Showing papers by "Zemede Asfaw published in 2021"

Ethnobiology Phase VI: Decolonizing Institutions, Projects, and Scholarship

Abstract: Ethnobiology, like many fields, was shaped by early Western imperial efforts to colonize people and lands around the world and extract natural resources. Those legacies and practices persist today and continue to influence the institutions ethnobiologists are a part of, how they carry out research, and their personal beliefs and actions. Various authors have previously outlined five overlapping “phases” of ethnobiology. Here, we argue that ethnobiology should move toward a sixth phase in which scholars and practitioners must actively challenge colonialism, racism, and oppressive structures embedded within their institutions, projects, and themselves. As an international group of ethnobiologists and scholars from allied fields, we identified key topics and priorities at three levels: at the institutional scale, we argue for repatriation/rematriation of biocultural heritage, accessibility of published work, and realignment of priorities to support community-driven research. At the level of projects, we emphasize the need for mutual dialogue, reciprocity, community research self-sufficiency, and research questions that support sovereignty of Indigenous Peoples and Local Communities over lands and waters. Finally, for individual scholars, we support self-reflection on language use, co-authorship, and implicit bias. We advocate for concrete actions at each of these levels to move the field further toward social justice, antiracism, and decolonization.

Genetic diversity of Ethiopian cocoyam (Xanthosoma sagittifolium (L.) Schott) accessions as revealed by morphological traits and SSR markers

Abstract: Cocoyam (Xanthosoma sagittifolium (L.) Schott) is an exotic species from tropical America that is widely cultivated in Ethiopia for its edible cormels and leaves. There is a dearth of information on the genetic diversity of Ethiopian cocoyam. In order to evaluate and select cocoyam germplasm for breeding and conservation, genetic diversity of 100 Ethiopian cocoyam accessions (65 green- and 35 purple- cocoyam) were analyzed using 29 morphological traits (16 qualitative and 13 quantitative) and 12 SSR loci. Two classes of qualitative traits were observed. ANOVA revealed significant variation in 11 (84.6%) of the 13 studied quantitative traits. The SSR marker analysis showed high genetic diversity. A total of 36 alleles were detected with a range of 2 to 5 (average of 3.273) alleles per locus. The average observed heterozygosity (Ho) and expected heterozygosity (He) values across populations were 0.503 and 0.443, respectively. The analysis of molecular variance showed that the variation among populations, among individuals within populations, and within individuals explained 14%, 18%, and 68% of the total variation, respectively. Cluster analysis grouped the accessions irrespective of the collection sites. A dendrogram based on Nei's standard genetic distance grouped the green cocoyam accessions together while the purple cocoyam accessions occupied a separate position within the dendrogram. Significant variation in quantitative traits and the high level of genetic diversity revealed by the SSR markers suggest that diverse cocoyam accessions, probably with multiple lineage, were introduced multiple times, through multiple routes and probably by multiple agents, an hypothesis that needs futher testing and analyis. The crop, therefore, needs more research efforts commensurate with its economic and social values than it has been accorded thus far. Further study is recommended to clarify the taxonomic status of Ethiopian cocoyam accesions and to trace their evolutionary relationships with Xanthosoma species elsewhere.

Farmers’ management of potato (Solanum tuberosum L.) late blight (Phytophtora infestans (Mont.) de Bary) and sprouting in Shashemene and West Shewa districts, Ethiopia

Abstract: Potato is a potential crop for enabling smallholder farmers to attain food security. However, it is underutilized in Ethiopia due to late blight occurrences and management of sprouting. Understandi...

Prevalence and impacts of fall army worms (Spodoptera frugiperda) on maize (Zea mays) production and productivity in Ethiopia

Abstract: Maize is a key determinant of food security, mainly grown as subsistence in Ethiopia. It was introduced to Ethiopia in 1600’s from Mexico. Food security of Ethiopia is threatened from time to time due to crop diseases and pests. One of these is fall armyworms (Spodoptera frugiperda, J.E Smith; lepdoptera, Noctudea), which is a recently arrived American origin insect pest. As best contributor of Ethiopian economy and social development, maize is being seriously threatened by fall armyworms (FAWs). Maize production stands second in Ethiopia (20.2%) next to teff (34.2%) in terms of the land allotted. However, in terms of productivity maize stands first (45.5%) in relation to teff (29.9%), sorghum (27.2%), and wheat (26.2%). The productivity of maize is suppressed by FAW infestation very significantly (P≤ 0.05) in the previous three years after its arrival to Ethiopia in 2017. The rate of infestation ranges from 1.7 - 34.5% in the past three successive years. According to our results, maize infested by FAW in the past three successive years at regional states levels is shown to devastate produces up to 71%, with the four top infested regions being Gambella (70.4%), Afar (61.6%), Benshangul Gumuz (11.8%), and SNNPRS (10.7%). Health and environmental risks associated with the use of synthetic pesticide chemicals are very profound; hence, environmentally friendly organic based controlling methods of pests with minimum risks such as the use of botanicals, and biological controls are strongly recommended. Key words: Fall armyworm, pest, Ethiopia, maize, productivity.

