The Social and Economic Significance of Natural Gum and Resin in the Woodlands of South Omo Zone, Southern Ethiopia

*e social, economic, and ecological role of woodlands forests in dry and lowland areas are more imperative than anywhere else. Most of the dry lands of Ethiopia host woodlands that produce various commercial gum-resin products.*e objective of this study was to investigate the social and economic importance of commercial gum-resin products focusing on their roles in the local livelihoods. Four kebeles, namely, Luka and Enchete from Bena-Tsemay district, and Erbore and Asele from Hamer district of South Omo Zone, were purposively selected for the collection of socioeconomic data. Semistructured questionnaire and checklists were used for households and key informant interviews and focus group discussions, respectively. In addition, market assessments and field observation were conducted to collect the primary data and supplemented with secondary data. A total of 80 households were randomly selected for one-to-one interviews from the total number of 425 households in the selected kebeles. A total of 10 key informant interviews with elders, forestry experts, local merchants, and enterprise members involved in gum-resins marketing and 4 focus group discussions with 12 members including men, women, and youth were conducted. Simple descriptive statistical tools were used for the data analysis. *e results of the study showed that the mean annual income earned from the sale of gumresins was 5670 and 4571 ETB per household at Bena-Tsemay and Hamer study sites, respectively. About 84% of the respondents indicated that gum-resin collection was the simplest and fastest means to earn income for school children and women. Gum and resin collection was the third most important livelihood option in the study area following animal husbandry and crop and honey production. *e majority (84%) of respondents recognized the income made from gum-resin products as a safety net during recurring famine eras. Moreover, respondents recognized the benefit of gum arabic as food during famine time, as chewing gum, and as nutritious fodder. It was also used as folk medicine for both human and livestock diseases. Communities used this resource as a constituent to treat eye and skin infections, bleeding, wounds, ulcers, stomachache, gastrointestinal infections, etc. In addition, 88.33% of shrubs/trees were used as source of cash income for local communities and 11.67% as fodder for animal husbandry. Despite this significance, various constraints hindered the utilization of the resource in the study area, and these included lack of appropriate tapping techniques, market access, market information, cooperatives, infrastructure facilities, and appropriate institutions as well as poor local communities’ awareness of landmanagement.*e present investigation has provided valuable information for overcoming the major constraints by devising strategies to maximize gum-resin production and commercialization in the study area.


Introduction
Woodlands and forest's social, economic, and biological role in both dry and lowland areas are more imperative than in any rangelands. Agroforestry parklands and trees/shrubs outside forests play decisive roles in the livelihood of societies in Africa's woodlands [1]. For Ethiopia, there are many social, economic, ecological, and political details to enact sustainable management of its woodland forests. For example, processed and/or value-added commercialization of gum-resins produced from woodland forests would give access to extra income for the arid and/or woodland prone communities, in addition to the regional and national economy at large [2]. Discussion on the significance of woodlands and dry forests is highly dependent on lessons from the moist tropics, with scanty information on woodlands that cover large areas and host hundreds of millions of Africans [1,3,4]. Current studies reveal that development towards combination of woodland forests has been hindered partly by a lack of practically based information on their socioeconomic significance [1,5].
About 75% of the Ethiopian total land mass was represented by dryland forests [6], which host woodlands that produce various commercial gum-resin products [2]. An annual production potential of 270,000 tons of gum-resins from more than 3.5 million hectares of woodlands and bushlands was estimated in Ethiopia [5]. Gum-resins are the most widely used and traded nontimber forest products (NTFPs) other than items consumed directly as food, fodder, and medicine [7]. ey are important for various purposes in consumer goods such as detergents, cosmetics, pharmaceuticals, perfumes, sweet food products, soft drinks, hard drinks, and insecticides [8].
In addition, as stated by [9], gum-resins are used in indigenous medicines for the management of different ailments such as wounds, arthritis, fractures, obesity, parasitic infection, and gastrointestinal diseases. Income at household level is significant. For example, the estimated income from gum-resin business is threefold higher than the contributions of crops [10]. Consequently, the economic importance of these resources as a government source of valuable foreign currency has been widely realized in Ethiopia [11]. Employment opportunities have also been generated throughout the year; for instance, Boswellia products subsector recruits several employees for activities such as tapping and collection, transportation, processing, marketing, and guarding of storage facilities [12]. Additionally, production of NTFPs helps to promote a better consolidation of dry woodlands and, thus, improves economic enhancement along with ecological maintenance [2].
Despite the increasing realization of the social, economic, cultural, environmental, and other roles of gumresin products worldwide, their critical significance has not been yet recognized and acknowledged generally in the country and specifically in South Omo Zone, South Ethiopia.
is is due to, as stated by [13], the absence of information on the social, economic, and cultural importance. Communities in the study area pursue a pastoralist style of life strategy, whose sources of income are mainly relying on livestock rearing and crop and natural honey production [14]. Drought is one of the major reasons for natural resource degradation. For example, as stated by [15], compositions of gum-resin bearing species are facing challenges of degradation due to recurrent droughts, thereby leading to a decline in productivity. In addition, fuel wood collection and charcoal making are considered as alternative income sources especially for those who live around rural towns.
is action led to minimizing the gum-resin productivity and loss of genetic diversity of the species [16]. us, the development of sustainable management options for this dry land resource is required for the benefit of local communities in particular and national and international communities in general. e socioeconomic significance through value-added commercialization of gum-resins is considered as the basis for sustainable production and marketing of the products. erefore, this study aims to assess the social and economic role of gum-resin products and identify main constraints on the production, marketing, and/or commercialization of gum-resin products in the woodlands of South Omo Zone, Southern Ethiopia.

