Appelhans T, Mwangomo E, Otte I, Detsch F, Nauss T, Hemp A. 2014. Monthly and annual climate data averaged from 2011 to 2013 for 79 research plots on the southern slopes of Mt. Kilimanjaro - V 1.0: ZENODO.
Beck T, Joergensen RG, Kandeler E, Makeschin F, Nuss E, Oberholzer HR, Scheu S. 1997. An inter-laboratory comparison of ten different ways of measuring soil microbial biomass C. Soil Biol Biochem 29:1023–32.
Belsky AJ. 1994. Influences of trees on savanna productivity: tests of shade, nutrients, and tree-grass competition. Ecology 75:922.
Belsky AJ, Mwonga SM, Amundson RG, Duxbury JM, Ali AR. 1993. Comparative effects of isolated trees on their undercanopy environments in high-and low-rainfall savannas. J Appl Ecol 30:143.
Belsky AJ, Amundson RG, Duxbury JM, Riha SJ, Ali AR, Mwonga SM. 1989. The effects of trees on their physical, chemical and biological environments in a semi-arid savanna in Kenya. J Appl Ecol 26:1005.
Bernhard-Reversat F. 1982. Biogeochemical cycle of nitrogen in a semi-arid savanna. Oikos 38:321.
Blagodatskaya E, Blagodatsky S, Anderson T-H, Kuzyakov Y. 2014. Microbial growth and carbon use efficiency in the rhizosphere and root-free soil. PLOS ONE 9:e93282.
Bradford MA, Crowther TW. 2013. Carbon use efficiency and storage in terrestrial ecosystems. New Phytol 199:7–9.
Burton AJ, Pregitzer KS, Crawford JN, Zogg GP, Zak DR. 2004. Simulated chronic NO3− deposition reduces soil respiration in northern hardwood forests. Glob Chang Biol 10:1080–91.
Ceccon C, Panzacchi P, Scandellari F, Prandi L, Ventura M, Russo B, Millard P, Tagliavini M. 2011. Spatial and temporal effects of soil temperature and moisture and the relation to fine root density on root and soil respiration in a mature apple orchard. Plant Soil 342:195–206.
Cerling TE, Harris JM, MacFadden BJ, Leakey MG, Quade J, Eisenmann V, Ehleringer JR. 1997. Global vegetation change through the Miocene/Pliocene boundary. Nature 389:153–8.
Chen C, Cleverly J, Zhang L, Yu Q, Eamus D. 2016. Modelling seasonal and inter-annual variations in carbon and water fluxes in an arid-zone acacia savanna woodland, 1981–2012. Ecosystems 19(4):625–44.
Chen H, Billen N, Stahr K, Kuzyakov Y. 2007. Effects of nitrogen and intensive mixing on decomposition of 14C-labelled maize (Zea mays L.) residue in soils of different land use types. Soil Tillage Res 96:114–23.
Chesworth W. 2008. Encyclopedia of soil science. Dordrecht: Springer.
Diallo A, Agbangba EC, Ndiaye O, Guisse A. 2013. Ecological structure and prediction equations for estimating tree age, and dendometric parameters of acacia senegal in the senegalese semi-arid zone—ferlo. AJPS 04:1046–53.
Garcia-Moya E, McKell CM. 1970. Contribution of shrubs to the nitrogen economy of a desert-wash plant community. Ecology 51:81–8.
Goldewijk KK. 2001. Estimating global land use change over the past 300 years: The HYDE Database. Global Biogeochem Cycles 15:417–33.
Grace J, Jose JS, Meir P, Miranda HS, Montes RA. 2006. Productivity and carbon fluxes of tropical savannas. J Biogeogr 33:387–400.
Hertel D, Leuschner C. 2002. A comparison of four different fine root production estimates with ecosystem carbon balance data in a Fagus-Quercus mixed forest. Plant Soil 239:237–51.
Hibbard KA, Archer S, Schimel DS, Valentine DW. 2001. Biogeochemical changes accompanying woody plant enchroachment in a subtropical savanna. Ecology 82:1999–2011.
Horton JL, Hart SC. 1998. Hydraulic lift. A potentially important ecosystem process. Trends Ecol Evol 13:232–5.
Huntley BJ, Walker BH. 1982. Ecology of tropical savannas. Berlin: Springer.
IPCC. 2013. Climate change 2013: the physical science basis. contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. Cambridge: Cambridge University Press
Joergensen RG. 1996. The fumigation-extraction method to estimate soil microbial biomass. Calibration of the kEC value. Soil Biol Biochem 28:25–31.
Joergensen RG, Mueller T. 1996. The fumigation-extraction method to estimate soil microbial biomass. Calibration of the kEN value. Soil Biol Biochem 28:33–7.
Kühnel A. 2015. Variability of physical, chemical and hydraulic parameters in soils of Mt. Kilimanjaro across different land uses. Dissertation. Bayreuth, Germany.
Lambin EF, Geist HJ, Lepers E. 2003. Dynamics of land-use and land-cover change in tropcial regions. Annu Rev Environ Resourc 28:205–41.
Ludwig F, de Kroon H, Berendse F, Prins HH. 2004. The influence of savanna trees on nutrient, water and light availability and the understorey vegetation. Plant Ecol 170:93–105.
