Vegetation structure of a heavily grazed range in northern Kenya: Tree and shrub canopy

Journal of Arid Environments

Volumn 36, Issue 2, 1997, Pages 291-306

  Schultka, Wolfgang ^a   Cornelius, Reiner ^b  

^a JUSTUS LIEBIG UNIVERSITY   (Germany)

^b TECHNISCHE UNIVERSITÄT BERLIN   (Germany)

Author keywords

Herbivore pressure; Increase of Acacia species; Northern Kenya; Semi arid rangeland; Thicket formation; Woody canopy

Indexed keywords

BUSHLAND; GRAZING; RANGELAND; SEMI-ARID VEGETATION; SHRUBLAND; THICKET; WOODLAND;

KENYA;

ACACIA HORRIDA; ACACIA MELLIFERA; ACACIA PAOLII; ACACIA REFICIENS; ACACIA TORTILIS; ASTERACEAE; BURSERACEAE; CAPPARACEAE; COMMIPHORA AFRICANA; GREWIA; LIPPIA CARVIODORA; MIMOSACEAE; VERBENACEAE; VERNONIA CINERASCENS;

EID: 0031150347     PISSN: 01401963     EISSN: None     Source Type: Journal    
DOI: 10.1006/jare.1996.0208     Document Type: Article

References (32)

