Orlove. et al., 2000; Green et al., 2010; Kalanda-Joshua et al., 2011). Pastoralists change their original beliefs on forecasts related to rainfall distribution for the coming seasons upon receiving SFs (Lybbert et al., 2007). The challenge of using IFs arises from the effect of climate variability on their reliability (Ingrama et al., 2002), while unreliable forecasts have rendered SFs not be trusted by pastoralists (Demeritt et al., 2007). Due to weaknesses of using IFs or SFs exclusively, some pastoralists have resorted to using a combination of the two. A study done in Kenya investigated agro-pastoralists’ use of climate information in their adaptation strategies (Bryan et al., 2013). The findings revealed that the use of weather forecasts positively influenced adaptation. Another study revealed that the use of weather forecasts increased the likelihood of livestock migration among pastoralists in Kenya (Silvestri et al., 2012).

Further, climate information is a key factor in weather index-based livestock insurance. For instance, the rainfall index has been used in the implementation of weather index-based agricultural insurance in Kenya, Malawi, Rwanda, Ethiopia, Ghana, India and Thailand (Carter et al., 2014; Gine and Yang, 2009; Takahashi et al., 2016; Karlan et al., 2014; Cole et al., 2017). Due to challenges with rainfall data, the weather index-based livestock insurance programme among pastoralists in Kenya used satellite data in the form of normalised difference vegetation index (Jensen et al., 2017).

The Uganda National Meteorological Authority (UNMA, 2017b, 2016) has been very active in the dissemination of SFs in Uganda’s rural areas, including the cattle corridor. There has been an increase in the use of SFs due to the proliferation of local radio stations and the translation of SFs in local languages (Ziervogel, 2004; Jost et al., 2015). IFs are widely used in the pastoral households in Uganda (Orlove et al., 2010; Nganzi et al., 2015). However, there is a knowledge gap on the effect of the use of IFs only or both SFs and IFs on pastoralists’ adaptation strategies. This study attempts to address this knowledge deficiency.

Land scarcity and human population growth has led to an increase in sedentary pastoralism in pastoral areas in Uganda (Wurzinger et al., 2009). Sedentary pastoralism involves transforming pastoralists into mixed farmers in settled communities. This increases their access to social services such education, health and water for livestock production. More importantly, the Uganda Government uses the approach in reducing violent conflicts between pastoralists and the neighbouring farming communities, as is the case, for example, with the Karamojong in the North East (Ide et al., 2014). Mobile pastoralism involves practising opportunistic grazing and extensive herd mobility in the rangelands of Uganda as an adaptation to climate-related risks.

This paper investigates the influence of the use of IFs and/or SFs on climate change adaptation among pastoralists in Rwenzori region in Western Uganda. The research question was “do IF and/or SF have an effect on pastoralists’ adaptation strategies?” The study’s objective was to generate empirical evidence that could be used by policymakers, development partners; non-governmental organisations to support pastoralists’ adaptation to climate variability and change. The study findings also have implications for pastoral-meteorology policies in sub-Saharan Africa.

2. Materials and methods

2.1 The study area

Data on pastoralists was gathered from Kasese and Ntoroko districts in the cattle corridor of Western Uganda (Figure 1). These two districts have rangelands that are suitable for both livestock and wildlife. The wildlife protected areas (WPA) found in this part of the cattle corridor include Queen Elisabeth National Park in Kasese district and Toro-Semiliki game reserve in Ntoroko district (Figure 1). Other natural resources found in this area include fisheries resources in Lake Edward, Lake Albert, Lake George and River Semiliki. Mobile pastoralism is practised, with migration from Ntoroko district to the Eastern part of the Democratic Republic (DR) of Congo through River Semiliki. The Eastern part of the DR of Congo has abundant forage resources. However, conflicts in Eastern DR Congo have resulted into migration into Uganda (KRC and RFPJ, 2012). Sedentary pastoral policies led to the drop in the number of pastoralists in the cattle corridor in Uganda, especially in Kasese district (Wurzinger et al., 2009; Wurzinger et al., 2006). The Rwenzori region experiences bimodal rainfall distribution from March to May and July to November. Climate-related risks such as droughts and floods have resulted into pastoralists encroaching on the WPA. As a result of pastoralists’ encroachment into protected areas, the Uganda wildlife authority imposes heavy penalties on the culprits such as prosecution through courts of law. Climate-related risks are prevalent in the region, with increased frequency and severity due to climate variability (NAPA, 2007). The common pastoral adaptation methods include livestock diversification, herd mobility and migration (RTT, 2011; Oxfam, 2008). In line with sedentarisation[1] of pastoralists, the Uganda Government has embarked on infrastructure development[2] in the cattle corridor[3]. However, pasture scarcity during the long dry spells and droughts has remained a challenge for pastoralists. The meteorological station density in the pastoral areas is low (Figure 1).

