Oliver Wasonga

Drought Adaptation and Coping Strategies Among the Turkana Pastoralists of Northern Kenya

This study highlights drought characteristics and the many responses to drought stresses employed by Turkana pastoralists of northwestern Kenya. Multiple data sources, including socioeconomic interviews with 302 households, focus group discussions, and informal interviews with pastoralists were used to capture various aspects of drought and drought adaptation and coping practices. Standardized precipitation index derived from long-term rainfall data obtained from the Kenya Meteorological Service was used to quantify different degrees of drought intensity between 1950 and 2012. Results revealed that extreme drought events were increasingly frequent, and have impacted negatively on pastoral livelihoods. In order to adapt to or cope with climatic anomalies, households are using a variety of strategies. In addition to the traditional short-term coping mechanisms, the long-term adaptation strategies used include diversification of livelihood sources; livestock mobility to track forage and water resources; diversification of herd composition to benefit from the varied drought and disease tolerance, as well as fecundity of diverse livestock species; and sending children to school for formal education as a long term investment expected to pay back through income from employment. Policies and development interventions that reduce risks, diminish livelihood constraints, and expand opportunities for increased household resilience to drought are critical complements to the existing pastoral strategies.

Measuring household vulnerability to climate-induced stresses in pastoral rangelands of Kenya: Implications for resilience programming

This study uses statistical and econometric tools to measure households’ vulnerability in pastoral rangelands of Kenya. It considered 27 socio-economic and biophysical indicators obtained from 302 households’ in-depth interviews to reflect climate vulnerability components: adaptive capacity, exposure and sensitivity. The theoretical framework used combines exposure and sensitivity to produce potential impact, which was then compared with adaptive capacity in order to generate an overall measure of vulnerability. Principal component analysis (PCA) was used to develop weights for different indicators and produce a household vulnerability index (HVI) so as to classify households according to their level of vulnerability. In order to understand the determinants of vulnerability to climate-induced stresses, an ordered probit model was employed with predictor variables. The results show that 27% of households were highly vulnerable, 44% were moderately vulnerable and 29% of households were less vulnerable to climate-induced stresses. Factor estimates of the probit model further revealed that the main determinants of pastoral vulnerability are sex of household head, age of household head, number of dependents, marital status, social linkages, access to extension services and early warning information, complementary source of income, herd size and diversity, herd structure, herd mobility, distance to markets, employment status, coping strategies and access to credit. Therefore, policies that address these determinants of vulnerability with emphasis on womens empowerment, education and income diversifications are likely to enhance resilience of pastoral households.

Global occurrence of anti-infectives in contaminated surface waters: Impact of income inequality between countries

The presence anti-infectives in environmental waters is of interest because of their potential role in the dissemination of anti-infective resistance in bacteria and other harmful effects on non-target species such as algae and shellfish. Since no information on global trends regarding the contamination caused by these bioactive substances is yet available, we decided to investigate the impact of income inequality between countries on the occurrence of anti-infectives in surface waters. In order to perform such study, we gathered concentration values reported in the peer-reviewed literature between 1998 and 2014 and built a database. To fill the gap of knowledge on occurrence of anti-infectives in African countries, we also collected 61 surface water samples from Ghana, Kenya, Mozambique and South Africa, and measured concentrations of 19 anti-infectives. A mixed one-way analysis of covariance (ANCOVA) model, followed by Turkey-Kramer post hoc tests was used to identify potential differences in anti-infective occurrence between countries grouped by income level (high, upper-middle and lower-middle and low income) according to the classification by the World Bank. Comparison of occurrence of anti-infectives according to income level revealed that concentrations of these substances in contaminated surface waters were significantly higher in low and lower-middle income countries (p=0.0001) but not in upper-middle income countries (p=0.0515) compared to high-income countries. We explained these results as the consequence of the absence of or limited sewage treatment performed in lower income countries. Furthermore, comparison of concentrations of low cost anti-infectives (sulfonamides and trimethoprim) and the more expensive macrolides between income groups suggest that the cost of these substances may have an impact on their environmental occurrence in lower income countries. Since wastewaters are the most important source of contamination of anti-infectives and other contaminants of emerging concern in the environment, it is expected that deleterious effects to the aquatic biota caused by these substances will be more pronounced in countries with inadequate wastewater and collection infrastructure. With the information currently available, we could not evaluate either the role of the receiving environment or the importance of regulatory frameworks on the occurrence of anti-infectives in surface waters. Future studies should focus on these two factors in order to better evaluate risks to aquatic ecosystems in LM&LICs. We propose that CECs such as anti-infectives could be used as a new class of environmental degradation indicators that could be helpful to assess the state of development of wastewater collection and treatment infrastructure around the world.

