Simplifying the savanna: The trajectory of fire-sensitive vegetation mosaics in northern Australia

Journal of Biogeography

Volumn 39, Issue 7, 2012, Pages 1303-1317

  Russell Smith, Jeremy ^a,b   Edwards, Andrew C ^a   Price, Owen F ^c  

^a Bushfires NT   (Australia)

^b CHARLES DARWIN UNIVERSITY   (Australia)

^c UNIVERSITY OF WOLLONGONG   (Australia)

Author keywords

Arnhem Land; Australia; Fire history; Fire regimes; Kakadu National Park; Landsat imagery; Long term monitoring; Woody thickening

Indexed keywords

CONIFEROUS FOREST; FIRE HISTORY; FLORISTICS; LANDSAT; LONG-TERM CHANGE; SATELLITE IMAGERY; SAVANNA; SMALL MAMMAL;

ARNHEM PLATEAU; AUSTRALIA; KAKADU NATIONAL PARK; NORTHERN TERRITORY;

ALLOSYNCARPIA TERNATA; CALLITRIS INTRATROPICA; MAMMALIA;

EID: 84862694483     PISSN: 03050270     EISSN: 13652699     Source Type: Journal    
DOI: 10.1111/j.1365-2699.2012.02679.x     Document Type: Article

References (91)

