Abstract
Pastoralist societies in dryland areas anticipate the harsh climatic conditions with migration patterns that optimise the use of available forage and watering points. Yet, these traditional institutions are under increasing pressure due to a mounting population, encroaching of traditional grazing areas by sedentary agriculture and restrictions on transboundary movements. Indeed, the last decades witnessed an intensified use of these rangelands and the threat of overgrazing, a major cause of land degradation, should be taken seriously. This also motivates the current study where we analyse the relationship between grazing patterns and land degradation in the nomadic pastoralist areas of the Afar Region, Ethiopia. However, this is not an easy task because trekking patterns and concentrated grazing areas are not known in sufficient detail to engage in a fully spatial-temporal analysis. Therefore, we simulate the effect of migration by analysing land degradation-overgrazing relationships under various area accessibility scenarios, gradually releasing administrative boundary restrictions for pastoralists from district zone to state level. A grazing supply to demand ratio is applied to analyse the incidence of overgrazing whereas land degradation is estimated using time series analysis of the Rainfall Use Efficiency (RUE). The study shows that fodder shortages at district level in the western Afar are partly compensated at zonal level while the demand-supply ratio at state level is close to one. Significant negative trends in RUE are found in the north-eastern part of the Afar, in isolated pockets along the Awash River and near escarpments with the Highlands. A better understanding of the land degradation-overgrazing relationship requires more information on trekking patterns, including possible visits outside the study area.
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Notes
- 1.
According to the type of trekking patterns pastoralists are called nomadic (irregular movements) or transhumant (regular movements between fixed locations).
- 2.
Afar State consists of 5 administrative zones and 29 woredas. Farmer associations (326) and neighbourhood associations (32) (kebeles) are the most decentralized administrative units.
References
Abule, E., Snyman, H.A. and Smit, G.N. (2007). Rangeland evaluation in the middle Awash valley of Ethiopia: I. Herbaceous vegetation cover. Journal of Arid Environments 70:253–271.
Behnke, R.H. and Abel, N.O.J. (1996). Revisited: The overstocking controversy in semi-arid Africa. World Animal Review 87:3–27.
Biopact. (2007). ICRISAT launches pro-poor biofuels initiative in drylands. Through: http://biopact.com/2007/03/icrisat-launches-pro-poor-biofuels.html
Boudet, G. and Riviere, R. (1968). Emploi pratique des analysis fourrageres pour l‘appreciation des paturages tropicaux. Revue de levage et de medecine veterinaire des pays tropicaux 21(2):227–266.
CSA. (2003). Pastoral Areas Livestock Enumeration, Results for Afar Region. The Central Agricultural Census Commission, Central Statistical Authority, Addis Ababa, Ethiopia.
Cotula, L., Vermeulen, S., Leonard, R. and Keeley, J. (2009). Land Grab or Development Opportunity? Agricultural Investment and International Land Deals in Africa. IIED/FAO/IFAD, London/Rome. ISBN: 978–1–84369–741–1.
Dent, D.L. and Bai, Z.G. (2008). Assessment of land degradation using NASA GIMMS: A case study in Kenya. In: E. Hartemink, A. McBratney and M. de Lourdes Mendonça-Santos (eds.), Digital Soil Mapping with Limited Data. Springer, Netherlands, p. 21. Assessment of Land Degradation Using NASA GIMMS: A Case Study in Kenya, pp. 247–258.
Desta, S. and Coppock, D.L. (2004). Pastoralism under pressure: Tracking system change in southern Ethiopia. Human Ecology 32(4):465–486.
Dodd, J.L. (1994). Desertification and degradation in sub-saharan Africa – the role of livestock. BioScience 44:28–34.
Ellis, J.E. and Swift, D.M. (1988). Stability of African pastoral ecosystems: Alternate paradigms and implications for development. Journal of Range Management 41:450–459.
Geerken, R. and Ilaiwi, M. (2004). Assessment of rangeland degradation and development of a strategy for rehabilitation. Remote Sensing of Environment 90(2004):490–504.
Hall, F., Masek, J. and Collatz, G.J. (2006). Evaluation of ISLSCP initiative II FASIR and GOMMS NDVI products and implications for carbon cycle science. Journal of Geophysical Research 111:D22S08. doi:10.1029/2006JD007438.
Hardin, G. (1968). The tragedy of the commons. Science 163:1243–1248.
Homewood, K. and Rodgers, W.A. (1987). Pastoralism, conservation and the overgrazing controversy. In: D. Anderson and R. Grove (eds.), Conservation in Africa: People, Policies and Practice. Cambridge University Press, Cambridge, 355pp.
Hundie, B. (2006). Property Rights among Afar Pastoralists of Northeastern Ethiopia: Forms, Changes and Conflicts. Presented at Survival of the Commons: Mounting Challenges and New Realities. Eleventh Conference of the International Association for the Study of Common Property, Bali, Indonesia, June 19–23, 2006.