Study Area Description.
is study was carried out in semiarid woodlands of Bena-Tsemay and Hamer districts of South Omo Zone, located in Southwestern parts of Ethiopia. e zone is unique in that it comprises 16 distinct ethnic groups within 8 districts of the zone in the country and is known as the heart of cultural diversity. e study area is geographically located between 36°09′25″E and 37°04′12″E longitude and 4°30′18″N and 5°44′06″N latitude ( Figure 1). e total population of the study districts is 62,362 and 59,572, inhabiting 3754 km 2 and 5742 km 2 of total area of Bena-Tsemay and Hamer districts, respectively. e elevation of the area ranges between 371 and 2084 m.a.s.l in Bena-Tsemay and Hamer districts, respectively [14,17]. e districts have a bimodal rainfall pattern with an average annual rainfall of 1400 mm and 764 mm in Bena-Tsemay and Hamer districts, respectively [17,18]. e annual average minimum and maximum temperatures are in the range of 16°C-27°C and 40°C-41°C for Bena-Tsemay and Hamer districts, respectively [19]. Eutric Fluvisols are the dominant soil types in grasslands while Eutric and Chromic Cambisols are dominant in mountains areas [20].
Most of the households in the selected districts depend on livestock rearing, gum-resins collection, and natural honey harvesting for living as well as for generating income. In the study districts, gum-resin bearing tree species are the predominant vegetation types [14,21].

Sampling, Data Collection, and Analysis.
For this study, both qualitative and quantitative approach were used. Multistage random sampling techniques were used. Firstly, two districts, Bena-Tsemay and Hamer, that are adjacent to the forest resources (i.e., comprising the natural gum-resin bearing tree/shrub species) were purposively identified. Secondly, following the same fashion, four kebeles, namely, Luka and Enchete from Bena-Tsemay district, and Erbore and Asele from Hamer district, were purposively selected based on their dependence on gum-resin production and marketing. A total number of 425 household heads, who lived permanently in the selected sample kebeles, were recorded, and from these, 80 households (20 from each kebele) were randomly selected and used for face-to-face interviews.
Semistructured questionnaire was used for household survey and key informant interviews and focus group discussions were conducted using a checklist. A total of 10 key informants including elders, forestry experts, local merchants, and enterprise members involved in gum-resin marketing and 4 focus group discussions (one in each kebele, containing 12 individuals including men, women, and youth) were conducted. Questions on the socioeconomic characteristics, gum-resin products collection and handling, processing, and marketing practices were the nucleus of the questionnaire. e main challenges for the production and marketing of these products and their main livelihood contributions were also important concerns of this research. e collected primary data was complimented with field observation and secondary data sources.

Data Analysis.
Both qualitative and quantitative data analysis methods were used, summarized, and analyzed through employing statistical package for social science (SPSS version 20). Descriptive statistics was employed to describe the various variables.