1. Aubréville, A. (1966) Les lisières forêt-savane des régions tropicales. Adansonia, 6, 175-187.
2. Australian Bureau of Meteorology (2009) Australian rainfall and temperature data. Available at:
3. Banfai, D.S. & Bowman, D.M.J.S. (2006) Forty years of lowland monsoon rainforest expansion in Kakadu National Park, northern Australia. Biological Conservation, 131, 553-565.
4. Barrett, D. (2011) Time scales and dynamics of carbon in Australia's savannas. Ecosystem function in savannas: measurement and modeling at landscape to global scales (ed. by M.J. Hill and N.P. Hanan ), pp. 347-366. CRC Press, Boca Raton, FL.
5. Beringer, J., Hutley, L.B., Tapper, N.J. & Cernusak, L.A. (2007) Savanna fires and their impact on net ecosystem productivity in North Australia. Global Change Biology, 13, 990-1004.
6. 2 and land use change. Global Change Biology, 10, 1884-1898.
7. 4 grasslands and savannas? Annual Review of Ecology and Systematics, 39, 641-659.
8. Bond, W.J. & van Wilgen, B.W. (1996) Fire and plants. Chapman and Hall, London.
9. Bond, W.J., Woodward, F.I. & Midgley, G.F. (2005) The global distribution of ecosystems in a world without fire. New Phytologist, 165, 341-345.
10. Bowman, D.M.J.S. (1994) Preliminary observations on the mortality of Allosyncarpia ternata stems on the Arnhem Land plateau, northern Australia. Australian Forestry, 57, 62-64.
11. Bowman, D.M.J.S. (1999) Australian rainforests: islands of green in the land of fire. Cambridge University Press, Cambridge.
12. Bowman, D.M.J.S. & Dingle, J.K. (2006) Late 20th century landscape-wide expansion of Allosyncarpia ternata (Myrtaceae) forest in Kakadu National Park, northern Australia. Australian Journal of Botany, 54, 707-715.
13. Bowman, D.M.J.S. & Fensham, R.J. (1991) Response of a monsoon forest-savanna boundary to fire protection, Weipa, northern Australia. Australian Journal of Ecology, 16, 111-118.
14. Bowman, D.M.J.S. & Panton, W.J. (1993) Decline of Callitris intratropica in the Northern Territory: implications for pre- and post-colonization fire regimes. Journal of Biogeography, 20, 373-381.
15. Bowman, D.M.J.S., Walsh, A. & Milne, D.J. (2001a) Forest expansion and grassland contraction within a Eucalyptus savanna matrix between 1941 and 1994 at Litchfield National Park in the Australian monsoon tropics. Global Ecology and Biogeography, 10, 535-548.
16. Bowman, D.M.J.S., Price, O., Whitehead, P.J. & Walsh, A. (2001b) The 'wilderness effect' and the decline of Callitris intratropica on the Arnhem Land Plateau, northern Australia. Australian Journal of Botany, 49, 665-672.
17. Bowman, D.M.J.S., Riley, J.E., Boggs, G.S., Lehmann, C.E.R. & Prior, L.D. (2008) Do feral buffalo (Bubalus bubalis) explain the increase of woody cover in savannas of Kakadu National Park, Australia? Journal of Biogeography, 35, 1976-1988.
18. Burnham, K.P. & Anderson, D.R. (2002) Model selection and multi-model inference: a practical information theoretic approach. Springer-Verlag, New York.
19. Cary, G.J. & Morrison, D.A. (1995) Effects of fire frequency on plant species composition of sandstone communities in the Sydney region: combinations of inter-fire intervals. Australian Journal of Ecology, 20, 418-426.
20. Cook, G.D. & Dias, L. (2006) It was no accident: plant introductions by Australian government agencies during the 20th century. Australian Journal of Botany, 54, 601-625.
21. CSIRO & Bureau of Meteorology (2007) Climate change in Australia: technical report 2007. CSIRO, Australia. Available at:
22. Edwards, A., Kennett, R., Price, O., Russell-Smith, J., Spiers, G. & Woinarski, J. (2003) Monitoring the impacts of fire regimes on vegetation in northern Australia: an example from Kakadu National Park. International Journal of Wildland Fire, 12, 427-440.
23. Edwards, A.C. & Russell-Smith, J. (2009) Ecological thresholds and the status of fire-sensitive vegetation in western Arnhem Land, northern Australia: implications for management. International Journal of Wildland Fire, 18, 127-146.
24. Felderhof, L. & Gillieson, D. (2006) Comparison of fire patterns and fire frequency in two tropical savanna biomes. Austral Ecology, 31, 736-746.
25. Fensham, R.J. & Fairfax, R.J. (2003) Assessing woody cover change in north-west Australian savanna using aerial photography. International Journal of Wildland Fire, 12, 359-367.
