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  • Andersen, A.N., Braithwate, R.W., Cook, G.D., Corbett, L.K., Williams, R.J., Douglas, M.M., Gill, A.M., Setterfield, S.A. & Muller, W.J. (1998) Fire research for conservation management in tropical savannas: introducing the Kapalga fire experiment. Australian Journal of Ecology, 23, 95110.
  • Archer, S. (1995) Tree–grass dynamics in a Prosopis–thornscrub savanna parkland: reconstructing the past and predicting the future. Ecoscience, 2, 8399.
  • Archer, S., Scifres, C. & Bassham, C.R. (1988) Autogenic succession in a subtropical savanna: conversion of grassland to thorn woodland. Ecological Monographs, 58, 111127.
  • Belsky, A.J. (1990) Tree/grass relations in East African savannas: a comparison of existing models. Journal of Biogeography, 17, 483489.
  • Belsky, A.J. (1994) Influences of trees on savanna productivity: tests of shade, nutrients, and tree–grass competition. Ecology, 75, 922932.
  • Belsky, A.J., Amundson, R.G., Duxbury, J.M., Ritia, S.J., Ali, A.R. & Mwonga, S.M. (1989) The effects of trees on their physical, chemical and biological environments in a semi-arid savanna in Kenya. Journal of Applied Ecology, 26, 10051024.
  • Bond, W.J. & Van Wilgen, B.W. (1996) Fire and Plants. Chapman & Hall, London, UK.
  • Boo, R.M., Pelaez, D.V., Bunting, S.C., Mayor, M.D. & Elia, O.R. (1997) Effect of fire on woody species in central semi-arid Argentina. Journal of Arid Environments, 35, 8794.DOI: 10.1006/jare.1995.0135
  • Brown, J.R. & Archer, S. (1989) Woody plant invasion of grasslands: establishment of honey mesquite (Prosopis glandulosa var. glandulosa) on sites differing in herbaceous biomass and grazing history. Oecologia, 80, 1926.
  • Brown, N.A.C. & Booysen, P.D.E.V. (1967) Seed germination and seedling growth for two Acacia species under field conditions in grassveld. South African Journal of Science, 10, 659666.
  • Cheney, P. & Sullivan, A. (1997) Grassfires: Fuel, Weather and Fire Behaviour. CSIRO Publishing, Collingwood, Australia.
  • Cheney, N.P., Gould, J.S. & Catchpole, W.R. (1993) The influence of fuel, weather and fire shape variables on fire-spread in grasslands. International Journal of Wildland Fire, 3, 312.
  • Chesson, P.L. & Huntly, N. (1989) Short term instabilities and long-term community dynamics. Trends in Ecology and Evolution, 4, 293298.
  • Chesson, P.L. & Warner, R.R. (1981) Environmental variability promotes coexistence in lottery competitive systems. American Naturalist, 117, 923943.
  • Chidumayo, E.N. (1997) Annual and spatial variation in herbaceous biomass production in a Zambian dry miombo woodland. South African Journal of Botany, 63, 7481.
  • Chidumayo, E. & Frost, P. (1996) Population biology of miombo trees. The Miombo in Transition: Woodlands and Welfare in Africa (ed. B.Campbell), pp. 5972. CIFOR, Bogor, Indonesia.
  • Cole, M.M. (1986) The Savannas: Biogeography and Geobotany. Academic Press, London, UK.
  • Coughenour, M.B. (1991) Spatial components of plant–herbivore interactions in pastoral, ranching and native ungulate ecosystems. Journal of Range Management, 44, 530542.
  • Cumming, D.H. (1982) The influence of large herbivores on savanna structure in Africa. Ecology of Tropical Savannas (eds B.J.Huntly & B.H.Walker), pp. 217245. Springer-Verlag, Berlin, Germany.
  • Danckwerts, J.E. (1982) The grazing capacity of sweetveld. I A technique to record grazing capacity in sweetveld. Proceedings of the Grassland Society of South Africa, 17, 9093.
  • Davis, M.A., Wrange, K.J. & Reich, P.B. (1998) Competition between tree seedlings and herbaceous vegetation: support for a theory of resource supply and demand. Journal of Ecology, 86, 652661.
  • Du Toit, P.F. (1967) Bush encroachment with specific reference to Acacia karoo encroachment. Proceedings of the Grassland Society of South Africa, 2, 119126.
  • Dublin, H.T., Sinclair, A.R.E. & McGlade, J. (1990) Elephants and fire as causes of multiple stable states in the Serengeti–Mara woodlands. Journal of Animal Ecology, 59, 11471164.