Socioeconomic Characteristics and Main Livelihood Options of Local Communities.
e majority of the respondents (86%) were male-headed households, and their ages ranged between 16 and 40 years (Table 1). With regard to the level of education, majority of respondents 60% were illiterate, followed by 25% who attended elementary school up to grades between 5 and 8 ( Table 1).

Household's Livelihood Options and eir Income Contribution.
e main livelihood options for the respondents were livestock production, crop production and natural honey harvesting, gum-resin collection, and collection of wild edible fruits in descending order of importance. In terms of income sources, live animals' sale accounted for 33.75% of the total household's income, followed by crop/natural honey production (31.25%) and gum-resin sale (21.25%). e contribution of wild edible fruits to the household's income was about 13.75% (Table 2).

Trees and Shrub Species that Bear Gum-Resin Products and
eir Use in South Omo Woodlands. Several gum-resin products such as gum, gum gumero, gum arabic, gum talha, incense (produced from B. neglecta and locally named as "tikur etan," meaning black incense), myrrh, and opoponax were collected in the study area from different trees/shrubs in South Omo ( Figure 2; Table 3). ese products were collected for local subsistence use and for income generation. Acacia species such as A. mellifera, A. mubica, A. senegal, A. seyal, and A. sterculia are the main tree species for collection of gum. Besides, gum-resins from Commiphora species such as C. africana, C. myrrh, C. boranensis, C. bruceae, and C. schimperi are collected and used in study area, and their products are locally named as "nech etan" (meaning white incense).
Respondents recognized the purpose of gum arabic as food during famine time, as chewing gum, and as nutritious fodder. Communities have long experience of considering it as folk medicine both for human and livestock diseases. ey used this resource as a constituent to treat eye and skin infections, bleeding, wounds, ulcers, stomachache, gastrointestinal infections, etc. (Table 3).
Moreover, pastoralists in both of the districts also used the aroma of frankincense from B. neglecta and myrrh from C. myrrh as fumigants during religious and various cultural occasions. Products such as incense from C. myrrh and C. boranensis were used as candles in holidays and festivals. Colors from the resin of C. africana, C. boranensis, and C. bruceae mainly in schools have been prepared by elder people from the services of these gumresin bearing species; shade for livestock and wind barriers against the blowing storms are invaluable.
In the study districts, 100% of the identified/encountered trees/shrubs species were used as fodder for animal husbandry and 88.33% used as source of cash income for local communities. From the identified tree species, solely one (8.33%) species (Acacia species) was used as food during famine time (Table 4).

Gum-Resin Collection and Marketing in South Omo Zone.
In the study area, gum-resin products collection was ordinarily performed from communal stands of woodlands, which indicated that the resources are not yet individually owned and domesticated by the local people. Collection of gum-resin products was done by manual labor after oozing naturally, and thus it is a labor-intensive traditional method of tapping ( Figure 3) (Table 5). e majority of the respondents (75%) indicated the absence of any scientific specific tapping technique (Table 6). However, recent specific and improved tapping technologies that help to increase return and productivities of gum-resins were highly appreciated by the society. Harvesting, transporting, and selling of gum-resin products are normally done by women and children. However, during free times, all members of the household were involved in the collection of gum and resin, irrespective of either age or sex, and distributed it to the nearby market. In contrary, gum-resin products collection is considered as a primary occupation, for those who have limited options (i.e., shortage of farmlands and few livestock numbers). ese members of the local community bring substantial number of products into local markets and/ or pass them to the intermediaries for earning better prices.

Contribution of Gum-Resin Production and Marketing
to Rural Livelihood. Gum-resin production has a great contribution to rural livelihood, including income generation; being safety net; use as traditional medicine, food, and fodder; employment opportunities; soil and water conservation; biodiversity conservation; and other cultural contributions. As seen in Table 5, households collect on average annually 360, 380, and 200 kg of gum arabic , frankincense, and myrrh, respectively, in Bena Tsemay and 394, 360, and 197 kg of gum arabic, frankincense, and myrrh, respectively, in Hamer district. It indicates the significant income contribution of gum-resin production in the study area. is study revealed the average annual income of about 5670 and 4571 ETB (Ethiopian Birr) from the sale of gum-resin products at the household level at Bena-Tsemay and Hamer study sites, respectively (Table 7). e result revealed that the household food purchase was mainly fulfilled from the income obtained from the sale of gum-resin products and that 84% of respondents recognized the income made from gum-resin products as a safety net during recurring famine eras (Table 6). In addition, this business creates a peculiar advantage for the household to access cash income following main and short rain seasons. Moreover, majority of respondents (84%) considered gumresin harvesting as the simplest and fastest means to earn income for school children and women (Table 6). e respondents also believed that there were improved social          International Journal of Forestry Research interactions due to production and marketing of the resource.