26. Fensham, R.J., Low Choy, S.J., Fairfax, R.J. & Cavallaro, P.C. (2003) Modelling trends in woody vegetation structure in semi-arid Australia as determined from aerial photography. Journal of Environmental Management, 68, 421-436.
27. Fensham, R.J., Fairfax, R.J. & Ward, D.P. (2009) Drought-induced tree death in savanna. Global Change Biology, 15, 380-387.
28. Fisher, R., Vigilante, T., Yates, C.P. & Russell-Smith, J. (2003) Patterns of landscape fire and predicted vegetation response in the North Kimberley region of Western Australia. International Journal of Wildland Fire, 12, 369-379.
29. Furley, P.A., Proctor, J. & Ratter, J.A. (eds) (1992) Nature and dynamics of forest-savanna boundaries. Chapman and Hall, London.
30. Grace, J., San José, J., Meir, P., Miranda, H.S. & Montes, R.A. (2006) Productivity and carbon fluxes of tropical savannas. Journal of Biogeography, 33, 387-400.
31. Graham, G. (2002) An assessment of the distribution and status of Arnhem cypress pine Callitris intratropica (R. T. Baker & H. G. Sm.) in the Kimberley Region, Western Australia. Report to the National Reserves System Program, Environment Australia, Canberra. Department of Conservation and Land Management, Western Australia.
32. Higgins, S.I., Bond, W.J. & Trollope, W.S.W. (2000) Fire, resprouting and variability: a recipe for grass-tree coexistence in savanna. Journal of Ecology, 88, 213-229.
33. Higgins, S.I., Bond, W.J., February, E.C., Bronn, A., Euston-Brown, D.I.W., Enslin, B., Govender, N., Rademan, L., O'Regan, S., Potgieter, A.L.F., Scheiter, S., Sowry, R., Trollope, L. & Trollope, W.S.W. (2007) Effects of four decades of fire manipulation on woody vegetation structure in savanna. Ecology, 88, 1119-1125.
34. Hoffmann, W.A. (1998) Post-burn reproduction of woody plants in a Neotropical savanna: the relative importance of sexual and vegetative reproduction. Journal of Applied Ecology, 35, 422-433.
35. Hoffmann, W.A., Haridasan, M., de Carvalho, M.T., Geiger, E.L., Pereira, M.A.B., Gotsch, S.G. & Franco, A.C. (2009) Tree topkill, not mortality, governs the dynamics of savanna-forest boundaries under frequent fire in central Brazil. Ecology, 90, 1326-1337.
36. Ingwersen, F. (1995) Kakadu-Alligator Rivers region, Northern Territory, Australia - CPD site Au4. Centres of plant diversity: a guide and strategy for their conservation. Vol. 2. Asia, Australasia and the Pacific (ed. by S.D. Davis, V.H. Heywood and A.C. Hamilton ), pp. 471-475. WWF and IUCN, Cambridge.
37. Keeley, J.E. & Zedler, P.H. (1998) Evolution of life histories in Pinus. Ecology and biogeography of Pinus (ed. by D.M. Richardson ), pp. 219-249. Cambridge University Press, Cambridge.
38. Lawes, M.J., Adie, H., Russell-Smith, J., Murphy, B.P. & Midgley, J.J. (2011a) How do small savanna trees avoid stem mortality by fire? The roles of stem diameter, height and bark thickness. Ecosphere, 2, 1-13, art42. doi:
39. Lawes, M.J., Murphy, B.P., Midgley, J.J. & Russell-Smith, J. (2011b) Are the eucalypt and non-eucalypt components of Australian tropical savannas independent? Oecologia, 166, 229-239.
40. Lehmann, C.E.R., Prior, L.D. & Bowman, D.M.J.S. (2009a) Multi-decadal dynamics of tree cover in an Australian tropical savanna. Austral Ecology, 34, 601-612.
41. Lehmann, C.E.R., Prior, L.D. & Bowman, D.M.J.S. (2009b) Fire controls population structure in four dominant species in a tropical savanna. Oecologia, 161, 505-515.
42. Liedloff, A.C. & Cook, G.D. (2007) Modelling the effects of rainfall variability and fire on tree populations in an Australian tropical savanna with the FLAMES simulation model. Ecological Modelling, 201, 269-282.
43. Maier, S.W. & Russell-Smith, J. (2012) Measuring and monitoring of contemporary fire regimes in Australia using satellite remote sensing. Flammable Australia: fire regimes, biodiversity and ecosystems in a changing world (ed. by R.A. Bradstock, A.M. Gill and R.W. Williams ), pp. 79-95. CSIRO Publications, Melbourne.
44. Murphy, B.P., Russell-Smith, J. & Prior, L.D. (2010) Frequent fires reduce tree growth rates in northern Australian savannas: implications for tree demography and carbon sequestration. Global Change Biology, 16, 331-343.
45. Myers, R.L. & Rodriguez-Trejo, D.A. (2009) Fire in tropical pine savannas. Tropical fire ecology: climate change, land use and ecosystem dynamics (ed. by M.A. Cochrane ), pp. 557-605. Springer Praxis, New York.
