Determinants and rates of land degradation: Application of stationary time-series model to data from a semi-arid environment in Kenya
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Adams W M, Watson E E. 2003. Soil erosion, indigenous irrigation and environmental sustainability, Marakwet, Kenya. Land Degradation & Development, 14(1): 109–122.
Angassa A. 2005. The ecological impact of bush encroachment on the yield of grasses in Borana rangeland ecosystem. African Journal of Ecology, 43(1): 14–20.
Angassa A. 2014. Effects of grazing intensity and bush encroachment on herbaceous species and rangeland condition in Southern Ethiopia. Land Degradation & Development, 25(5): 438–451.
Asner G P, Borghi C E, Ojeda R A. 2003. Desertification in central Argentina: Changes in ecosystem carbon and nitrogen from imaging spectroscopy. Ecological Applications, 13(3): 629–648.
Becerra J X. 2007. The impact of herbivore-plant coevolution on plant community structure. Proceedings of the National Academy of Sciences of the United States of America, 104(18): 7483–7488.
Bennett J E, Palmer A R, Blackett M A. 2012. Range degradation and land tenure change: insights from a ‘released’ communal area of eastern Cape Province, South Africa. Land Degradation & Development, 23(6): 557–568.
Breshears D D, Cobb N S, Rich P M, et al. 2005. Regional vegetation die-off in response to global-change-type drought. Proceedings of the National Academy of Sciences of the United States of America, 102(42): 15144–15148.
Central Bureau of Statistics (CBS). 2000. Republic of Kenya, Ministry of Economic Planning and Development report, Nairobi, Kenya.
Cerdà A. 1998. Effect of climate on surface flow along a climatological gradient in Israel. A field rainfall simulation approach. Journal of Arid Environments, 38(2): 145–159.
Cerdà A, Lavee H. 1999. The effect of grazing on soil and water losses under arid and Mediterranean climates. Implications for desertification. Pirineos, 153–154: 159–174.
Cerdà A. 2000. Aggregate stability against water forces under different climates on agriculture land and scrubland in southern Bolivia. Soil and Tillage Research, 57(3): 159–166.
Cerdà A, Flanagan D C, Le Bissonnais Y, et al. 2009. Soil erosion and agriculture. Soil and Tillage Research, 106(1): 107–108.
Coetzee B W T, Tincani L, Wodu Z, et al. 2008. Overgrazing and bush encroachment by Tarchonanthus camphoratus in a semi-arid savanna. African Journal of Ecology, 46(3): 449–451.
Conant R T, Paustian K. 2002. Potential soil carbon sequestration in overgrazed grassland ecosystems. Global Biogeochemical Cycles, 16(4): 90–1–90-9.
Darkoh M B K. 2003. Regional perspectives on agriculture and biodiversity in the drylands of Africa. Journal of Arid Environments, 54(2): 261–279.
de Souza R G, da Silva D K A, de Mello C M A, et al. 2013. Arbuscular mycorrhizal fungi in revegetated mined dunes. Land Degradation & Development, 24(2): 147–155.
Geist H J, Lambin E F. 2004. Dynamic causal patterns of desertification. Bioscience, 54(9): 817–829.
Gisladottir G, Stocking M. 2005. Land degradation control and its global environmental benefits. Land Degradation & Development, 16(2): 99–112.
GoK (Government of Kenya). 2002. Makueni District Development Plan for the period 2002–2008.
Nairobi: Kenya Government Printers. GoK (Government of Kenya). 2009. Ministry of Planning and Development. Nairobi: National population census.
GoK/NAP. 2002. National Action Programme: Framework for combating desertification in Kenya, in the context of the United Nations Convention to Combat Desertification (UNCCD). Nairobi: National Environment Secretariat.
Haddad N M, Tilman D, Knops J M H. 2002. Long-term oscillations in grassland productivity induced by drought. Ecology Letters, 5(1): 110–120.
Hall D O, Scurlock J M O. 1991. Climate change and productivity of natural grasslands. Annals of Botany, 67(Suppl.): 49–55.
Hibbard K A, Archer S, Schimel D S, et al. 2001. Biogeochemical changes accompanying woody plant encroachment in a subtropical savanna. Ecology, 82(7): 1999–2011.
Holdo R M. 2013. Revisiting the two-layer hypothesis: coexistence of alternative functional rooting strategies in savannas. PLoS ONE, 8(8): e69625.
Izzo M, Araujo N, Aucelli P P C, et al. 2013. Land sensitivity to desertification in the Dominican Republic: an adaptation of the ESA methodology. Land Degradation & Development, 24(5): 486–498.
Kassahun A, Snyman HA, Smit GN. 2008. Livestock grazing behaviour along a degradation gradient in the Somali region of eastern Ethiopia. African Journal of Range & Forage Science, 25(1): 1–9.
Lal R. 2004. Carbon sequestration in dryland ecosystems. Environmental Management, 33(4): 528–544.
Lal R. 2009. Sequestering carbon in soils of arid ecosystems. Land Degradation & Development, 20(4): 441–454.
Lázaro R, Rodrigo F S, Gutiérrez L, et al. 2001. Analysis of a 30-year rainfall record (1967–1997) in semi-arid SE Spain for implications on vegetation. Journal of Arid Environments, 48(3): 373–395.
Li X L, Gao J, Brierley G, et al. 2013. Rangeland degradation on the Qinghai-Tibet Plateau: Implications for rehabilitation. Land Degradation & Development, 24(1): 72–80.