  • Eagleson, P.S. (1989) Stability of tree/grass vegetation systems. Understanding Climate Change. Geophysical Monographs 52 (eds A.Berger, R.E.Dickinson & J.W.Kidson), pp. 109113. Geophysical Union, Washington, DC.
  • Frost, P. (1996) The ecology of miombo trees. The Miombo in Transition: Woodlands and Welfare in Africa(ed. B.Campbell), pp. 1158. CIFOR, Bogor, Indonesia.
  • Gignoux, J., Clobert, J. & Menaut, J.C. (1997) Alternative fire resistance strategies in savanna trees. Oecologia, 110, 576583.DOI: 10.1007/s004420050198
  • Grubb, P.J. (1977) The maintenance of species richness in plant communities. The importance of the regeneration niche. Biological Reviews of the Cambridge Philosophical Society, 52, 107145.
  • Grunow, J.O., Groeneveld, H.T. & Du Toit, S.H.C. (1980) Above-ground dry matter dynamics of the grass layer of a South African tree savanna. Journal of Ecology, 68, 877889.
  • Harrington, G.N. (1991) Effects of soil moisture on shrub seedling survival in a semi-arid grassland. Ecology, 72, 11381149.
  • Helsa, B.I., Tieszen, L.L. & Boutton, T.W. (1985) Seasonal water relations of savanna shrubs and grasses in Kenya, East Africa. Journal of Arid Environment, 8, 1531.
  • Higgins, S.I. & Richardson, D.M. (1999) Predicting plant migration rates in a changing world: the role of long-distance dispersal. American Naturalist, 153, 464475.
  • Hochberg, M.E., Menaut, J.C. & Gignoux, J. (1994) The influence of tree biology and fire in the spatial structure of the West African savannah. Journal of Ecology, 82, 217226.
  • Hodgkinson, K.C. (1991) Shrub recruitment response to intensity and season of fire in a semi-arid woodland. Journal of Applied Ecology, 28, 6070.
  • Hodgkinson, K.C. (1998) Sprouting success of shrubs after fire: height dependent relationships for different strategies. Oecologia, 115, 6462.DOI: 10.1007/s004420050492
  • Hoffmann, W.A. (1996) The effects of fire and cover on seedling establishment in a neotropical savanna. Journal of Ecology, 84, 383393.
  • Holmgren, M., Scheffer, M. & Huston, M.A. (1997) The interplay of facilitation and competition in plant communities. Ecology, 78, 19661975.
  • Jeltsch, F., Milton, S.J., Dean, W.R.J. & Van Royen, N. (1996) Tree spacing and co-existence in semi-arid savannas. Journal of Ecology, 84, 583595.
  • Jeltsch, F., Milton, S.J., Dean, W.R.J. & Van Royen, N. (1997) Analysing shrub encroachment in the southern Kalahari: a grid-based modelling approach. Journal of Applied Ecology, 34, 14971508.
  • Jeltsch, F., Milton, S.J., Dean, W.R.J., Van Royen, N. & Moloney, K.A. (1998) Modelling the impact of small-scale heterogeneities on tree–grass co-existence in semi-arid savannas. Journal of Ecology, 86, 780793.
  • Johns, G.G. (1984) Soil water storage in a semi-arid Eucalyptus populnea woodland invaded by woody shrubs, and the effects of shrub clearing and tree ringbarking. Australian Rangeland Journal, 6, 7585.
  • Knoop, W.T. & Walker, B.H. (1985) Interactions of woody and herbaceous vegetation in a Southern African savanna. Journal of Ecology, 73, 235253.
  • Lacey, C.J., Walker, J. & Noble, I.R. (1982) Fire in Australian tropical savannas. Ecology of Tropical Savannas (eds B.J.Huntly & B.H.Walker), pp. 246272. Springer-Verlag, Berlin, Germany.
  • Le Roux, X., Bariac, T. & Mariotti, A. (1995) Spatial partitioning of the soil water resource between grass and shrub components in a West African humid savanna. Oecologia, 104, 147155.
  • Medina, E. & Silva, J.F. (1990) Savannas of northern South America: a steady state regulated by water–fire interactions on a background of low nutrient availability. Journal of Biogeography, 17, 403413.
  • Menaut, J., Gignoux, J., Prado, C. & Clobert, J. (1990) Tree community dynamics in a humid savanna of the Cote-d’Ivoire: modelling the effects of fire and competition with grass and neighbours. Journal of Biogeography, 17, 471481.
