Convex Relationships in Ecosystems Containing Mixtures of Trees and Grass

Environmental and Resource Economics

Volumn 26, Issue 4, 2003, Pages 559-574

  Scholes, R J ^a  

^a DSI CSIR Nanotechnology Innovation Centre   (South Africa)

Author keywords

Competition; Primary productivity; Resilience; Savannas

Indexed keywords

ECONOMIC AND SOCIAL EFFECTS; FIRES; FORESTRY; FUELS;

PHENOLOGY;

ECOSYSTEMS;

GRASS; PRIMARY PRODUCTION; PRODUCTIVITY; RESILIENCE; SAVANNA; TREE;

POACEAE;

EID: 0347302948     PISSN: 09246460     EISSN: None     Source Type: Journal    
DOI: 10.1023/B:EARE.0000007349.67564.b3     Document Type: Article

References (24)

1. Anderies, M., M. A. Janssen and B. H. Walker (2002), 'Grazing Management, Resilience and the Dynamics of a Fire Driven Rangeland', Ecosystems 5, 23-44.
2. Aucamp, A. J., J. E. Dankwerts, W. R. Teague and J. J. Venter (1983), 'The Role of Acacia karroo in the False Thorveld of the Eastern Cape', Journal of the Grassland Society of Southern Africa 8, 151-154.
3. Beale, I. F. (1973), 'Tree Density Effects on Yields of Herbage and Tree Components in Southe-west Queensland Mulga (Acacia aneura F. Meull.) Scrub. Tropical Grasslands 7, 135-142.
4. Belsky, A. J., S. M. Mwonga, R. G. Amundson, J. M. Duxbury and A. R. Ali (1993), 'Comparative Effects of Isolated Trees on Their Undercanopy Environments in High and Low Rainfall Savannas', Journal of Applied Ecology 30, 143-155.
5. de Villiers, G. du T. (1981), 'Net Rainfall and Interception Losses in a Burkea africana-Ochna pulchra Tree Savanna', Water SA 7, 4-25.
6. Donaldson, C. M. and D. M. Kelk (1970), 'An Investigation of the Veld Problems of the Molopo Area. 1. Early Findings', Proceedings of the Grassland Society of Southern Africa 1, 27-32.
7. Groot, J. J. R. and A. Soumare (1995), Root Distribution of Acacia seyal and Sclerocarya birrea in Sahelian Rangelands', Agroforestry Today 7, 9-11.
8. Knoop, W. T. and B. H. Walker (1984), 'Interactions of Woody and Herbaceous Vegetation in Two Savanna Communities at Nylsvley', Journal of Ecology 73, 235-253.
9. le Houerou, H. N. (1984), 'Rain Use Efficiency: A Unifying Concept in Arid Land Ecology', Journal of Arid Environments 7, 213-247.
10. Rutherford, M. C. (1980), 'Annual Plant Production-precipitation Relations in Arid and Semi-arid Regions', South African Journal of Science 76, 53-56.
11. Scholes, R. J. (1988), Response of Three Semi-arid Savannas on Contrasting Soils to Removal of the Woody Component. PhD thesis, University of the Witwatersrand, Johannesburg.
12. Scholes, R. J. (1993), 'Nutrient Cycling in Semi-arid Grasslands and Savannas: Its Influence on Pattern, Productivity and Stability', Proceedings of the XVH International Grassland Congress (pp. 1331-1334). Palmerston North: International Grasslands Society.
13. Scholes, R. J. (1997), 'Savanna', in R. M. Cowling, D. M. Richardson and S. M. Pierce, eds., Vegetation of southern Africa (pp. 258-277). Cambridge: Cambridge University Press.
14. Scholes, R. J. and S. Archer (1997), Tree-grass Interactions in Savannas', Annual Review of Ecology and Systematics 28, 517-544.
15. Scholes, R. J., P. G. H. Frost and Yuhong Tian (2002), 'Canopy Structure in Savannas along a Moisture Gradient on Kalahari Sands', Global Change Biology (in press).
16. Scholes, R. J. and D. O. Hall (1996), 'The Carbon Budget of Tropical Grasslands, Savannas and Woodland', in A. I. Breymeyer, D. O. Hall, J. M. Melillo and G. I. Agren, eds., Global Change: Effects on Coniferous Forests and Grasslands (pp. 69-100). SCOPE 1996. New York: John Wiley.
17. Scholes, R. J. and B. H. Walker (1993), An African Savanna: Synthesis of the Nylsvley Study. Cambridge: Cambridge University Press.
18. Trollope, W. S. W. and A. L. F. Potgieter (1985), 'Fire Behaviour in the Kruger National Park', Proceedings of the Grassland Society of Southern Africa 2, 17-23.
19. van Noordwijk, M., G. Lawson, A. Soumare, J. J. R. Groot and K. Hairiah (1996), 'Root Distribution of Trees and Crops: Competition and/or Complementarity', in C. K. Ong and P. Huxley, eds., Tree-Crop Interactions: A Physiological Approach (pp. 319-364). Walingford: CAB International.
20. van Wilgen, B. W. (1986), 'A Simple Relationship for Estimating the Intensity of Fires in Natural Vegetation', South African Journal of Botany 52, 384-385.
21. Walker, B. H., D. Ludwig, C. S. Holling and R. S. Peterman (1981), 'Stability of Semi-arid Savanna Grazing Systems', Journal of Ecology 69, 473-498.
22. Walker, B. H. and I. Noy-Meir (1982), 'Aspects of the Stability and Resilience of Savanna Ecosystems', in B. J. Huntley and B. H. Walker, eds., Ecology of Tropical Savannas (pp. 556-609). Berlin: Springer.
23. Walker, J., R. M. Moore and J. A. Robertson (1972), 'Herbage Response to Tree and Shrub Thinning in Eucalyptus populnea Shrub Woodlands', Australian Journal of Agricultural research 23, 405-410.
24. Walter, H. (1971), Ecology of Tropical and Subtropical Vegetation. Edinburgh: Oliver & Boyd.