Mataix-Solera J, Cerdà A, Arcenegui V, et al. 2011. Fire effects on soil aggregation: a review. Earth-Science Reviews, 109(1–2): 44–60.
Mganga K Z, Musimba N K R, Nyangito M M, et al. 2010. Improving hydrological responses of degraded soils in semi arid Kenya. Journal of Environmental Science and Technology, 3(4): 217–225.
Mganga K Z, Musimba N K R, Nyariki D M, et al. 2011. Different land use types in the semi-arid rangelands of Kenya influence soil properties. Journal of Soil Science and Environmental Management, 2(11): 370–374.
Mganga K Z, Kuzyakov Y. 2014. Glucose decomposition and its incorporation into soil microbial biomass depending on land use in Mt. Kilimanjaro ecosystems. European Journal of Soil Biology, 62: 74–82.
Mureithi S M, Verdoodt A, Njoka J T, et al. 2016. Impact of community conservation management on herbaceous layer and soil nutrients in a Kenyan semi-arid savannah. Land Degradation & Development, 27(8): 1820–1830.
Mwang’ombe A W, Ekaya W N, Muiru W M, et al. 2011. Livelihoods under climate variability and change: an analysis of the adaptive capacity of rural poor to water scarcity in Kenya’s drylands. Journal of Environmental Science and Technology, 4(4): 403–410.
Ngugi R K, Nyariki D M. 2005. Rural livelihoods in the arid and semi-arid environments of Kenya: sustainable alternatives and challenges. Agriculture and Human Values, 22(1): 65–71.
Nyangito M M, Musimba N K R, Nyariki D M. 2008. Range use and dynamics in the agropastoral system of southeastern Kenya. African Journal of Environmental Science and Technology, 2(8): 222–230.
Nyangito M M, Musimba N K R, Nyariki D M. 2009. Hydrologic properties of grazed perennial swards in semiarid southeastern Kenya. African Journal of Environmental Science and Technology, 3(2): 26–33.
Nyariki D M. 2009. Price response of herd off-take under market liberalization in a developing cattle sector: panel analysis applied to Kenya’s ranching. Environment and Development Economics, 14(2): 263–280.
Oba G, Post E, Syvertsen P O, et al. 2000. Bush cover and range condition assessments in relation to landscape and grazing in Southern Ethiopia. Landscape Ecology, 15(6): 535–546.
Olukoye G A, Kinyamario J I. 2009. Community participation in the rehabilitation of a sand dune environment in Kenya. Land Degradation & Development, 20(4): 397–409.
Omuto C T, Vargas R R, Alim M S, et al. 2010. Mixed-effects modelling of time series NDVI-rainfall relationship for detecting human-induced loss of vegetation cover in drylands. Journal of Arid Environments, 74(11): 1552–1563.
Opiyo FEO, Ekaya W N, Nyariki D M, et al. 2011. Seedbed preparation influence on morphometric characteristics of perennial grasses of a semi-arid rangeland in Kenya. African Journal of Plant Science, 5(8): 460–468.
Pei S F, Fu H, Wan C G. 2008. Changes in soil properties and vegetation following exclosure and grazing in degraded Alxa desert steppe of Inner Mongolia, China. Agriculture, Ecosystems & Environment, 124(1–2): 33–39.
Qadir M, Noble A D, Chartres C. 2013. Adapting to climate change by improving water productivity of soils in dry areas. Land Degradation & Development, 24(1): 12–21.
Roques K G, O’Conner T G, Watkinson A R. 2001. Dynamics of shrub encroachment in an African savanna: relative influences of fire, herbivory, rainfall and density dependence. Journal of Applied Ecology, 38(2): 268–280.
Serneels S, Lambin E F. 2001. Proximate causes of land-use change in Narok District, Kenya: a spatial statistical model. Agriculture, Ecosystems & Environment, 85(1–3): 65–81.
Speranza C I, Kiteme B, Ambenje P, et al. 2010. Indigenous knowledge related to climate variability and change: insights from droughts in semi-arid areas of former Makueni District, Kenya. Climate Change, 100(2): 295–315.
Van der Wal R. 2006. Do herbivores cause habitat degradation or vegetation state transition? Evidence from the tundra. Oikos, 114(1): 177–186.
Visser N, Morris C, Hardy M B, et al. 2007. Restoring bare patches in the Nama-Karoo of South Africa. African Journal of Range & Forage Science, 24(2): 87–96.
Vohland K, Barry B. 2009. A review of in situ rainwater harvesting (RWH) practices modifying landscape functions in African drylands. Agriculture, Ecosystems & Environment, 131(3–4): 119–127.
Wang Q X, Batkhishig O. 2014. Impact of overgrazing on semiarid ecosystem soil properties: a case study of the eastern Hovsgol Lake Area, Mongolia. Journal of Ecosystem & Ecography, 4(1): 140, doi: 10.4172/2157-7625.1000140.
Wang T, Yan C Z, Song X, et al. 2013. Landsat images reveal trends in the Aeolian desertification in a source area for sand and dust storms in China’s Alashan Plateau (1975–2007). Land Degradation & Development, 24(5): 422–429.
Wessels K J, Prince S D, Frost P E, et al. 2004. Assessing the effects of human-induced land degradation in the former homelands of northern South Africa with a 1 km AVHRR NDVI time-series. Remote Sensing of Environment, 91(1): 47–67.