2.2 Sample size

A two-stage stratified approach was used in the sampling of the respondents (Cochran, 1963). The first stage units were the agro-ecological systems (Table I) and second stage units were households. The sampling took into consideration pastoralism and arable farming in the selection of the respondents. The 2014 Uganda population census report gave the number of households in the area to be 102,496 households. Raosoft (2004), a sample size calculator, showed that a statistically acceptable sample size for this population of households at 95 per cent confidence level and margin of error of 3.5 per cent was 778. However, to allow for replacement in the sample of those who might back out of the study, 19 per cent of the statistically selected sample was included giving a total study sample of approximately 924. This was also to ensure good size for sub samples (for those who use IF only, and both SF and IF). After data cleaning, 17 incomplete questionnaires were eliminated from the final analysis. At the end of the study 907 questionnaires were completely answered giving a response rate of 98 per cent comprising of 580 arable farmers, 270 pastoralists and 57 agro-pastoralists. This paper limits itself to the 270 pastoralists in the sample. Random sampling was used in the selection of survey respondents.

2.3 Data collection methods

Data were gathered from August to October 2015. The household survey was used to gather data on adaptation methods, household characteristics, use of IF and SFs, institutional access and land tenure. Focus group discussions[4] and key informant interviews[5] were used to triangulate[6] the information from the survey. Two focus discussion groups (FDGs) were conducted at Rwebisengo village found in Rwebisengo sub-county in Ntoroko district. One focus group consisted of 14 female pastoralists, while the second comprised of 18 male pastoralists. This gender separation ensured a conducive environment for expression. The key informants included the technical officials from the district local government service commissions of Kasese and Ntoroko from the departments of agricultural production, wildlife officers and a meteorologist from UNMA. Data were analysed using Stata 12 statistical software.

2.4 Econometric estimation of climate change adaptation methods

The probit model has been used in pastoralists’ climate change adaptation analysis (Silvestri et al., 2012). In using univariate models such as probit or logit the assumption is that the pastoralists’ decision to, for instance, destock is not influenced by their decision to adopt livestock diversification as an adaptive strategy. Some studies have used the multinomial model in the analysis of pastoralists’ adaptation to climate change (Bryan et al., 2013). Multinomial models, namely, multinomial probit and multinomial logit have an assumption of no relationship between adaptation strategies (Young et al., 2009). This suggests that adaptation strategies are incompatible, yet pastoralists use the strategies concurrently in their rangeland management practices. Failure to consider unobserved factors[7] and interrelationships[8] in the use of adaptation strategies results into biased and inefficient estimates (Greene, 2003). This suggests simultaneous modelling provides for the relationship between adaptation strategies. The multivariate probit (MVP) model is suitable in providing for the interrelationships in the use of strategies. The MVP analyses the effect of independent variables on the use of each of the adaptation strategies, while it provides for the unobserved and unmeasured factors (error terms) to be freely correlated (Asfaw et al., 2014). There are complementarities and substitutability (Mehar et al., 2016) between the strategies. The MVP has been used in adaptation studies (Kpadonou et al., 2017; Ali and Erenstein, 2017; Yegbemey et al., 2013; Mehar et al., 2016; Asfaw et al., 2016; Piya et al., 2013; Tesfaye and Seifu, 2016). Therefore, MVP was used in this study.

The empirical model specified as follows:

Yi=β+πindigenousforecasts+φScientificforecats+θHouseholdchatacteristics+μ

where Y represents the adaptation methods, β is the constant term and µ is the error term. π, φ, φ and θ are parameter estimates for IFs only, SFs and IFs, control variables, respectively.

Where Yi(i = 1, 2, 3, 4, 5 and 6) representing the adaptation methods for pastoralists Y1i = 1, if the pastoralists adapts to herd mobility[9]; Y2i = 1, if the pastoralists adapts to livestock diversification; Y3i = 1, if the pastoralists adapts to livestock migration[10]; Y4i = 1, if the pastoralists adapt to selling livestock; Y5i = 1, if the pastoralists adapts to water pan and well excavation; and Y6i = 1, if the pastoralists adapt to switching from farm to non-farm enterprises. The exogenous control variables were: household characteristics (H): the level of education, age, sex and farming experience; (I): access to agricultural extension, credit access and non-farm access; institutional arrangements on land (Q): purchased and inheritance; land tenure (T): freehold and customary; climate-related risks (C): flood experience and drought experience; wealth (W): number of local produced in the past 12 months; ownership of productive assets (O): sprayers; ownership of transport assets bicycle, vehicle and motor cycle (V); and non-farm engagement fishnets (N). The expected signs for the variables are indicated in Table II.

Using the MVP model, coefficients β, φ and π were estimated. After estimating the coefficients and level of significance, the determinants of pastoralists’ adaptation methods were ascertained.