46. Petty, A.M., Werner, P.A., Lehmann, C.E.R., Riley, J.E., Banfai, D.S. & Elliott, L.P. (2007) Savanna responses to feral buffalo in Kakadu National Park, Australia. Ecological Monographs, 77, 441-463.
47. Price, O. & Bowman, D.M.J.S. (1994) Fire-stick forestry: a matrix model in support of skilful fire management of Callitris intratropica R.T. Baker by north Australian Aborigines. Journal of Biogeography, 21, 573-580.
48. Price, O.F. (2006) Movements of frugivorous birds among fragmented rainforests in the Northern Territory, Australia. Wildlife Research, 33, 521-528.
49. Prior, L.D., Brook, B.W., Williams, R.J., Werner, P.A., Bradshaw, C.J.A. & Bowman, D.M.J.S. (2006) Environmental and allometric drivers of tree growth rates in a north Australian savanna. Forest Ecology and Management, 234, 164-180.
50. Prior, L.D., Bowman, D.M.J.S. & Brooke, B.W. (2007) Growth and survival of two north Australian relictual tree species, Allosyncarpia ternata (Myrtaceae) and Callitris intratropica (Cupressaceae). Ecological Research, 22, 228-236.
51. Prior, L.D., Murphy, B.P. & Russell-Smith, J. (2009) Environmental and demographic correlates of tree recruitment and mortality in north Australian savannas. Forest Ecology and Management, 257, 66-74.
52. Prior, L.D., Williams, R.J. & Bowman, D.M.J.S. (2010) Experimental evidence that fire causes a tree recruitment bottleneck in an Australian tropical savanna. Journal of Tropical Ecology, 26, 595-603.
53. R Core Development Team (2007) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna.
54. Roques, K.G., O'Connor, 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, 268-280.
55. Rose Innes, R. (1972) Fire in West African vegetation. Proceedings of Tall Timbers Fire Ecology Conference, 11, 175-199.
56. Rossiter, N.A., Setterfield, S.A., Douglas, M.M. & Hutley, L.B. (2003) Testing the grass-fire cycle: alien grass invasion in the tropical savannas of northern Australia. Diversity and Distributions, 9, 169-176.
57. Russell-Smith, J. (2006) Recruitment dynamics of the long-lived obligate seeders Callitris intratropica (Cupressaceae) and Petraeomyrtus punicea (Myrtaceae). Australian Journal of Botany, 54, 479-485.
58. Russell-Smith, J. & Bowman, D.M.J.S. (1992) Conservation of monsoon rainforest isolates in the Northern Territory, Australia. Biological Conservation, 59, 51-63.
59. Russell-Smith, J. & Edwards, A.C. (2006) Seasonality and fire severity in savanna landscapes of monsoonal northern Australia. International Journal of Wildland Fire, 15, 541-550.
60. Russell-Smith, J., Lucas, D.E., Brock, J. & Bowman, D.M.J.S. (1993) Allosyncarpia-dominated rain forest in monsoonal northern Australia. Journal of Vegetation Science, 4, 67-82.
61. Russell-Smith, J., Ryan, P.G., Klessa, D., Waight, G. & Harwood, R. (1998) Fire regimes, fire-sensitive vegetation, and fire management of the sandstone Arnhem Plateau, monsoonal northern Australia. Journal of Applied Ecology, 35, 829-846.
62. Russell-Smith, J., Ryan, P.G. & Cheal, D. (2002) Fire regimes and the conservation of sandstone heath in monsoonal northern Australia: frequency, interval, patchiness. Biological Conservation, 104, 91-106.
63. Russell-Smith, J., Stanton, J.P., Edwards, A.J. & Whitehead, P.J. (2004) Rainforest invasion of eucalypt-dominated woodland savanna, Iron Range, north-eastern Australia: II. Rates of landscape change. Journal of Biogeography, 31, 1305-1316.
64. Russell-Smith, J., Yates, C.P., Whitehead, P.J., Smith, R., Craig, R., Allan, G.E., Thackway, R., Frakes, I., Cridland, S., Meyer, C.P. & Gill, A.M. (2007) Bushfires 'down under': patterns and implications of Australian landscape burning. International Journal of Wildland Fire, 16, 361-377.
65. Russell-Smith, J., Whitehead, P.J. & Cooke, P.M. (eds) (2009) Culture, ecology and economy of savanna fire management in northern Australia. CSIRO Publications, Melbourne.
66. Russell-Smith, J., Price, O.F. & Murphy, B.P. (2010a) Managing the matrix: decadal responses of eucalypt-dominated mesic savanna to ambient fire regimes. Ecological Applications, 20, 1615-1632.
67. Russell-Smith, J., Yates, C.P., Brock, C. & Westcott, V. (2010b) Fire regimes and interval-sensitive vegetation in semi-arid Gregory National Park, Northern Territory. Australian Journal of Botany, 58, 300-317.
68. San José, J.J. & Fariñas, M.R. (1991) Temporal changes in the structure of a Trachypogon savanna protected for 25years. Acta Oecologica, 12, 237-247.