Determinants of perceptions of climate change and adaptation among Turkana pastoralists in northwestern Kenya

There is a growing concern that climate variability and change, combined with other environmental, social and political pressures, may overwhelm resilience of pastoral systems if local adaptation strategies are not strengthened. Understanding pastoralists’ perception of and response to climatic change is necessary for sustainable adaptation strategies. Systematic and purposive sampling techniques were used to select 302 households in Turkana County of northwestern Kenya. Descriptive statistics and Heckman probit model were used to analyse the data obtained from the households interviews. The results show that majority of households’ perceive rise in temperatures and rainfall variability over the past three decades. Pastoralists’ perception of climate change was significantly (p<.05) associated with gender of the household head, livestock ownership, herd size and access to extension services. Heckmans sample selectivity probit model revealed that factors influencing pastoralists choices of climate change adaptation include gender and education level of the household head, household size, wealth in terms of livestock ownership, distance to markets, access to credit and extension services. We conclude that as a prerequisite for long-term commitment to households climate resilience, policies and programmes should aim at improving these factors.

Role of camel milk in pastoral livelihoods in Kenya: contribution to household diet and income.

Pastoral livestock production in Kenya is subject to unpredictable rainfall and drought occurrences. These adverse climatic conditions have led to vulnerable and insecure pastoral livelihoods. Despite the potential to alleviate food insecurity of pastoral communities through continuous provision of milk and other products, the potential of camel milk is yet to be fully explored. This study was carried out to examine the contribution of camel milk to pastoral household food baskets and incomes. A semi-structured questionnaire was used to collect information targeting camel milk producers in Isiolo County, upper eastern region of Kenya. The findings show that camel milk contributes significantly to pastoral households. The contribution of the milk to a household food basket was found to be significantly higher (P ≤ 0.05) during the dry season than in the wet season. Camel milk sales contributed significantly (P ≤ 0.05) to household incomes throughout the year. These results show the role of camel milk as a complementary source of food and income for pastoral households. Therefore, interventions aimed at supporting pastoral households need to consider the promotion of camel milk production and marketing as an option for building pastoralists’ resilience against unpredictable weather.

Assessing the spatio-temporal climate variability in semi-arid Karamoja sub-region in north-eastern Uganda

Semi-arid areas show climatic variability on a spatio-temporal scale. There are few studies on the long-term trends and intensity of this variability from East Africa. We used National Ocean and Atmospheric Administration re-analysis climate data (1979–2009) in this study. Rainfall exhibited a non-significant long-term trend. The climate of the area is variable (coefficient of variation-CV >35.0%) with spatio-temporal oddities in rainfall and temperature. A rise in minimum (0.9 °C), maximum (1.6 °C) and mean (1.3 °C) temperature occurred between 1979 and 2009. There were more months with climate variability indices below the threshold (<1.0) from 1979 to 1994 than between 1995 and 2009, with wetness intensity increasingly common after 2000, leading to the observed reduction in the recurrence of multi-year drought events. More extreme wet events (rainfall variability index >2.6) were experienced between 2004 and 2009 than between 1984 and 2003. We consider that the use of spatio-temporal climatic information for timely adjustment to extreme climate variability events is essential in semi-arid areas.

