Rate and pattern of bush encroachment in Eastern Cape savanna and grassland

African Journal of Range and Forage Science

Volumn 16, Issue 1, 1999, Pages 26-31

  O'Connor, T G ^a   Crow, V R T ^a  

^a UNIVERSITY OF KWAZULU NATAL   (South Africa)

Author keywords

AERIAL PHOTOGRAPHS; WOODY INVASION

Indexed keywords

EID: 0007706259     PISSN: 10220119     EISSN: 17279380     Source Type: Journal    
DOI: 10.2989/10220119909485715     Document Type: Article

References (25)

1. Acocks JPH 1953. Veld Types of South Africa. Memoirs of the Botanical Survey of South Africa 57.
2. Archer S, Scifires C, Bassham CR, Maggio R 1988 Autogenic succession in a subtropical savanna: rates, dynamics and processes in the conversion of a grassland to a thorn woodland. Ecological Monographs 12:25-51.
3. Comins DM 1962. The vegetation of the districts of the East London and King Williams Town, Cape Province. Memoirs of the Botanical Survey of South Africa 33.
4. Danckwerts JE & Stuart-Hill GC 1988. The effect of severe drought and management after drought on the mortality and recovery of scmi-arid grassvcld. Journal of the Grassland Society of Southern Africa 5:218-222.
5. Du Toit PF 1967. Bush encroachment with specific reference to Acacia karroo encroachment. Proceedings of the Grassland Society of Southern Africa 2:119-126.
6. Du Toit PF 1972a. Acacia karroo intrusion: the effect of burning and sparing. Proceedings of the Grassland Society of Southern Africa 7:23-27.
7. Du Toit PF 1972b. The goal in a bush-grass community. Proceedings of the Grassland Society of Southern Africa 7:44-50.
8. Jarvel LC & O'Connor TG 1999. Bushclump-grass interactions: influence of bushclumps on their local environment in a south-east African savanna. African Journal of Range & Forage Science 16:32-43.
9. Jury MR & Levey K 1993. The Eastern Cape drought. Water SA 19:133-137.
10. O'Connor TG 1994. Composition and population responses of an African savanna grassland to rainfall and grazing. Journal of Applied Ecology 31:155-171.
11. O'Connor TG 1995. Acacia karroo invasion of grassland: environmental and biotic effects influencing seedling emergence and establishment. Oecologia 103:214-223
12. Pol ley HW, Johnson HB & Mayeux HS 1994. Increasing C02: comparative responses of the C4 grass Schizachvrium and grassland invader Prosopis. Ecology 75:976-988.
13. Prins HHT & Van der Jeugd HP 1993. Herbivore population crashes and woodland structure in East Africa Journal of Ecology 81:305-314.
14. Richardson DM, Williams PA, Hobbs RJ 1994. Pine invasions in the southern hemisphere: determinants of spread and invasibility. Journal of Biogeography 21:511-527.
15. Roques KG, O'Connor TG & Watkinson AR in press. Dynamics of shrub encroachment in an African savanna: relative influences of fire, herbivory. rainfall and density-dependence. Journal of Applied Ecology.
16. Scanlan JC & Archer S 1991. Simulated dynamics of succession in a North American subtropical Prosopis savanna. Journal of Vegetation Science 2:625-634.
17. South African Committee for Stratigraphy 1980. Stratigraphy of South Africa Handbook 8. Government Printer. Pretoria.
18. Story R 1952. A botanical survey' of the Keiskamma-hock district Memoirs of the Botanical Survey of South Africa 27.
19. Stuart-Hill GC 1987. Refinement of a model describing forage production, aninmal production and profitability as a function of bush density in the False Thomveld of the eastern Cape. Journal of the Grassland Society of Southern Afnca 4:18-24.
20. Trollope WSW 1980. Controlling bush encroachment with fire in the savanna areas of southern Africa. Proceedings of the Grassland Society of Southern Africa 15:173-177.
21. Trollope WSW & Tainton NM 1986. EEfect of fire intensity on the grass and bush components of the eastern Cape thomveld. Journal of the Grassland Society of Southern Africa 3:37-42.
22. Usher MB 1981. Modelling ecological succession, with particular reference to Markov models. Vegetatio 46:11-18.
23. Van Vcgtcn JA 1983. Thombush invasion in a savanna ecosystem in eastern Botswana. Vegetatio 56.3-7.
24. Walker BH 1976. An approach to the monitoring of changes in the composition and utilization of woodland and savanna vegetation. South African Journal of Wildlife Research 6:1-32.
25. Walker BH 1979. Game ranching in southern and cast Africa. In: Walker BH (ed.). Management of semi-arid ecosystems. Elsevier, Amsterdam, pp. 55-82.