Jama, A., Gibson, Z., Stuth, J., Kaitho, R., Angerer, J. and Marambii, R. (2002). Setting up a livestock early Warning System Monitoring Zone: Site selection, characterization, and sampling for the PHYGROW model. In: Livestock Early Warning Systems for East Africa. Proceedings of the Planning and Evaluation Workshop. Ethiopian Agricultural Research Organization, Addis Ababa, Ethiopia, May 5–7, 2002, pp. 33–39.
Lamprey, H.F. (1983). Pastoralism yesterday and today: The overgrazing controversy. In: F. Bourliere (ed.), Tropical Savannas. Ecosystems of the World. Volume 13. Elsevier, Amsterdam, 730pp.
Le Houérou, H.N. (1984). Rain use-efficiency: A unifying concept in arid-land ecology. Journal of Arid Environments 7:213–247.
Leach, M., Mearns, R. (eds.). (1996). The Lie of the Land: Challenging Received Wisdom on the African Environment. Cambridge University Press, Cambridge, 240pp.
McNaughton, S.J., Oesterheld, M., Frank, D.A. and Williams, K.J. (1989). Ecosystem-level patterns of primary productivity and herbivory in terrestrial habitats. Nature 341:142–144.
Minson, D.J. and McDonald, C.K. (1987). Estimating forage intake from the growth of beef cattle. Tropical Grasslands 21:116–122.
Mitchell, T.D. and Jones, P.D. (2005). An improved method of constructing a database of monthly climate observations and associated high-resolution grids. International Journal of Climatology 25:693 – 712.
Pantuliano, S. and Wekesa, M. (2008). Improving Drought Response in Pastoral Areas of Ethiopia Somali and Afar Regions and Borena Zone of Oromiya Region. Humanitarian Policy GroupOverseas Development Institute, London.
Prince, S.D., Brown de Colstoun, E. and Kravitz, L.L. (1998). Evidence from rain-use efficiencies does not indicate extensive Sahelian desertification. Global Change Biology 4:359–374.
Rass, N. (2006). Policies and Strategies to Address the Vulnerability of Pastoralists in Sub-Saharan Africa. PPLPI Working Paper No. 37. Pro-Poor Livestock Policy Initiative. Food and Agriculture Organization of the United Nations, Rome, Italy.
Rettberg, S. (2008). Der Umgang mit Risiken im Spannungsfeld zwischen Konflikten und Nahrungskrisen. Eine politisch-geographische Untersuchung in der Afar Region Ethiopien. PhD Thesis. Bayreuth University, Germany.
Reynolds, J.F. and Stafford Smith, D.M. (2002). Global Desertification: Do Humans Cause Deserts? Volume 88. Dahlem University Press, Berlin.
Sandford, S. (1983). Management of Pastoral Development in the Third World. John Wiley and Sons, New York, 316pp.
Sinclair, A.R.E. and Fryxell, J.M. (1985). The Sahel of Africa: Ecology of a disaster. Canadian Journal of Zoology 63:987–994.
Sonneveld, B.G.J.S., Keyzer, M.A., Georgis, K., Pande, S., Seid Ali, A. and Takele, A. (2009). Following the Afar: Using remote tracking systems to analyze pastoralists trekking routes. Journal of Arid Environments 73(11):1046–1050.
Stuth, J., Schmitt, D., Rowan, R.C., Angerer, J. and Zander, K. (2003). PHYGROW (Phytomass Growth Simulator) User’s Guide. Technical Documentation. Ranching Systems Group Department of Rangeland Ecology and Management. Texas A&M University.
Sullivan, S. (1996). Towards a non-equilibrium ecology: Perspectives from an arid land. Journal of Biogeography 23:1–5.
Sullivan, S. and Rohde, R. (2002). On non-equilibrium in arid and semi-arid grazing systems. Journal of Biogeography 29:1595–1618.
Tesfay, Y. (2004). Pastoral natural resources management in Northern Afar. In: Y. Tesfay and K. Tafere (eds.), Indigenous Rangeland Resources and Conflict Management by the North Afar Pastoral Groups in Ethiopia. A Pastoral Forum Organized by the Drylands Coordination Group (DCG) in Ethiopia, June 27–28, 2003, DCG Report No. 31. Mekelle, Ethiopia.
Tucker, C.J., Pinzón, J.E., Brown, M.E., Slayback, D., Pak, E.W., Mahoney, R., Vermote, E. and El Saleous, N. (2005). An extended AVHRR 8-km NDVI data set compatible with MODIS and SPOT vegetation NDVI data. International Journal of Remote Sensing 26(20):4485–4498.
UN. (1994). UN Earth Summit. Convention on Desertification. UN Conference in Environment and Development, Rio de Janeiro, Brazil, June 3–14, 1992. DPI/SD/1576. United Nations, New York.
Verón, S.R., Paruelo, J.M. and Oesterheld, M. (2006). Assessing desertification. Journal of Arid Environments 66:751–763.
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Sonneveld, B.G.J.S., Pande, S., Georgis, K., Keyzer, M., Seid Ali, A., Takele, A. (2010). Land Degradation and Overgrazing in the Afar Region, Ethiopia: A Spatial Analysis. In: Zdruli, P., Pagliai, M., Kapur, S., Faz Cano, A. (eds) Land Degradation and Desertification: Assessment, Mitigation and Remediation. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-8657-0_8
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