3. Results

3.1 Descriptive statistics

The results show that respondents were mostly male (59 per cent). The average number of local cows produced in the past 12 months was 70, a proxy for wealth status of pastoralists in the area. Over half (59 per cent) used both IFs and SFs, 41 per cent used IFs only and only one respondent used SFs only in their climate change adaptation strategies. Less than half (47 per cent) had attained primary education and 38 per cent had no formal education. The most important adaptation methods were livestock migration (83 per cent), herd mobility (55 per cent), livestock diversification (54 per cent) and livestock sales (51 per cent). Climate-related risks were very important in pastoralists’ climate change adaptation methods (Table III). The key factors that enhanced participation in non-farm enterprises included land ownership, level of education and transportation assets such as motor cycle and bicycle, non-farm engagement assets such as fishnets and boats. Production assets such as sprayers and transportation assets such as bicycles, and access to hired labour were very important in livestock-related adaptation methods. Use of both forecasts was very important in livestock migration. Access to land through purchasing facilitated adaptation, implying that land markets were functional in the study area. Pastoralists not only used range resources but also fisheries resources in the lakes and rivers found in the study area, as is evidenced by ownership of boats and fishnets. Over three-quarters of the households used onset and cessation forecasts, implying their relevance in pastoralism.

3.2 Econometric results

3.2.1 The effect of using climate information on pastoralists’ climate adaptation methods.

The study shows that use IFs had a positive effect on pastoralists’ climate change adaptation. Pastoralists using of IFs only were more likely to be engaged in non-weather related activities such as non-farm enterprises and livestock sales (Table IV). This establishes the significance of IFs in pastoralism. The results also suggest that using IFs only influences decision making under sedentary pastoralism. Distress livestock sales are commonly done by the onset of rains for weak livestock that may not be fit for migration over long distances such as crossing over to the Eastern part of DR Congo. The incomes from livestock sales are then invested in non-farm enterprises. Pastoralists use the climate information in planning for the search for water and pastures for their livestock. It was interesting to note that IF only short-range forecasts had a negative effect on livestock migration (Table IV).

The findings also show that the use of both IFs and SFs had a significant positive effect on pastoralists’ climate change adaptation. Pastoralists using both SFs and IFs were more likely to practise livestock migration (Table V). This suggests that using both SFs and IFs influences decision making under mobile pastoralism. The study has established that pastoralists did not use short-range forecasts (Table IV) but rather used seasonal climate forecasts in their decision making in the search for water and pastures (Table V). The results reveal that IF enhances SF in pastoralism.

The results of the MVP model (using robust standard errors) for investigating the influence of using IFs only and both SFs and IFs on pastoralists’ adaptation methods are shown in Tables IV and V. The likelihood ratio statistics [Wald chi-square (χ2)] for the use of IFs only and both SFs and IFs (Tables IV and V) are significant (p = 0.0000), signifying the relevance of the model in explaining the influence of use of IFs only and both SFs and IFs in pastoralists’ adaptation methods. This justifies the use of simultaneous modelling with MVP instead of single probit models. The correlation coefficients of the error terms for IFs only and both SFs and IFs are significant (Tables VI and VII) for any two equations, which indicates that there are adaptation methods, which complemented each other and some adaptation methods, which substituted one another.

The results (Table VII) of the complementarities and substitutes between adaptation methods for pastoralists who used both SFs and IFs were similarities and differences to those of IFs only (Table VI). For pastoralists using both SFs and IFs, herd mobility significantly complemented well excavation. Herd mobility involves livestock movement over distances that enable the livestock to return to the homestead that very day while livestock migration involves long distance where the livestock do not return to the homestead that very day. Herd mobility involves the search for pastures and wells are usually excavated in the neighborhood of the homestead. For pastoralists using both SFs and IFs, well excavation significantly substituted livestock sales.

3.2.2 Other determinants of pastoralists’ adaptation methods.

Pastoral households with non-farm assets such as fishnets were more likely to diversify their livestock and to engage in non-farm enterprises (Tables IV and V)[11]. The incomes from fish enterprises were invested in buying livestock and in non-farm enterprises. This could be due to pull factors associated with wealthy pastoralists investing in other natural resource ventures or push factors for the poor pastoralists spreading their risks against possible livestock losses due to climate-related risks such as droughts, floods or disease epidemics. The latter has implications on the poverty reduction strategies while the former has the implication of over-exploitation of the fisheries by overfishing through the increase of a number of fishnets used. Thus, on one hand, managers of fisheries limit the number of fishers, fishnets and boats on Uganda water bodies as a strategy to control over-fishing; and on the other hand poverty reduction strategies are promoting rural livelihood diversification among livestock farmers through the utilisation of other natural resources such as fisheries. This is a catch 22 for national policymakers in developing countries like Uganda. Boat ownership decreased the likelihood of herd mobility. This suggests that owning a boat necessitates one to go fishing or have close supervision of the catch at the landing site; and a lifestyle, which conflicts with herd mobility.

