Evaluation of strategies for tracking climatic variation in semi-arid grazing systems

Agricultural Systems

Volumn 57, Issue 3, 1998, Pages 381-398

  Illius, A W ^a   Derry, J F ^a   Gordon, I J ^b  

^a UNIVERSITY OF EDINBURGH   (United Kingdom)

^b SCOTTISH CROP RESEARCH INSTITUTE   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

DROUGHT; GRAZING; SEMIARID REGION; WATER MANAGEMENT;

EID: 0032122978     PISSN: 0308521X     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0308-521X(98)00025-0     Document Type: Article

References (24)

1. Behnke, R. (1992) New directions in African range management policy. Pastoral Development Network Paper 32c. Overseas Development Institute, London.
2. Behnke, R. H. and Kerven, C. (1994) Redesigning for risk: tracking and buffering environmental variability in Africa's rangelands. Natural Resource Perspectives, No. 1. Overseas Development Institute, London.
3. Behnke, R. H. and Scoones, I. (1993) Rethinking range ecology: implications for rangeland management in Africa. In Range Ecology at Disequilibrium, eds R. H. Behnke, I. Scoones and C. Kerven, pp. 1-30. Overseas Development Institute, London.
4. Derry, J. F. (1998) Modelling ecological interaction despite object-oriented modularity. Ecological Modelling 107, 145-158.
5. Dye, P. J. (1983) Prediction of variation in a semi-arid induced grassland. PhD thesis, University of the Witwatersrand, Johannesburg.
6. Dye, P. J. and Walker, B. H. (1987) Patterns of shoot growth in a semi-arid grassland in Zimbabwe. Journal of Applied Ecology 24, 633-644.
7. Ellis, J. E. and Swift, D. M. (1988) Stability of African pastoral ecosystems: alternate paradigms and implications for development. Journal of Range Management 41, 450-459.
8. Fritz, H. and Duncan, P. (1994) On the carrying capacity for large ungulates of African savanna ecosystems. Proceedings of the Royal Society, London, Series B 256, 77-82.
9. Hatch, G. P. and Stafford Smith, D. M. (1997) The bioeconomic implications of various drought management strategies for a communal cattle herd in the semi-arid savanna of KwaZulu-Natal. African Journal of Range and Forage Science 14, 17-25.
10. Hodgkinson, K. (1994) Tactical grazing can maintain stability of semi-arid wooded grasslands. In Proceedings of the 17th International Grassland Congress, Palmerston North, New Zealand, pp. 75-76.
11. Illius, A. W. and Gordon, I. J. (1987) The allometry of food intake in grazing ruminants. Journal of Animal Ecology 56, 989-999.
12. Illius, A. W. and Gordon, I. J. (1991) Prediction of intake and digestion in ruminants by a model of rumen kinetics integrating animal size and plant characteristics. JJournal of Agricultural Science, Cambridge 116, 145-157.
13. Illius, A. W. and Gordon, I. J. (1992) Modelling the nutritional ecology of ungulate herbivores: evolution of body size and competitive interactions. Oecologia (Berlin) 89, 428-434.
14. Illius, A. W. and Gordon, I. J. (1998) Scaling up from functional response to numerical response in vertebrate herbivores. In Herbivores, Plants and Predators, eds H. Olff, V. K. Brown and R. H. Drent. Blackwell Science, Oxford (in press).
15. Lande, R., Engen, S. and Sæther, B.-E. (1995) Optimal harvesting of fluctuating populations with a risk of extinction. American Naturalist 145, 728-745.
16. McLeod, S. R. (1997) Is the concept of carrying capacity useful in variable environments? Oikos 79, 529-542.
17. Poupon, H. (1976) La biomasse et l'évolution da sa répartition au cours de la croissance d''Acacia senegal dans une savane sahelienne (Sénégal). Bois et Forêts des Tropiques 166, 23-38.
18. Rutherford, M. C. (1984) Relative allocation and seasonal phasing of growth of woody plant components in a South African savanna. Progress in Biometeorology 3, 200-221.
19. Sandford, S. (1994) Improving the efficiency of opportunism: new directions for pastoral development. In Living with Uncertainty: New Directions in Pastoral Development in Africa, ed. I. Scoones, pp. 174-182. Intermediate Technology, London.
20. Scoones, I. (1994) New directions in pastoral development in Africa. In Living with Uncertainty: New Directions in Pastoral Development in Africa, ed, I. Scoones, pp. 1-36. Intermediate Technology, London.
21. Scoones, I. (1995) Exploiting heterogeneity: habitat use by cattle in dryland Zimbabwe. Journal of Arid Environments 29, 221-237.
22. Spalinger, D. E. and Hobbs, N. T. (1992) Mechanisms of foraging in mammalian herbivores: new models of functional response. American Naturalist 140, 325-348.
23. Stafford Smith, M. and Foran, B. (1992) An approach to assessing the economic risk of different drought management tactics on a South Australian pastoral sheep station. Agricultural Systems 39, 83-105.
24. Toulmin, C. (1994) Tracking through drought: options for destocking and restocking. In Living with Uncertainty: New Directions in Pastoral Development in Africa, ed. I. Scoones, pp. 95-115. Intermediate Technology, London.