Piospheric influence on forage species composition and abundance in semi-arid Karamoja sub-region, Uganda

Piospheres in semi-arid areas are gradients of animal impacts around watering holes. Few studies have examined the impact dynamics of herbaceous and woody species composition and abundance in relation to piospheres in East Africa. In this study, we identified the trend in piosphere development, assessed piosphere use and change indicators, and identified herbaceous and woody plant structure in relation to piospheres in the Karamoja sub-region, Uganda. Results revealed that piosphere development has been reactionary to drought and/or insecurity events and increased rapidly in the last decade. A diversity of herbaceous and woody plants exists around the piospheres. Use and change indicators revealed high trampling and grazing intensity, high presence of erosion signs and low litter cover. Gradient distance had both positive and negative effects on trampling intensity, percent exposure and plant height, respectively. A negative and positive effect of gradient distance was also observed on different herbaceous and woody forage species leading to the identification of both increaser and decreaser species around the piospheres. Therefore, as concentrated use of the piospheres continues unabated, an outward ripple effect leading to loss and/or increase of undesirable herbaceous and woody species will be felt. This will have an impact on the composition and abundance dynamics of desirable forage species in the sub-region.

Value chain analysis of grass seeds in the drylands of Baringo County, Kenya: A producers’ perspective

Pastoral households are increasingly practising fodder production in response to forage scarcity associated with land degradation, climate variability and change. Understanding the grass seed value chain is a prerequisite for developing sustainable fodder production and guiding appropriate out-scaling in the drylands. This study investigated the producers’ perspectives on grass seed production, marketing and challenges faced along the grass seed value chain in Marigat Sub-County of Baringo County, Kenya. The results show that the dominant actors were the bulking and processing agents who provided inputs and were a source of grass seed market to the producers. The producers preferred contractual agreements that allowed them to sell their grass seed to markets of their choice. As independent grass seed traders allowed for seed price negotiation, they were popular amongst the producers and thus handled the most volume of seeds marketed. Drought occurrence, inability of existing outlets to purchase grass seed at times, together with low prices offered for producers’ grass seed were found to be among the challenges facing the producers. There is need to strengthen the fodder groups with a possibility of registering them as cooperatives for the purpose of collective bargaining for better grass seed prices.

ABUNDANCE AND DIVERSITY OF NATIVE FORAGE SPECIES IN PASTORAL KARAMOJA SUB-REGION, UGANDA

Low input pastoral production systems rely exclusively on natural forage resources in space and time. Information on the abundance and diversity of such pastures is vital in improving livestock production and managing the biodiversity of grazing landscapes. This study documented grass and browse forage species utilised in pastoral Karamoja, and determined their relative abundance by district, season and grazing land cover. Up to 65 grass and 110 browse species were utilised in Karamoja Sub-region. In situ assessments revealed that Chloris, Hyparrhennia, Sporobolus, Pennisetum, Aristida, Cynodon, Eragrostis, Setaria, and Panicum grasses had higher relative abundance. Triumfetta annua, Indigofera erecta, Acacia drepanolobium, Grewia holstii, Acacia kirkii, Acacia mellifera, Acacia tortolis, Maerua pseudopetalosa, Acacia oerfota, and Ocimmum canum woody species were the most abundant. From the community assessment, Hyparrhennia, Chloris, Panicum, Bracharia, Eragrostis, and Setaria grasses and Acacia mellifera, Cadaba farinose, Acacia oerfota, Acacia drepanolobium, Caparis tormentosa, Maerua pseudopetalosa and Hisbiscus micrantha woody plants were identified as the most abundant among the grazing land cover. The grass and browse forage species varied by season, location, and land cover type. The study also found detailed local knowledge of grass and browse forage species in the community. This study has shown the existence of high diversity among grass and browse forage species with differentiated relative abundance across space and time. This, and the detailed communal cultural knowledge, form a basis for the improvement of livestock production as well as biodiversity conservation in Karamoja sub-region.

Determinants of pastoral and agro-pastoral households’ participation in fodder production in Makueni and Kajiado Counties, Kenya

Fodder production has been regarded as one of the suitable strategies for increasing feed availability for enhanced livestock production among pastoral and agro-pastoral communities in the drylands of Kenya. Previous studies indicate that factors determining participation in these practices vary from time to time and from one location to another. This study was conducted to assess the socio-economic and demographic factors influencing households’ participation in fodder production in Makueni and Kajiado Counties. Data was collected from 216 households through interviews using semi-structured questionnaire. Results indicate that gender of household head, education, social/development group membership and access to extension services were the most important factors influencing households’ participation in fodder production. There is need for technical support to the pastoral and agro-pastoral households towards starting and/or joining existing social groups, through which extension and training services can be offered. This would go a long way in enhancing fodder production in the arid and semi-arid lands of Kenya.