Pastoral households with transportation assets such bicycles were less likely to be involved in the water pan and well excavation but more likely to adapt using herd mobility (Tables IV and V). Well excavation is done in the neighborhood of the homestead or land owned by the pastoralist. Therefore, the pastoralist did not need a bicycle to access wells and water pans. It is probable that milk obtained from the lactating animals during herd mobility is transported using bicycles to the local markets.

Pastoral households with productive assets such sprayers were less likely to be engaged in non-farm enterprises (Table V). Sprayers are instrumental in the control of livestock diseases. The results suggest that non-farm assets and productive assets promote sedentary pastoralism but do not enhance mobile pastoralism.

The study also reveals that access to hired labour increased the likelihood of herd mobility and livestock diversification but decreased the likelihood of water pan and well excavation (Tables IV and V). The water pans and wells are usually dug next to the homesteads and family labour is mostly employed. Pastoralists hired young men as herdsmen in search for water and pastures to River Semiliki flood plains and the neighbourhood of Toro-Semiliki wildlife protected area. The results suggest that access to hired labour enhances mobile pastoralism.

The results of the study demonstrate that access to agricultural extension increased the likelihood of adapting to climate change (Table V). Pastoralists with access to the agricultural extension were more likely to be engaged in destocking. During periods of pasture and water scarcity, pastoralists were advised by extension agents to take on destocking to maintain a manageable number of livestock according to the availability of pastures.

The study also reveals that climate-related risks increased the likelihood of livestock migration (Tables IV and V). Pastoral households, which had flood and drought experiences were more likely to practice livestock migration. Participants in both male and female FDGs reported that “they cross to Congo”. Floods limit the movement of livestock; and reduce access to pastures by reducing the quality of and access to safe water for livestock and humans. One male FGD participant reported that “when it floods, we even fail to get clean water to drink”. The rangelands in Ntoroko are found in the flood plain of River Semiliki. Seasonal climate forecasts provide information on early warning for impending floods and droughts. Furthermore, pastoralists use their indigenous knowledge to predict the trend of floods in the rangeland. Floods significantly affect pastoralist livelihoods due to the associated human and livestock diseases such as foot rot, which could trigger diversifying into the less vulnerable small stock, such as goats. This was supported by responses from female FGD participants of the who reported that “the children get sick from worms, since the children play in the mud so they pick the worms”[…] “People suffer from malaria due to mosquito bites”[…] even the cows’ nails fall out. Seasonal forecasts (both scientific and indigenous) inform measures taken to mitigate disaster risks associated with floods and droughts. The results suggest that climate-related risks promote mobile pastoralism.

Pastoral households who acquired land through inheritance were more likely to practice well excavation (Table V). This is because land ownership rights gives them the liberty to use the land as they wish. Pastoral households, which acquired land through inheritance and purchase were less likely to be engaged in non-farm enterprises (Tables IV and VII). The land was acquired primarily for providing pastures, especially during the wet season. The male focus group participants reported that landlords graze their livestock in the commons during long dry spells and droughts. Although the land was acquired for pasture provision, which is important to well excavation (Table V), it limits the mobility and flexibility in pastoralism. Mobility and flexibility contribute to an increase in livestock numbers that are sold to invest in non-farm enterprises.

The study revealed mixed results about the effect of land tenure on pastoral adaptation strategies. Customary land tenure had a significant positive effect on non-weather based adaptation measures such as non-farm enterprises but freehold land tenure had a significant negative effect on herd mobility, livestock diversification and destocking (Tables III and VI). Customary land tenure permitted open access grazing and the returns from milk and beef sales were invested in non-farm enterprises. Freehold promotes sedentary pastoralism while mobile pastoralism that involves herd mobility tends to enhance livestock diversification and destocking of weak and old animals.

Being a male pastoralist increased the likelihood of herd mobility (Table IV). The search for pastures and water for livestock over long distances is a very strenuous activity and tends to mainly involve herdsmen in pastoral communities. This was supported by the response from a participant in the female focus group discussion who said that “the men migrated with the cattle and went away to look for where to graze”. The results suggest that being male pastoralist enhances mobile pastoralism.

Pastoral households with land ownership were more likely to be engaged in non-climate-related ventures such as non-farm enterprises (Tables IV and V). Pastoralists who owned land invested in pasture development and improved livestock management practices. This led to an increase in return on investments from the livestock enterprises through participation in the local milk and beef markets. The returns could then be invested in non-farm enterprises. According to one key informant, some pastoralists had secured support in infrastructure development such as fencing from the defunct National Agricultural Advisory Services. A key informant and the male focus group participants revealed that there had been a reduction in the amount of land under open access due to land acquisition in customary lands. This has led to a reduction in the mobility of pastoralists due to an increase in sedentary human and livestock populations. The results suggest that land ownership promotes sedentary pastoralism.