69. Sankaran, M., Hanan, N.P., Scholes, R.J. et al. (2005) Determinants of woody cover in African savannas. Nature, 438, 846-849.
70. Sarmiento, G. (1983) The savannas of tropical America. Ecosystems of the world. Vol. 13: Tropical savannas (ed. by F. Bourliere ), pp. 245-288. Elsevier, Amsterdam.
71. Scholes, R.J. & Archer, S.R. (1997) Tree-grass interactions in savannas. Annual Review of Ecology and Systematics, 28, 517-544.
72. Scholes, R.J. & Walker, B.H. (1993) An African savanna: synthesis of the Nylsvley study. Cambridge University Press, Cambridge.
73. Sharp, B.R. & Whittaker, R.J. (2003) The irreversible cattle-driven transformation of a seasonally flooded Australian savanna. Journal of Biogeography, 30, 783-802.
74. Short, P.S., Albrecht, D.E., Cowie, I.D., Lewis, D.L. & Stuckey, B.M. (eds) (2011) Checklist of the vascular plants of the Northern Territory. Available at:
75. Staver, C.A., Archibald, S. & Levin, S. (2011) Tree cover in sub-Saharan Africa: rainfall and fire constrain forest and savanna as alternative stable states. Ecology, 92, 1063-1072.
76. Stocker, G.C. (1966) Aspects of the seeding habits of Callitris intratropica. Forestry and Timber Bureau Leaflet No. 97. Commonwealth of Australia Department of National Development, Canberra.
77. Trapnell, C.G. (1959) Ecological results of woodland burning experiments in northern Rhodesia. Journal of Ecology, 47, 129-168.
78. Walter, H. (1971) Ecology of tropical and subtropical vegetation. Oliver and Boyd, Edinburgh.
79. Ward, D. (2005) Do we understand the causes of bush encroachment in African savannas? African Journal of Range and Forage Science, 22, 101-105.
80. Werner, P.A., Cowie, I.D. & Cusack, J.S. (2006) Impact of feral water buffalo on juvenile trees in savannas of northern Australia: an experimental field study in Kakadu National Park. Australian Journal of Botany, 54, 283-296.
81. Wigley, B.J., Bond, W.J. & Hoffman, M.T. (2010) Thicket expansion in a South African savanna under divergent land use: local vs. global drivers? Global Change Biology, 16, 964-976.
82. Williams, R.J., Gill, A.M. & Moore, P.H.R. (1998) Seasonal changes in fire behaviour in a tropical savanna in northern Australia. International Journal of Wildland Fire, 8, 227-239.
83. 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, 50-59.
84. Williams, R.J., Griffiths, A.D. & Allan, G.E. (2002) Fire regimes and biodiversity in the wet-dry tropical landscapes of northern Australia. Flammable Australia (ed. by R.A. Bradstock, J.E. Williams and A.M. Gill ), pp. 281-304. Cambridge University Press, Cambridge.
85. Williams, R.J., Woinarski, J.C.Z. & Andersen, A.N. (2003) Fire experiments in northern Australia: contributions to ecological understanding and biodiversity conservation in tropical savannas. International Journal of Wildland Fire, 12, 391-402.
86. Woinarski, J.C.Z., Williams, R.J., Price, O. & Rankmore, B. (2005) Landscapes without boundaries: wildlife and their environments in northern Australia. Wildlife Research, 32, 377-388.
87. Woinarski, J.C.Z., Mackey, B., Nix, H. & Traill, B. (2007) The nature of northern Australia: natural values, ecological processes and future prospects. Australian National University Press, Canberra.
88. Woinarski, J.C.Z., Armstrong, M., Brennan, K., Fisher, A., Griffiths, A.D., Hill, B., Milne, D.J., Palmer, C., Ward, S., Watson, M., Winderlich, S. & Young, S. (2010) Monitoring indicates rapid and severe decline of native small mammals in Kakadu National Park, northern Australia. Wildlife Research, 37, 116-126.
89. Woinarski, J.C.Z., Legge, S., Fitzsimons, J.A., Traill, B.J., Burbidge, A.A., Fisher, A., Firth, R.S.C., Gordon, I.J., Griffith, A.D., Johnson, C.N., McKenzie, N.L., Palmer, C., Radford, I., Rankmore, B., Ritchie, E.G., Ward, S. & Ziembecki, M. (2011) The disappearing mammal fauna of Australia: context, cause, and response. Conservation Letters, 4, 192-201.
90. Yates, C.P. & Russell-Smith, J. (2003) Fire regimes and vegetation sensitivity analysis: an example from Bradshaw Station, monsoonal northern Australia. International Journal of Wildland Fire, 12, 349-358.
91. Yates, C.P., Edwards, A.C. & Russell-Smith, J. (2008) Big fires and their ecological impacts in Australian savannas: size and frequency matters. International Journal of Wildland Fire, 17, 768-781.