Ludwig F, Kroon H, Prins HH, Berendse F. 2001. Effects of nutrients and shade on tree-grass interactions in an East African savanna. J Veg Sci 12:579–88.
Meyer KM, Wiegand K, Ward D. 2009. Patch dynamics integrate mechanisms for savanna tree–grass coexistence. Basic Appl Ecol 10:491–9.
Meyer KM, Wiegand K, Ward D, Moustakas A. 2007. The rhythm of savanna patch dynamics. J Ecol 95:1306–15.
Miranda AC, Miranda HS, Lloyd J, Grace J, Francey RJ, McIntyre JA, Meir P, Riggan P, Lockwood R, Brass J. 1997. Fluxes of carbon, water and energy over Brazilian cerrado. An analysis using eddy covariance and stable isotopes. Plant Cell Environ 20:315–28.
Nicolardot B, Recous S, Mary B. 2001. Simulation of C and N mineralisation during crop residue decomposition: A simple dynamic model based on the C: N ratio of the residues. Plant Soil 228:83–103.
Otieno D, Ondier J, Arnhold S, Okach D, Ruidisch M, Lee B, Kolb A, Onyango J, Huwe B. 2015. Patterns of CO2 exchange and productivity of the herbaceous vegetation and trees in a humid savanna in western Kenya. Plant Ecol 216:1441–56.
Otieno DO, Schmidt M, Kinyamario JI, Tenhunen J. 2005. Responses of Acacia tortilis and Acacia xanthophloea to seasonal changes in soil water availability in the savanna region of Kenya. J Arid Environ 62:377–400.
Perakis SS, Kellogg CH. 2007. Imprint of oaks on nitrogen availability and δ15N in California grassland-savanna. A case of enhanced N inputs? Plant Ecol 191:209–20.
R Core Team. 2013. R. A language and environment for statistical computing. Vienna, Austria: R Foundation for Statistical Computing.
Rascher KG, Hellmann C, Máguas C, Werner C. 2012. Community scale 15 N isoscapes: tracing the spatial impact of an exotic N2 -fixing invader. Ecol Lett 15:484–91.
Raz-Yaseef N, Rotenberg E, Yakir D. 2010. Effects of spatial variations in soil evaporation caused by tree shading on water flux partitioning in a semi-arid pine forest. Agric For Meteorol 150:454–62.
Schleicher J, Wiegand K, Ward D. 2011. Changes of woody plant interaction and spatial distribution between rocky and sandy soil areas in a semi-arid savanna, South Africa. J Arid Environ 75:270–8.
Scholes RJ, Archer SR. 1997. Tree-grass interactions in savannas. Annu Rev Ecol Syst 28:517–44.
Scholes RJ, Walker BH. 1993. An African savanna. Cambridge: Cambridge University Press.
Scholes RJ. 1990. The influence of soil fertility on the ecology of southern African dry savannas. J Biogeogr 17:415.
Sinsabaugh RL, Manzoni S, Moorhead DL, Richter A. 2013. Carbon use efficiency of microbial communities: stoichiometry, methodology and modelling. Ecology letters 16:930–9.
Sitters J, Edwards PJ, Suter W, Olde Venterink H. 2015. Acacia tree density strongly affects N and P fluxes in savanna. Biogeochemistry 123:285–97.
Spohn M. 2015. Microbial respiration per unit microbial biomass depends on litter layer carbon-to-nitrogen ratio. Biogeosciences 12:817–23.
Staver AC, Archibald S, Levin S. 2011. Tree cover in sub-Saharan Africa. Rainfall and fire constrain forest and savanna as alternative stable states. Ecology 92:1063–72.
Vance ED, Brookes PC, Jenkinson DS. 1987. An extraction method for measuring soil microbial biomass C. Soil Biol Biochem 19:703–7.
Varella RF, Bustamante MMC, Pinto AS, Kisselle KW, Santos RV, Burke RA, Zepp RG, Viana LT. 2004. Soil Fluxes of CO2, CO, NO, and N2O from an Old Pasture and from Native Savanna in Brazil. Ecol Appl 14:221–31.
Veenendaal EM, Kolle O, Lloyd J. 2004. Seasonal variation in energy fluxes and carbon dioxide exchange for a broad-leaved semi-arid savanna (Mopane woodland) in Southern Africa. Global Chang Biol 10:318–28.
Vetaas OR. 1992. Micro-site effects of trees and shrubs in dry savannas. J Veg Sci 3:337–44.
Virginia RA, Jenkins MB, Jarrell WM. 1986. Depth of root symbiont occurrence in soil. Biol Fertil Soils 2(3):127–30.
Vitousek PM, Walker LR. 1989. Biological invasion by Myrica faya in Hawai’i: plant demography, nitrogen fixation, ecosystem effects. Ecol Monogr 59:247–65.
Werner C, Reiser K, Dannenmann M, Hutley LB, Jacobeit J, Butterbach-Bahl K. 2014. N2O, NO, N2 and CO2 emissions from tropical savanna and grassland of northern Australia. An incubation experiment with intact soil cores. Biogeosciences 11:6047–65.
Yelenik SG, Stock WD, Richardson DM. 2004. Ecosystem level impacts of invasive Acacia saligna in the South African fynbos. Restor Ecology 12:44–51.