The study shows that education level increased the likelihood of adapting to climate change (Table V). Pastoralists with an advanced level of education were more likely to be engaged in non-climate-related ventures such as non-farm enterprises. The results suggest that education level promoted sedentary pastoralism.

4. Discussion

The study revealed that pastoralists using of IFs only were more likely to be engaged in non-farm enterprises and livestock sales. During onset, there is a spread of water-borne diseases and worms (Bett et al., 2009; Woods, 1988; Munyua et al., 2010). This results into livestock sales involving weak animals. Livestock farmers invest the incomes from destocking in non-farm enterprises (Nkuba and Sinha, 2014; Nkuba, 2006). Pastoralists make grazing decisions related to mobility using long range rather than short-range forecasts (Luseno et al., 2003). Short range forecasts provide information about dry spells, which influence pastoralists’ decisions on destocking. A study done in Kenya showed that weather forecasts positively influenced the selling of livestock, although the influence was not statistically significant (Bryan et al., 2013). Scientific climate seasonal forecasts provide advisories about climate-related risks such as droughts and floods. UNMA provides information on disaster risk reduction and climate risks during the dissemination of seasonal climate outlooks in February and August (UNMA, 2017a, 2017b). Pastoralists had confidence in long-range scientific climate forecasts for their livestock migration planning decisions because they are based on good forecast skills (Goddard et al., 2010). The mobility of pastoralists using rangelands is based on long-range forecasts (Luseno et al., 2003). The study reveals that the use of IFs only for onset was associated with non-farm enterprises while long-range forecasts for IFs and SFs were associated with livestock migration. This is consistent with an earlier study in Kenya that revealed that pastoralists had a high interest in onset forecasts for they influenced decisions pertaining to migration patterns (Luseno et al., 2003). The study findings support the integration of IFs in the national meteorological services in Africa (Ziervogel and Opere, 2010). The findings show that for the two categories of use of forecasts, herd mobility significantly complemented with livestock diversification and livestock sales. Small stock such as goats are browsers while large stock such as cattle are grazers resulting into good utilisation of range resources in mobile pastoralism. This is consistent with pastoral literature (Blench, 2001; Huho et al., 2009). The study shows that for the two categories of use of forecasts, livestock diversification significantly complemented livestock migration. The literature on pastoralism has shown that herd mobility and livestock sales are some of the mechanisms that pastoralists use in sustainable rangeland management (Morton and Barton, 2002; Blench, 2001; McPeak, 2004; Berhanu and Beyene, 2015). The results show that pastoralists in Rwenzori region use a non-equilibrium model of range management that makes use of herd mobility, livestock migration and livestock sales as climate adaptation strategies. This is consistent with the range management literature that discusses opportunistic management (Behnke, 1994; Elliot et al., 1999; Thomas and Twyman, 2004). Non-farm enterprises are associated more with sedentary pastoralism than mobile pastoralism (Table II). This is consistent with earlier studies that revealed that settled pastoralists had better income diversification than those engaged in migration (Haji and Legesse, 2017; Elliot et al., 1999). Studies have shown that although settled pastoralists have more income sources than mobile pastoralists, they had less welfare (Berhanu and Beyene, 2015; Elliot et al., 1999). Wealthy pastoralists (using both forecast systems) with large heads of cattle do not use well excavation as a coping mechanism but livestock migration (Table V). A study done in Kenya revealed destocking as one of the coping strategies for wealthy pastoralists (Bryan et al., 2013) while poorer pastoralists were hesitant about destocking (Silvestri et al., 2012). Well excavation is associated with poorer pastoralists to address water scarcity during long dry spells. Studies have shown that incomes from fish sales are reinvested in livestock and non-farm enterprises (Olale and Henson, 2013; Nkuba and Sinha, 2014; Nkuba, 2006). Fish incomes reinvested in fish business such as an increase in the number of fish nets has sometimes led to overfishing and degradation of fisheries (Hartwick and Olewiler, 1998). Pastoralists derive their livelihoods from natural resources such as rangelands and fisheries; however, there is the danger of over-exploitation of fisheries by overfishing beyond the sustainable maximum yield of the water bodies (Nkuba and Sinha, 2014). Studies have reported over-exploitation of Uganda fisheries due to increase in the fish market prices as a result of market liberalisation (Nunan, 2006; Nkuba and Sinha, 2014; Nkuba, 2006; Balirwa et al., 2003; von Sarnowski, 2004). Pastoralists with large livestock numbers are more likely to practice herd mobility and migration in search for water rather than well excavation (Berhanu and Beyene, 2015). During droughts and long dry spells, scarcity of pastures results into herd mobility as a coping mechanism. This is consistent with earlier studies that reported large herd owners practicing dual grazing rights in Botswana, Ethiopia and Niger (Perkins, 1996; Snorek et al., 2014; Berhanu and Beyene, 2015). In pastoral communities, herd mobility is assigned to men and the boy child. This was the case in the study area and is consistent with findings of earlier studies (Brockhaus et al., 2013). Having an advanced level of education increased the likelihood of adopting non-farm enterprises. Registration of micro-enterprises and payment of taxes to local councils requires education. This is consistent with earlier studies (Frank and Bahiigwa, 2003). The returns to labour from herd mobility were worth the investment. This is consistent with earlier studies in Ethiopia and Ivory Coast (Megersa et al., 2014; Bassett, 2009).