1. Agnew, A.D.Q. & Waterman, P.G. (1989). Drought-deciduous woodland in Kora National Reserve, Kenya. Journal of African Ecology, 27: 53-62.
2. Barkham, J.P. & Rainy, M.E. (1976). The vegetation of Samburu-Isiolo Game Reserve. East African Wildlife Journal, 14: 297-329.
3. Brenan, J.P.M. (1959). Mimosaceae. Flora of Tropical East Africa. London: Whitefriars Press Ltd. 173 pp.
4. Bronner, G. (1990). Vegetation and land use in the Mathews Range area, Samburu-District, Kenya. Dissertationes Botanicae, 160: 182 pp.
5. Coppock, D.L., Ellis, J.E. & Swift, M.D. (1986). Livestock feeding ecology and resource utilization in a nomadic pastoral ecosystem. Journal of Applied Ecology, 23: 573-583.
6. Cornelius, R. & Schultka, W. (in press). Vegetation structure of a heavily grazed range in Northern Kenya. II. The herb layer. Journal of Arid Environments.
7. Ellis, J. (1995). Climate variability and complex ecosystem dynamics: implication for pastoral development. In: Scoones, I. (Ed.), Living with Uncertainty. New directions in pastoral development in Africa, pp. 37-46. London: Intermediate Technology Publications.
8. Hayashi, I. (1992). A preliminary report of an experiment on vegetation recovery of drought deciduous woodland in Kitui, Kenya. Journal of African Ecology, 30: 1-9.
9. Heine, B., Heine, I. & König, C. (1988). Plant concepts and plant use. An Ethnobotanical survey of the semi-arid and arid lands of East Africa. Part IV, Plants of the Samburu (Kenya). Kölner Beiträge zur Entwicklungsländerforschung Series 10. Saarbrücken, Fort Lauderdale: Breitenbach Publishers. 286 pp.
10. Herlocker, D. (1979). Vegetation of southwestern Marasabit District, Kenya. Technical report D1. Integrated project in arid lands (MAB), Nairobi: United Nations Environment Programme (UNEP). 68 pp.
11. Klötzli, F. (1980). Analysis of species oscillation in tropical grasslands in Tanzania due to management and weather conditions. Phytocoenologia, 8: 13-33.
12. Knapp, R. (1973). The Vegetation of Africa. Stuttgart: Fischer. 626 pp.
13. Lechner-Doll, M., Rutawenga, T., Schwartz, H.J., Schultka, W. & Engelhardt, V.W. (1990). Seasonal changes of ingesta mean retention time and forestomach fluid volume in camels, cattle, sheep and goats grazing a thornbush savannah pasture in Kenya. Journal of Agricultural Science, 115: 409-420.
14. Mäckel, R. & Schultka, W. (1988). Vegetationsänderung und Morphodynamik im Ngare Ndare-Gebiet, Kenia. Abhandlungen der Akademie der Wissenschaften in Göttingen, 41: 253-276.
15. McNaughton, S.J. (1983). Serengeti grassland ecology: The role of composite environmental factors and contingency in community organization. Ecological Monographs, 53: 291-320.
16. Mueller-Dombois, D. & Ellenberg, H. (1974). Aims and Methods of Vegetation Ecology. New York: John Wiley & Sons. 547 pp.
17. Mwalyosi, R.B.B. (1990). The dynamic ecology of Acacia Tortilis woodland in Lake Manyara National Park, Tanzania. African Journal of Ecology, 28: 189-199.
18. Noy-Meir, I. (1974). Multi-variate analysis of the semi-arid vegetation in southeastern Australia, II. Vegetation catenae and environmental gradients. Australian Journal of Botany, 22: 115-140.
19. Pratt, D.J. & Gwynne, M.D. (1977). Rangeland Management and Ecology in East Africa. London: Hodder & Stoughton. 30 pp.
20. Schmidt, W. (1975). Plant communities on permanent plots of the Serengeti plains. Vegetatio, 30: 133-145.
21. Scholte, P.T. (1992). Leaf litter and Acacia pods as feed for livestock during dry season in Acacia-Commiphora bushland, Kenya. Journal of Arid Environments, 22: 271-276.
22. Schultka, W. (1988). Marsabit District, Vegetation Map. Ministry of livestock development. Nairobi: German Agricultural Team, GTZ.
23. Schwartz, H.J. (1988). Improving the utilization of natural pastures in arid areas of Africa through multiple species grazing systems. In: Weniger, J.H. (Ed.), Highlights of German Research Projects in the Tropics and Subtropics, pp. 33-44. Berlin: ITC-GmbH. 114 pp.
24. Schwartz, H.J. (1993). Range unit inventory for Isiolo district. In: Schwartz, H.J., Shaabani, S. & Walther, D. (Eds), Range Management Handbook of Kenya, Vol II, 5, pp. 91-116. Nairobi: Kenya Government Printer. 158 pp.
25. Schwartz, H.J. & Walsh, M.G.H. (1993). Range unit inventory for Samburu district. In: Schwartz, H.J., Shaabani, S. & Walther, D. (Eds), Range Management Handbook of Kenya, Vol II, 2, pp. 85-117. Nairobi: Kenya Government Printer. 138 pp.
26. Walter, H. (1954). Die Vertuschung der Tropischen Savannengebiete und ihre ökologische Ursache. Vegetatio, 5/6: 6-10.
27. White, F. (1965). The savanna woodlands of the Zambesian and Sudanian Domains. An ecological and phytogeographical comparison. Webbia, 19: 651-681.
28. White, F. (1983). The Vegetation of Africa. A descriptive memoir to accompany the UNESCO/ AETFAT/UNECSO vegetation map of Africa. Paris: UNESCO. 386 pp.
29. Wickens, G.E. (1976). The flora of Jebel Marra (Sudan Republic) and its geographical affinities. Kew Bulletin Additional Series, V: 368 pp.
30. Wildi, O. (1989). A new numerical solution to traditional phytosociological tabular classification. Vegetatio, 81: 95-106.
31. Wildi, O. & Orloci, L. (1983). Management and multivariate analysis of vegetation data (2nd Edn). Eidgenössische Anstalt für das forstliche Versuchswesen Report 215. Birmensdorf, Swiss: Eidgenossis Mustalt. 139 pp.
32. Wyant, J.G. & Ellis, J.E. (1990). Compositional patterns of riparian woodlands in the Rift valley of northern Kenya. Vegetatio, 89: 23-27.