Respondents' Perception of Future Gum-Resin Resources Management and Commercialization in the Study Area.
About 97.4% of the sample respondents realized the potential of the natural gum-resin bearing tree/shrub species in the study area. e prevailing multiarray contribution of these products induce the majority of respondents (92.2%) to have a growing interest in being actively involved in gumresin collection practices, while the remaining respondents (7.8%) still showed lack of interest in any of gum-resin collection practices (Table 6). Moreover, the majority of the respondents (62.6%) used gum-resin products for local use, and 91.5% of them collected the product for sale. Some of the respondents (33.0%) tried to establish a cooperative association in order to encourage others to be part of the business; however, they were unsuccessful and disorganized ( Table 6).

Challenges and Constraints Affecting Gum-Resin
Production. Several constraints that potentially hinder the possible utilization of these resources have been identified as indicated by key informants and through focus group discussions. ese include lack of infrastructure facilities, appropriate institutions, capacity, suitable tapping technologies, and cooperatives and difficulty in accessing market, market information, and fair market prices. e key informants and focus group also asserted that the poor local communities' awareness of maximizing utilization and marketing of woodlands resources and gum-resin resources in particular, changing the woodlands to farmlands, overgrazing, drought, and bush encroachment are considered as underlying problems.

Socioeconomic Characteristics and Main Livelihood Options of Local Communities.
Majority of the respondents (60%) of pastoralists were illiterate and unable to read and write, and only 7.5% completed formal education. e result obtained in this study was in line with the previous studies done by [17,22] in Hamer and Bena-Tsemay, South Omo, respectively, but unlike those in Mexico, Kenya, and Kwara State (Nigeria), as reported by different authors [23][24][25], where most of the people had elementary education. e high level of illiteracy was attributed to the lack of participation in learning, as most of the time was spent in rearing livestock. However, at present, both governmental and nongovernmental organizations are promoting education, and astonishing change has been seen around the districts. e first livelihood option for the local communities has been animal rearing, and it is also the largest income source (33.75%). e result obtained in the current study validated what has been reported by different authors in different pastoral areas of Ethiopia [26][27][28]. In addition to animal husbandry, the woodland forests of the districts are the source of several products including gum-resins, honey, fuel wood, hand crafts, and construction materials, which are use for their subsistence and cash income and are imperative for household livelihoods. Hence, sale of gum-resin is the third livelihood option for the households next to sale of crops and honey. e findings obtained from this study on the sale of gum-resin agreed with what [10,[29][30][31] reported from Liban, Southeast Ethiopia, and Hamer and Bena-Tsemay district, Southwestern Ethiopia, respectively. Similarly, like societies in South Omo, societies living in the lowland parts of Tigray [32] and Amhara, North Gondar Zone [33], produce gum-resins for both home consumption and sale.