Although freehold tenure gives one good benefits from the land, herd mobility is a coping mechanism during long dry spells and droughts. A study done in Ivory Coast revealed that herders practice mobile pastoralism because of higher productivity and better health of their livestock than that under sedentary pastoralism (Bassett, 2009). The availability of nutritious pastures during herd mobility is linked to forage selection by livestock resulting into higher fertility and productivity, which yields higher economic returns (Idibu et al., 2016; Cañas et al., 2003; Baumont et al., 2000). Research has shown that controlled grazing results into grazing less nutritious forage especially during the dry season resulting into lower productivity (Idibu et al., 2016). On one hand granting tenure security under customary land through titling would improve pastoralists’ welfare by investing in infrastructure such as fencing, dip tanks and pasture development on private property. On the other hand, it would limit mobility and flexibility in rangelands. There is a need for the tradeoff. The World Bank strongly advocates for land tilting while the new range ecologists advocate for common property regime in rangelands (Bassett, 2009). In Botswana, for example, some mobile pastoralism was transitioned into sedentary pastoralism through the tribal grazing land policy with support from the World Bank (Perkins, 1996). This policy has produced mixed results. On the one hand, the policy helped Botswana improve its access to EU beef markets. On the hand, the policy did not lead to significant improvements in range conditions as dual grazing rights contributed to the continued degradation of communal rangelands (Perkins, 1996; Magole, 2009; Darkoh and Mbaiwa, 2002). The land tilting in Botswana has led to commercial farmers having access to both their ranches and the communal lands hence dual grazing rights (Darkoh and Mbaiwa, 2002). The establishment of fences in the rangelands not only limited livestock migration but also wildlife mobility, resulting in heavy losses during droughts (Perkins, 1996; Mbaiwa and Mbaiwa, 2006). Due to the limitation of mobility, droughts have very adverse effects on livestock farmers (Kgathi et al., 2007). Mobile pastoralism is used to adapt to climate-related risks. This is consistent with earlier studies (Huho et al., 2009; Okoti et al., 2014: Berhanu and Beyene, 2015).

5. Conclusion and recommendations

The study has established that the use of SFs and/or IFs had a significant effect on how pastoral households adapt to climate variability and change. Explicitly, the findings have revealed that pastoral households using IFs only were more likely to be engaged in non-weather related ventures such as non-farm enterprises and livestock sales, suggesting that the use of IFs was associated with sedentary pastoralism. The use of both SFs and IFs increased the likelihood of livestock migration, suggesting that mobile pastoralism was associated with both indigenous and scientific forecast systems, especially for long-range forecasts. The research has demonstrated that IFs complements SFs in pastoral adaptation to extreme weather events. Other factors found to be important in adaptation included gender, land ownership, education level, non-farm and productive assets, land tenure, agricultural extension and climate-related risks.

Climate-related risks were associated with mobile pastoralism. Non-farm assets and education level tend to promote engagement in non-weather related livelihood activities and enhance sedentary pastoralism. Livestock diversification significantly complemented herd mobility, implying that mobile pastoralism used opportunistic management of rangelands for climate change adaptation. Pastoral development policies addressing climate change adaptation should take cognizant of natural resource policies like fisheries and rangeland policies that take into account the poverty reduction strategies. Pastoral development policies addressing climate change adaptation should promote the integration of IFs in national meteorological services. A two-pronged approach that supports both mobile and sedentary pastoralism should be adopted in national rangeland policies.

IFs will continue to be part and parcel of pastoral societies in Uganda and sub-Sahara Africa. We do not challenge the use of SFs among pastoralists but confidence will improve with an increase in the number of weather stations in pastoral areas. This would reduce spatial variation and increase the precision of predictions of meteorological forecasts. Investments in more weather stations (especially automatic weather stations) in pastoral areas may lead to more accurate scientific climate information in the future. Accurate scientific climate information is the bedrock for the weather insurance index and agricultural production insurance in improving the adaptive capacity of pastoralists. Thus, there is need to replicate this study in the future when there is a significantly higher density of weather stations in the Rwenzori region of Western Uganda and compare its results to those of this baseline study.

Figures

Location map of study area

Figure 1.

