Biography

Professor Ayana Angassa Abdeta a former staff member of the School of Animal and Range Sciences at Hawassa University and currently working as an Associate Professor at the Botswana University of Agriculture and Natural Resources, Department of Range and Forest Resources. He obtained his PhD. in Rangeland Ecology from Norwegian University of Life Sciences, Norway in 2007. His professional interest focuses on Rangeland Ecology and Management, Dryland Ecosystem Ecology, Pastoral/Agro-pastoral systems, Range-livestock systems, Environment and Development Studies, Land Use Systems, Determinants of African Savannas, Environmental History, Natural Resource Management, Effects of Drought and Drought Management Policy, Restoration of Degraded Lands, Community-based Knowledge, Role of Traditional Institution in Natural Resource Management, Bush Encroachment/invasive Plants, Fire Ecology, Human Vulnerability and Adaptation to Climate Change, Food Security. His working experience includes work as Manager of Borana Cattle Breed Conservation and Improvement Ranch in Borana, Southern Ethiopia, Acting Head, Lecturer and Assistant Professor at Debub University, Ethiopia, Research Fellow at Norwegian University of Life Sciences, Norway, Assistant Scientist at the University of Oslo, Norway, Assistant Professor, Associate Professor and Head at Hawassa University, Ethiopia, and Post Doctoral Researcher at the University of Hohenheim, Stuttgart, Germany and the University of Cologne, Germany. He also received grants for research projects. He supervised 11 MSc and 8 Ph.D. and several external Masters Students. He also worked as a coordinator in many specific scientific projects. He is a professional member of the Ethiopia Society of Animal Production, Pastoral Network in Ethiopia, Ethiopian Educated in Norway, and Teachers Association at Hawassa University. He is also a member of many committee assignments. He also participated in national and international courses, workshops, conferences, and study tours. He has 32 publications in journals, 7 articles in process, and 16 proceedings, book chapter, conference presentation, and other contributions as author/co-author. He is also serving as a reviewer in a number of journals. He is a member of the editorial board in the Science Technology and Arts Research journal (Wollega University).

Area of Interest:

Earth Science and Geography

100%

Rangeland Ecology

62%

Land Use Systems

90%

Natural Resource Management

75%

Climate Change

55%

Research Publications in Numbers

Books
0

Chapters
0

Articles
41

Abstracts
0

Selected Publications

Tilahun, M., A. Angassa, A. Abebe and A. Mengistu, 2016. Perception and attitude of pastoralists on the use and conservation of rangeland resources in Afar region, Ethiopia. Ecol. Processes, Vol. 5. 10.1186/s13717-016-0062-4.
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Linstadter, A., Z. Bora, A. Tolera and A. Angassa, 2016. The more invasive the less facilitative? Canopy effects of encroaching and non-encroaching acacia species on understory vegetation in an East African savanna landscape. J. Veg. Sci., 19: 291-303.
Feyisa, K., S. Beyene, B. Megersa, M.Y. Said and A. Angassa, 2016. Allometric equations for predicting above-ground biomass of selected woody species to estimate carbon in east African rangelands. Agrofor. Syst., 10.1007/s10457-016-9997-9.
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Berhanu, Y., L. Negatu, F. Beyene and A. Angassa, 2016. Impact of resettlement on vegetation status and rangeland condition in southwestern Ethiopia. Afr. J. Agric. Res., 11: 533-542.
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Angassa, A., 2016. Vegetation responses to site, elevation and land use in semi-arid rangeland of Southern Ethiopia. Afr. J. Agric. Res., 11: 379-391.
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Abate, T. and A. Angassa, 2016. Conversion of savanna rangelands to bush dominated landscape in Borana, southern Ethiopia. Ecol. Processes, Vol. 5. 10.1186/s13717-016-0049-1.
CrossRef | PubMed | Direct Link |
Asrat, M., A. Angassa and A. Abebe, 2015. The effects of area enclosures on rangeland condition, herbaceous biomass and nutritional quality in Southeast Ethiopia. Sci. Technol. Arts Res. J., 4: 79-88.
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Megersa, B., A. Markemann, A. Angassa, J.O. Ogutu, H.P. Piepho and A.V. Zarate, 2014. Livestock diversification: An adaptive strategy to climate and rangeland ecosystem changes in Southern Ethiopia. Hum. Ecol., 42: 509-520.
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Megersa, B., A. Markemann, A. Angassa, J.O. Ogutu, H.P Piepho and A.V. Zarate, 2014. Impacts of climate change and variability on cattle production in Southern Ethiopia: Perceptions and empirical evidence. Agric. Syst., 130: 23-34.
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Megersa, B., A. Markemann, A. Angassa and A.V. Zarate, 2014. The role of livestock diversification in ensuring household food security under a changing climate in Borana, Ethiopia. Food Secur., 6: 15-28.
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Angassa, A., 2014. Effects of grazing intensity and bush encroachment on herbaceous species and rangeland condition in Southern Ethiopia. Land Degrad. Dev., 25: 438-451.
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Yonas, B., F. Beyene, L. Negatu and A. Abdeta, 2013. Influence of resettlement on pastoral land use and local livelihoods in southwest Ethiopia. Trop. Subtrop. Agroecosyst., 16: 103-117.
Direct Link |
Teka, H., I.C. Madakadze, A. Hassen and A. Angassa, 2013. Mineral lick-centered land-use and its effects on herbaceous vegetation in Southern Ethiopia. Afr. J. Agric., 8: 5872-5883.
Direct Link |
Keba, H.T., I.C. Madakadze, A. Angassa and A. Hassen, 2013. Nutritive value of grasses in semi-arid rangelands of Ethiopia: Local experience based herbage preference evaluation versus laboratory analysis. J. Anim. Sci., 26: 366-377.
CrossRef | PubMed | Direct Link |
Angassa, A. and G. Oba, 2013. Cattle herd vulnerability to rainfall variability: Responses to two management scenarios in Southern Ethiopia. Trop. Anim. Health Prod., 45: 715-721.
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Teshome,T., R.A.J. Solomon, N. Sileshi, W. Tadesse, A. Angassa. 2012. The effect of environmental variables on woody plant species distribution: The case of Boke Salt Valley landscape in Borana, Ethiopia. J. Nature Conserv., 24: 1-11.
Teka, H., I.C. Madakadze, A. Angassa and A. Hassen, 2012. Effect of seasonal variation on the nutritional quality of key herbaceous species in semi-arid areas of Borana, Ethiopia. Indian J. Anim. Nutr., 29: 324-332.
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Osterle, N., A. Angassa, A. Tadesse, A. Ebro, J. Sauerborn and A.C. Treydte, 2012. Crop-livestock farming systems varying with different altitudes in southern Ethiopia. Sci. Technol. Arts Res. J., 1: 1-13.
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Dime, T.T., A. Angassa, S. Nemomissa and T. Woldemariam, 2012. Savanna land use and its effect on woody plant species diversity in Borana, southern Ethiopia. Sci. Technol. Arts Res. J., 1: 43-52.
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Angassa, Ay., G. Oba and N.C. Stenseth, 2012. Community-based knowledge of indigenous vegetation in arid African landscapes. Consilience: J. Sustainable Deve., 8: 70-85.
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Angassa, A., B. Sheleme, G. Oba, A.C. Treydte, A. Linstadter and J. Sauerborn, 2012. Savanna land use and its effect on soil characteristics in southern Ethiopia. J. Arid Environ., 81: 67-76.
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Abdeta, A.A., G. Oba and A. Tolera, 2012. Bush encroachment control demonstrations and management implications on herbaceous species in savannas of southern Ethiopia. Trop. Subtrop. Agroecosyst., 15: 173-185.
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Terefe, B., M. Limenih, A. Gure and A. Angassa, 2011. Impact of Acacia drepanolobium (an invasive woody species) on gum-resin resources and local livelihood in Borana, Southern Ethiopia. Trop. Subtrop. Agroecosyst., 14: 1063-1074.
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Teklu, B., T. Negesse and A. Angassa, 2011. Effect of farming systems on livestock feed resources and feeding systems in Benishangul-Gumuz region, western Ethiopia. Int. Res. J. Agric. Sci,. 1: 20-28.
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Teklu, B., T. Negesse and A. Angassa, 2010. Effects of farming systems on floristic composition, yield and nutrient content of forages at the natural pasture of Assosa zone (Western Ethiopia). Trop. Subtrop. Agroecosyst., 12: 583-592.
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Angassa, A., G. Oba, A.C. Treydte and R.B. Weladji, 2010. Role of traditional enclosures on the diversity of herbaceous vegetation in a semi-arid rangeland, southern Ethiopia. Livestock Res. Rural Dev., Vol. 22, No.9. .
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Angassa, A. and G. Oba, 2010. Effects of grazing pressure, age of enclosures and seasonality on bush cover dynamics and vegetation composition in southern Ethiopia. J. Arid Environ., 74: 111-120.
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Angassa, A. and G. Oba, 2009. Bush encroachment control demonstrations in southern Ethiopia: 1. Woody species survival strategies with implications for herder land management. Afr. J. Ecol., 47: 63-76.
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Oba, G., B. Patrick and A. Angassa, 2008. Participatory monitoring of biodiversity in East African grazing lands. Land Degrad. Dev., 19: 636-648.
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Angassa, A. and G. Oba, 2008. Herder perceptions on impacts of range enclosures, crop farming, fire ban and bush encroachment on the rangelands of borana, Southern Ethiopia. Hum. Ecol., 36: 201-215.
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Angassa, A. and G. Oba, 2008. Effects of management and time on mechanisms of bush encroachment in southern Ethiopia. Afr. J. Ecol., 46: 186-196.
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Angassa, A. and G. Oba, 2007. Relating long-term rainfall variability to cattle population dynamics in communal rangelands and a government ranch in southern Ethiopia. Agric. Syst., 94: 715-725.
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Angassa, A., A. Tolera and A. Belayneh, 2006. The effects of physical environment on the condition of rangelands in Borana. Trop. Grasslands, 40: 33-39.
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Abebe, M.H., G. Oba, A. Angassa and R.B. Weladji, 2006. The role of area enclosures and fallow age in the restoration of plant diversity in Northern Ethiopia. Afr. J. Ecol., 44: 507-514.
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Angassa, A., 2005. The ecological impact of bush encroachment on the yield of grasses in Borana rangeland ecosystem. Afr. J. Ecol., 43: 14-20.
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Angassa, A. and F. Beyene, 2003. Current range condition in southern Ethiopia in relation to traditional management strategies: The perceptions of Borana pastoralists. Trop. Grasslds, 37: 53-59.
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Angassa. A., 2002. The effect of clearing bushes and shrubs on range condition in Borana, Ethiopia. Trop. Grasslands, 36: 69-76.
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Angassa, A. and R.M.T. Baars, 2000. Ecological condition of encroached and non-encroached rangelands in Borana, Ethiopia. Afr. J. Ecol., 38: 321-328.
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