Gum-Resin Products and
eir Uses. Collection and selling of tree/shrub-based gum-resin products were the third predominant livelihood activities in the area following animal husbandry and crop production. In majority of areas in Ethiopia, gum-resin collection and selling played an important role in the overall socioeconomic conditions of the local communities [27]. Similarly, [10] stated that collection of gum-resins was the main source of livelihoods at Liben district, Somali region. Gum-resin products were mainly collected by school children followed by women in both study areas. is observation was in line with the reports of [34] that children and women are the main actors for the collection and selling of gum-resin products in Tigray region. Moreover, numerous studies from different parts of Ethiopia [29,31,[35][36][37] reported gum-resin production and/or extraction as local income source in woodland forest areas of Ethiopia. e estimated average annual income of gum-resin (5670 and 4571 ETB at Bena-Tsemay and Hamer study sites, respectively) was comparable to that from the natural gum-resin bearing species in Ethiopia [2,29,35] with mean annual income of Borana, Metema, and Somali study sites, respectively. In this study, household communities have been highly involved in the harvesting (63%) and sale of gum-resin (92%), and relatively fewer intervention activities have been taken place concerning the initiation and mobilization of societies to start business as cooperative associations (33%) than those reported in most of these previous studies conducted in Borana, Metema, and Somali study sites, respectively. e societies in South Omo have never been trained in tapping and collection methods and/or techniques and are working with disorganized and fragmented youth associations. Hence, the collection process has been limited to collecting only those natural exudates. Societies that inhabit the study area often utilize this resource for numerous purposes similar to the observation of [10,33] in eastern and northern parts of Ethiopia, respectively. Fodder, income earning alternative, folk medicine, hygiene, and several cultural practices are considered as primary purposes of the resource in the study area. is may indicate the deep curiosity of the societies about gum-resin bearing tree/shrub species.
Among the local uses of gum-resin bearing tree species, fodder provision was the most important one followed by cash income. Woodland forest and/or gum-resin trees/ shrubs species are the only source of forage for animal International Journal of Forestry Research husbandry in the area, implying that woodland forests are used as rangelands or forage. Following fodder and cash income generation, the woodland gum-resin bearing trees/ shrubs are used for fumigation and chewing gum and as food during famine periods with descending order of importance. e current results from this study on local use of woodland gum-resin trees/shrubs are comparable with the previous studies [2,30,38] reporting on selected district, zone, and regions and national economy of Ethiopia, respectively. e majority of the respondents adopt the attitude of keeping the woodlands as rangelands through skillfully exploiting and installing integrated and organized gum-resin production system. With the worldwide growing demand for gum-resin products as imperative business commodities, vast not yet exploited tree/shrub gum-resin species found in the study area ensure the potential income alternatives particularly for the local community and generally to the country's export potential.

Conclusions
is study assessed the economic and social significance of gum-resin bearing tree species in the woodlands of South Omo Zone. Gum and resin collection was the third most important livelihood option for the local communities in the study area following livestock rearing and crop production. It is also the third most important income source for the communities. ese findings have highlighted the vital importance of gumresin for livelihoods improvement of local pastoral societies. A mean income of 5670 and 4571 ETB was gained annually per household at Bena-Tsemay and Hamer study sites, respectively. Moreover, gum-resin has high social and cultural value for the society. Its contributions include income generation; being safety net; use as traditional medicine, food, and fodder; employment opportunities; soil and water conservation; biodiversity conservation; and other cultural contributions. Besides the economic and social significance, gum-resin producing tree/shrub species contribute to the sustainability of dryland ecosystems. Despite these benefits, various constraints such as lack of appropriate tapping techniques, market access, cooperatives, infrastructure facilities, and appropriate institutions as well as poor local communities' awareness of land management hindered the utilization of gum-resin products in the area, while such significant role of gum-resin has to be given proper consideration during policy making of land use and policy implementations.
us, this study recommends sustainable planning and management strategies for maximizing gum-resin utilization and marketing by overcoming the identified challenges. In addition, further study on supportable preservation and wise utilization of woodlands for potential production of gum-resin resources from bearing species is recommended.

Data Availability
e data used to support the findings of this study are available in the tables of this article as well as in supplementary materials.

Conflicts of Interest
e authors declare no conflicts of interest regarding the publication of this work.

Acknowledgments
is study was sponsored by the Pastoral, Agro-pastoral, and Emerging Regions Directorate of Ethiopian Institute of Agricultural Research (EIAR). e authors are grateful to both districts' experts for their unreserved support during data collection and fieldwork. e authors are grateful to the local community for their willingness to directly involve themselves and provide invaluable information during data collection period.

Supplementary Materials
ere is respondent background data based on sample size (n � 80) (Supplementary Table 8) and research questions depending on respondent answers (n � 80) (Supplementary Table 9). Hence, data for monthly income from sale of gumresin includes only 21.25% of respondents/households (HHs), i.e., n � 17 out of 80 HHs in the study area (field survey (2018/19)). Moreover, the summary of data on gumresin bearing tree species and their local use according to the respondent answers (Supplementary Table 10) used to support the findings of this study is available in editable version table files. (Supplementary Materials)