  • Miller, M.F. (1994) The costs and benefits of Acacia seed consumption by ungulates. Oikos, 71, 181187.
  • Mordelet, P. & Menaut, J.C. (1995) Influence of trees on above-ground production dynamics of grasses in a humid savanna. Journal of Vegetation Science, 6, 223228.
  • Mordelet, P., Menaut, J.C. & Mariotti, A. (1997) Tree and grass rooting patterns in an African humid savanna. Journal of Vegetation Science, 8, 6570.
  • Moreno, J.M. & Oechel, W.C. (1993) Demography of Adenostoma fasciculatum after fires of different intensities in southern California chaparral. Oecologia, 96, 95101.
  • Noble, I.R. & Slatyer, R.O. (1980) The use of vital attributes to predict successional changes in plant communities subject to recurrent disturbances. Vegetatio, 43, 521.
  • O’Connor, T.G. (1985) A Synthesis of Field Experiments Concerning the Grass Layer in the Savanna Regions of Southern Africa. National Scientific Programmes Report 144, Pretoria, South Africa.
  • O’Connor, T.G. (1995) Acacia karoo invasion of grassland: environmental and biotic effects influencing seedling emergence and establishment. Oecologia, 103, 214223.
  • O’Connor, T.G. & Bredenkamp, G.J. (1997) Grassland. Vegetation of Southern Africa (eds R.M.Cowling, D.M.Richardson & S.M.Pierce), pp. 215257. Cambridge University Press, Cambridge, UK.
  • Pellew, R.A.P. (1983) The impacts of elephant, giraffe and fire upon the Acacia tortilis woodlands of the Serengeti. African Journal of Ecology, 21, 4174.
  • Prins, H.H.T. & Van Der Jeugd, H.P. (1993) Herbivore population crashes and woodland structure in East Africa. Journal of Ecology, 81, 305314.
  • Ribbens, E., Silander, J.A. & Pacala, S.W. (1994) Seedling recruitment in forests: calibrating models to predict patterns of tree seedling dispersal. Ecology, 75, 17941806.
  • Richards, J.H. & Caldwell, M.M. (1987) Hydraulic lift: substantial nocturnal transport between soil layers by Artemisia tridentata roots. Oecologia, 73, 486489.
  • Sarmiento, G. (1984) The Ecology of Neotropical Savannas. Harvard University Press, Cambridge, MA.
  • Scholes, R.J. (1997) Savanna. Vegetation of Southern Africa (eds R.M.Cowling, D.M.Richardson & S.M.Pierce), pp. 258277. Cambridge University Press, Cambridge. UK.
  • Scholes, R.J. & Archer, S.R. (1997) Tree–grass interactions in savannas. Annual Review of Ecology and Systematics, 28, 517544.
  • Scholes, R.J. & Walker, B.H. (1993) An African Savanna: Synthesis of the Nylsvley Study. Cambridge University Press, Cambridge, UK.
  • Seghieri, J. (1995) The rooting patterns of woody and herbaceous plants in a savanna; are they complementary or in competition? African Journal of Ecology, 33, 358365.
  • Shackleton, C.M. (1997) The prediction of woody productivity in the savanna biome, South Africa. PhD Thesis. University of the Witwatersrand, Johannesburg, South Africa.
  • Shmida, A. & Ellner, S. (1984) Coexistence of plant species with similar niches. Vegetatio, 58, 2955.
  • Skarpe, C. (1991) Impact of grazing in savanna ecosystems. Ambio, 20, 351356.
  • Skarpe, C. (1992) Dynamics of savanna ecosystems. Journal of Vegetation Science, 3, 293300.
  • Skoglund, J. (1992) The role of seedbanks in vegetation dynamics and restoration of dry tropical ecosystems. Journal of Vegetation Science, 3, 357360.
  • Smith, T.M. & Shackleton, S.E. (1988) The effects of shading on the establishment and growth of Acacia tortilis seedlings. South African Journal of Botany, 54, 375379.
  • Smith, T.M. & Walker, B.H. (1983) The role of competition in the spacing of savanna trees. Proceedings of the Grassland Society of South Africa, 18, 159164.
  • Stuart-Hill, G.C. & Tainton, N.M. (1989) Water utilisation patterns around isolated Acacia karoo trees in the false thornveld of the eastern Cape. Journal of the Grassland Society of South Africa, 6, 195204.