Genetic diversity analysis of Lima bean (Phaseolus lunatus L.) Landrace from Ethiopia as reveled by ISSR marker

Abstract: Lima bean (Phaseolus lunatus L.) is one of the five most important legume crops from the genus Phaseolus though it is one of the neglected crops in Ethiopia. There is no national breeding program for its improvement. As it is true for all crops, understanding the genetic diversity of Lima bean is useful for its improvement and sustainable use. Therefore, the objective of the current study was to investigate genetic diversity of Lima bean landrace collected in Ethiopia using eight issr markers. A total of 96 landrace were collected from five administrative zones of Ethiopia from which 106 clear bands were detected. About 95 (88.7%) of the bands were polymorphic. The genetic diversity analyses result revealed that landrace collected from West Wellega showed the highest (0.1864) genetic diversity. amova demonstrated highly significant (P=0.00) genetic diversity among and within populations. A considerable proportion (66%) of the total genetic diversity was distributed among populations and 34% within populations. In addition, the calculated Fst value was high (Fst = 0.66), associated with a low gene flow value (Nm=0.27) indicating lower differentiation of the populations, which, in turn, implied no significant exchange of planting materials among farmers in the studied populations and the nature of the crops that Lima bean is 52% self pollinated crop. upgma, structure and PCoA analysis showed very strong grouping among individuals collected from the same zones and geographically distinct zones. Overall, genetic diversity achieved from this study could be used as pioneer information about the existing genetic resource for future Lima bean conservation and improvement strategy in Ethiopia.

Species composition, structure, regeneration and management status of Jorgo-Wato Forest in west Wollega, Ethiopia

Abstract: Species composition, structure, regeneration, and management status of Jorgo-Wato Forest (JWF) was studied. Number of individuals, diameter at breast height (dbh) and height of woody species (dbh ≥ 2.5 cm) were counted and measured in each plot. Group discussions with local farmers residing around JWF were carried out to understand the management of the JWF. Forest structural attributes were computed using descriptive statistics; correlation was used to assess relationships between the structural variables. A total of 4313 individuals (dbh ≥ 2.5 cm) with a density of 1477 ha−1 were recorded, the number of species and individuals decreasing with increasing dbh classes. Species with the highest Importance Value Index (IVI) were Pouteria adolfi-friedericii (37.7), Syzygium guineense subsp. afromontanum (23.6), Dracaena afromontana (20.5), Chionanthus mildbraedii (15.9), and Croton macrostachyus (12.3). Overall distribution of woody plants across size classes exhibited a reverse J-pattern, suggesting a healthy population structure and good regeneration. Nevertheless, some species were not represented in smaller diameter classes, including juvenile phases, which indicate a lack of regeneration. For these species, monitoring and enrichment planting would be necessary, along with curbing illegal cutting and coffee farming in the natural forest. Management interventions in the JWF need to consider livelihood options and to respect the rights of local communities

Ethnobotany of an indigenous tree Piliostigma thonningii (Schumach.) Milne-Redh. (Fabaceae) in the arid and semi-arid areas of South Omo Zone, southern Ethiopia.