Location map of study area

Sample size

Agro-ecological zone Arable farmers Pastoralists Agro-pastoralists Total
Forested 122 0 0 122
Mountainous 97 0 0 97
Wetland 82 0 0 82
Lowland 197 270 57 524
Mountainous and forested 82 0 0 82
Total 580 270 57 907

Source: Survey data (2015)

Explanatory variables for adaptation methods

Description Expected sign Cited literature
Farming experience Bryan et al., (2013)
Education level +/− Yegbemey et al. (2013); Nkonya et al. (2011); Bryan et al. (2013); Gbetibouo (2009)
Use of climate information +/− Nkonya et al. (2011); Bryan et al. (2013); Gbetibouo (2009)
Gender +/− Yegbemey et al. (2013); Nabikolo et al. (2012); Bryan et al. (2013); Ali and Erenstein (2017)
Assets +/− Nabikolo et al. (2012); Ali and Erenstein (2017)
 Credit access +/− Yegbemey et al. (2013); Nkonya et al. (2011); Ali and Erenstein (2017); Bryan et al. (2013); Gbetibouo (2009)
Agricultural extension access +/− Yegbemey et al. (2013); Nkonya et al. (2011); Bryan et al. (2013); Ali and Erenstein (2017); Gebrehiwot and van der Veen (2013)
Access to non-farm enterprises + Gebrehiwot and van der Veen (2013)
Local cows produced in the past 12 months −/+ Tambo (2016)
Assets + Nabikolo et al. (2012); Ali and Erenstein (2017); Tambo (2016)
Flood experience + Bryan et al. (2013)
Drought experience +/−  (Alauddin and Sarker (2014)
Land tenure +/−  (Nkonya et al. (2011); Gbetibouo (2009)
Institutional arrangements on land (purchased, inheritance and grabbed) +/−  (Yegbemey et al. (2013)
Access to climate change information +  (Gebrehiwot and van der Veen (2013); Tambo (2016); Deressa et al. (2008)
Government programmes on climate change +

Source: Authors specification

Descriptive summary of adaptation methods of pastoralists

Variable Herd mobility (N = 149) % Livestock diversification (N = 145) % Migrate livestock (N = 223) % Selling livestock (N = 138) % Water pan and well excavation (N = 84) % Non-farm
(N = 21) %
Both IF and SF 59 63 62 58 57 62
No school 38 34 39 38 37 24
Primary 48 49 49 48 49 62
Secondary education 12 15 11 12 12 15
Own land 78 77 83 77 83 91
Own sprayer 77 77 77 79 76 57
Own bicycle 52 46 46 45 36 33
Owns cycle 28 34 27 30 24 47
Owns fishnet 9 14 10 8 4 43
Owns boats 8 15 11 10 5 43
Hired labour access 51 53 43 54 29 48
Agri ext access 17 21 17 23 7 24
Credit access 41 41 34 29 24 24
Inheritance 38 42 40 41 46 38
Purchased 33 26 34 31 24 24
Drought experience 96 97 98 96 98 95
Flood experience 81 84 88 83 83 81
Govt climate change programme access 20 25 21 26 18 33

Source: Survey data (2015)

Determinants of pastoralists’ adaptation methods using IF only: MVP model parameter estimates

Herd mobility Livestock diversification Migrate livestock Selling livestock Water pan and well excavation Non-farm
Variable Coef Robust sth. err Coef Robust sth. err Coef Robust sth. err Coef Robust sth. err Coef Robust sth. err Coef Robust sth. err
Male 0.385** 0.182 0.080 0.176
Female 0.343 0.307
IF only onset 0.389 0.396 1.336** 0.649
IF only 5 day −0.285 0.417 −0.451** 0.222 0.510** 0.259 −0.182 0.270 −1.526** 0.680
IF only seasonal −0.485* 0.284 −0.273 0.302
Local cattle produced the past 12 months −0.001 0.001 −0.001 0.001 −0.002 0.001
No school −0.517 0.391
Advanced level 1.296* 0.676
Farm experience 0.004 0.006 0.018 0.014
Own land 1.425** 0.613
Own sprayer 0.314 0.223 −1.139*** 0.324
Own bicycle 0.505*** 0.170 −0.345 0.265
Owns cycle −0.342* 0.195 0.473 0.329
Owns fishnet 0.992* 0.511 1.029*** 0.289 1.354*** 0.387
Owns boats −1.125** 0.488
Hired labour access 0.319* 0.178 0.397** 0.176 −0.465** 0.187
Agri ext access 0.348 0.233 0.680*** 0.240
Non-farm access −0.280 0.262 0.287 0.225
Inheritance 0.177 0.165 −0.504* 0.299 −1.797*** 0.437
Purchased −0.383 0.341 −1.588*** 0.474
Grabbed −0.851 0.892
Customary −0.344 0.262 1.188** 0.460
Freehold −0.575*** 0.187 −0.656** 0.259 −0.388** 0.180 0.619 0.474
Drought experience 0.949** 0.391
Flood experience 0.127 0.240 1.071*** 0.300 −0.389 0.273
_cons 0.102 0.261 −0.038 0.268 −0.055 0.442 0.115 0.238 −0.163 0.337 −2.420** 0.929
Notes:

***, ** and *denote that significance at the 1, 5 and 10% levels, respectively. Log pseudo likelihood = −661.97; Wald χ2 (58) = 352.67; Prob > χ2 = 0.0000; N = 233, cessation was used as the reference category for the forecasts

Sources: Survey data (2015)

Determinants of pastoralists’ adaptation measures using both IF and SF: MVP model

Herd mobility Livestock diversification Migrate livestock Selling livestock Water pan and well excavation Non-farm
Variable Coef Robust sth. err Coef Robust sth. err Coef Robust sth. err Coef Robust sth. err Coef Robust sth. err Coef Robust sth. err
Male 0.302* 0.182 0.077 0.181 0.129 0.171
Female 0.238 0.216 0.148 0.286
IF and SF onset −0.233 0.176 −0.531 0.387
IF and SF 5 day 0.091 0.321
IF and SF seasonal 0.158 0.182 0.288 0.197 0.575** 0.293 0.340 0.404
Local cattle produced the past 12 months 0.004 0.003 −0.003* 0.002
Primary 0.566 0.360
Ordinary level 0.555 0.590
Advanced level 1.523** 0.762
Farm experience 0.005 0.006  −0.010  0.007
Own land −0.072 0.295 −0.371 0.333 0.970* 0.546
Own sprayer 0.198 0.212 −1.020*** 0.291
Own bicycle −0.483** 0.193 −0.236 0.290
Owns cycle 0.445 0.344
Owns fishnet 0.767 0.499 0.974*** 0.292 −1.219*** 0.390 1.088*** 0.380
Owns boats −1.076** 0.453
Hired labour access 0.413** 0.174 0.433** 0.187
Agri ext access 0.344 0.241 0.730*** 0.248 −0.398 0.281 0.148 0.335
Non-farm access −0.282 0.297  0.320  0.215
Credit access −0.462** 0.209
Inheritance 0.149 0.173 0.176 0.303 0.558*** 0.194 −1.469*** 0.418
Purchased 0.307* 0.184 0.099 0.304 −1.364*** 0.413
Grabbed 1.709*** 0.430
Customary −0.246 0.251 −0.350 0.266 −0.331 0.211 1.123** 0.453
Freehold −0.550** 0.248 −0.659** 0.262 0.446 0.515
Drought experience 1.120*** 0.425
Flood experience 0.181 0.256 0.851*** 0.280 −0.137 0.256
Govt climate change programme access −0.260 0.201 0.048 0.214 0.183 0.206 0.082 0.325
_cons 0.009 0.279 −0.094 0.287 −1.135** 0.520 −0.064 0.289 0.487 0.370 −1.943*** 0.681
Notes:

***, ** and *denote that significance at the 1, 5 and 10% levels, respectively. Log pseudo likelihood = −665.79; Wald χ2 (64) = 322.13; and Prob > χ2 = 0.0000, Cessation was used as the reference category for the forecast

Source: Survey data (2015)

Covariate matrix for those who used both SF and IF

Livestock
diversification
Migrate
livestock
Selling
livestock
Water pan and
well excavation
Non-farm
enterprises
Herd mobility 0.462*** 0.163 0.190* 0.239** 0.005
Livestock diversification 0.224* 0.081 0.045 0.170
Migrate livestock −0.010 −0.012 −0.357
Selling livestock −0.300*** −0.080
Water pan and well excavation 0.168
Notes:

***Significant at 1%; **Significant at 5%; and *Significant at 10%. Likelihood ratio test of rho21 = rho31 = rho41 = rho51 = rho61 = rho32 = rho42 = rho52 = rho62 = rho43 = rho53 = rho63 = rho54 = rho64 = rho65 = 0. χ2 (15) = 47.2445; Prob > χ2 = 0.0000

Covariate matrix for those who used IF only

Livestock diversification Migrate livestock Selling livestock Water pan and well excavation Non-farm enterprises
Herd mobility 0.503*** 0.108 0.198* 0.139 −0.062
Livestock diversification 0.211* 0.120 0.006 0.297**
Migrate livestock 0.018 −0.012 −0.277
Selling livestock −0.126 −0.120
Water pan and well excavation −0.070
Notes:

***Significant at 1%; **Significant at 5%; *Significant at 10%. Likelihood ratio test of rho21 = rho31 = rho41 = rho51 = rho61 = rho32 = rho42 = rho52 = rho62 = rho43 = rho53 = rho63 = rho54 = rho64 = rho65 = 0. χ2 (15) = 44.61666; Prob > χ2 = 0.0001

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Further reading

Gujarati, D.N. (2013), Basic Econometrics, Boston. The United States of America, McGraw-Hill companies.

Corresponding author

Michael Nkuba can be contacted at: mnkuba@gmail.com