  • Thomson, P.J. (1975) The role of elephants, fire and other agents in the decline of a Brachystegia boehmii woodland. Journal of the Southern African Wildlife Management Association, 5, 1118.
  • Trapnell, C.G. (1959) Ecological results of woodland burning in Northern Rhodesia. Journal of Ecology, 47, 161172.
  • Trollope, W.S.W. (1974) The role of fire in preventing bush encroachment in the Eastern Cape. Proceedings of the Grassland Society of South Africa, 9, 6772.
  • Trollope, W.S.W. (1980) Controlling bush encroachment with fire in the savanna area of South Africa. Proceedings of the Grassland Society of South Africa, 15, 173177.
  • Trollope, W.S.W. (1982) Ecological effects of fire in South African savannas. Ecology of Tropical Savannas (eds B.J.Huntly & B.H.Walker), pp. 292306. Springer-Verlag, Berlin, Germany.
  • Trollope, W.S.W. (1984) Fire in savanna. Ecological Effects of Fire in South African Ecosystems (eds P.D.V.Booysen & N.M.Tainton), pp. 199218. Springer-Verlag, Berlin, Germany.
  • Trollope, W.S.W. (1998) Effect and Use of Fire in the Savanna Areas of Southern Africa. Department of Livestock and Pasture Science, Faculty of Agriculture, University of Fort Hare, Alice, South Africa.
  • Trollope, W.S.W., Potgieter, A.L.F. & Zambatis, N. (1989) Assessing veld condition in the Kruger National Park using key grass species. Koedoe, 32, 6795.
  • Turelli, M. & Gillespie, J.H. (1980) Conditions for the existence of asymptotic densities for some two-dimensional diffusion processes with applications in population biology. Theoretical Population Biology, 17, 167189.
  • Turner, M.G. & Romme, W.H. (1994) Landscape dynamics in crown fire ecosystems. Landscape Ecology, 9, 5977.
  • Tybirk, K., Schmidt, L.H. & Hauser, T. (1993) Notes on soil seed banks of African acacias. African Journal of Ecology, 32, 327330.
  • Vetaas, O.R. (1992) Micro-site effects of trees and shrubs in dry savannas. Journal of Vegetation Science, 3, 337344.
  • Walker, B.H. & Noy-Meir, I. (1982) Aspects of stability and resilience in savanna ecosystems. Ecology of Tropical Savannas (eds B.J.Huntly & B.H.Walker), pp. 556590. Springer-Verlag, Berlin, Germany.
  • Walker, B.H., Ludwig, D., Holling, C.S. & Peterman, R.M. (1981) Stability of semi-arid savannah grazing systems. Journal of Ecology, 69, 473498.
  • Walter, H. (1971) Ecology of Tropical and Subtropical Vegetation. Oliver and Boyd, Edinburgh, UK.
  • Warner, R.R. & Chesson, P.L. (1985) Coexistence mediated by recruitment fluctuations: a field guide to the storage effect. American Naturalist, 125, 769787.
  • Webber, L.N. (1997) The effect of grass flammability on fire intensity and the estimation of fire intensity through the amount of heat required to vaporise different volumes of water in containers placed in veld fire. Honours Dissertation. Department of Livestock and Pasture Science, Faculty of Agriculture, University of Fort Hare, Alice, South Africa.
  • Weltzin, J.F. & Coughenour, M.B. (1990) Savanna tree influence on understorey vegetation and soil nutrients in north-western Kenya. Journal of Vegetation Science, 1, 325334.
  • Weltzin, J.F. & McPherson, G.R. (1997) Spatial and temporal soil moisture resource partitioning by trees and grasses in a temperate savanna, Arizona, USA. Oecologia, 112, 156164.DOI: 10.1007/s004420050295
  • Van Wilgen, B.W. & Scholes, R.J. (1997) The vegetation and fire regimes of southern hemisphere Africa. Fire in Southern African Savannas (eds B.W.Van Wilgen, M.O.Andreae, J.G.Goldammer & J.A.Lindesay), pp. 2746. Witwatersrand University Press, Johannesburg, South Africa.
  • Williams, R.J., Cook, G.D., Gill, A.M. & Moore, P.H.R. (1999) Fire regime, fire intensity and tree survival in a tropical savanna in northern Australia. Australian Journal of Ecology, 24, 5059.
  • Wright, H.A., Bunting, S.C. & Neuenschander, L.F. (1976) Effect of fire on honey mesquite. Journal of Range Management, 29, 467471.