Abstract: BACKGROUND Trees are important components of terrestrial ecosystems; they provide ecological, economic, and cultural services to humans. There is an urgent need for undertaking ethnobotanical investigations and documentation on the indigenous botanical knowledge of the local communities of a given area. This study was conducted to assess and document the categoric ethnobotany of Piliostigma thonningii and the associated indigenous knowledge of the local people related to use, management practices, and the threatening factors in the South Omo Zone of southwestern Ethiopia. MATERIALS AND METHODS Six Kebeles were purposively selected from two districts of the zone and a total of 84 respondents were sampled, with consideration of gender, age, and wealth status. Data were collected using structured and semi-structured interviews, field observations, and group discussions. Relevant descriptive statistical methods were used to analyze the data. Ethnobotanical knowledge held by informants were computed using Pearson's chi-square test and direct matrix ranking and pair-wise ranking was used to prioritize the uses according to community preferences and the level of the destructiveness of the reported threats. RESULTS The results showed that P. thonningii provides different functions to people's livelihoods as shade, food, fodder, soil fertility, fuelwood, medicine, rope, multipurpose materials (e.g., Borketa for sitting and head support), huts, beehives, farm implements, chairs, fences, and timber. The indigenous knowledge of local people on the uses of P. thonningii has shown significant (P < 0.05) relationship to age groups (being higher for elderly people). The consumption practice of respondents has significant (P < 0.05) association to the Kebeles, age, and income, with higher value for Hamer, lower aged groups, and low-income families. It provides nutritious animal feed to improve browse intake, survival, and productivity of domestic animals and also improve productivity of farm through amelioration of soil fertility. The status of P. thonningii has been decreasing due to agricultural expansion, collection of the species for firewood, dry fencing, and due to browsing. Respondents' attitude and interest to maintain and conserve the species has shown a significant (P< 0.05) association to gender, wealth, and level of education. Higher interest was observed in men than women, mid-high wealth class households than low income, and people with education than uneducated. CONCLUSIONS This study attempted to provide information on the multiple uses of P. thonningii. Given the key roles of P. thonningii for the people and the environment to improve household food security, agricultural productivity, and income sources and the threats to it, the need to protect it in natural forests and woodlands and optimize its uses in agroforestry systems is high. Serious consideration of this species will ultimately allow households to reap the benefits expected to accrue from it in the arid and semi-arid areas of Ethiopia where plants of this nature are usually rare.

Ethnobotanical Study of Medicinal Plants Used for Human Health Care in Yem Culture, South Ethiopia

Abstract: BackgroundIndigenous or traditional herbal medicine has been widely regarded as a resource for strengthening the health care systems among communities of low income countries including Ethiopia. The Yem people in Ethiopia have deep-rooted and ancient traditional knowledge of managing human ailments and health conditions using medicinal plants (mps). On the other hand, mps and the associated indigenous knowledge are under erosion due to human-induced and natural factors. Therefore, documenting the plant biodiversity along with the associated indigenous knowledge is of urgent task for conservation. MethodsThis study was conducted in April, 2013, October, 2016 and July, 2016 with the objective of documenting traditional mps in different land uses that are used for treating human ailments. Ethnobotanical data were collected from 69 informants that were selected by stratified random sampling and purposive sampling. Vegetation data were obtained from 30, 30x30 m quadrats. Ethnobotanical data were analysed using paired ranking, Informant consensus factor and Fidelity Level index. ResultsAbout 213 medicinal plant species that are used for treating 117 human ailments were recorded. ICF calculated depicted a highest ICF value of 0.82 for Gastrointestinal & Visceral organs ailments. Haplocarpha rueppellii, Carduus schimperi and Inula confortiflora each 100%, Maesa lanceolata 80% and Rumex abyssinicus 75%. Vegetation analysis showed three plant communities.ConclusionThe Yem people have rich traditional knowledge of utilising plants side by side with the mainstream biomedical system for maintaining human health care.

Medicinal Plant Composition, Distribution, Usage and Conservation Status in Nole Kaba District, West Wollega, West Ethiopia

Abstract: BackgroundMany Ethiopians have practiced and still practice home-based medications using various medicinal plants. This research was aimed to study the composition, distribution, and usage and conservation status of medicinal plants in the Nole Kaba District. MethodsData were gathered through semi-structured interviews, group discussions, and field observations. The analysis employed descriptive statistics and quantitative indices including Factor of Informant Consensus (Fic), Fidelity Level (FL), and Sorenson’s Similarity.ResultsOne hundred sixty-two medicinal plants that belong to 65 families, and 135 genera were documented for use in the treatment of 45 human and 31 animal health problems. The growth forms that comprise high proportions of the medicinal flora were herbs (76, 46.9%) and shrubs (45, 27.8%). Most of the species were distributed in forests and farmlands. Ehretia cymosa (FL = 100%), Pentas schimperiana (FL = 100%), Buddleja polystachya (FL = 100%) Schefflera abyssinica (FL = 100%) and Loxogramme abyssinica (FL = 94%) were among medicinal plants showing high informant consensus. Pairwise comparisons identified the expansion of agriculture, deforestation, and over-grazing as principal threats to most medicinal plants.ConclusionsMedicinal plants showing high informant consensus are recommended for further evaluation of efficacy, safety, and other product quality requirements. Medicinal plants such as Echinops longisetus, Ocimum urticifolium, Pentas schimperiana, Securidaca longepedunculata and Warburgia ugandensis are threatened mainly due to over exploitation. These and other similarly affected species should be given top priority for in-situ and ex-situ conservation jointly by the community, the relevant administrative bodies, and development partners.