Rainfall pattern and nutrient content influences on African elephants' debarking behaviour in Samburu and Buffalo Springs National Reserves, Kenya

African Journal of Ecology

Volumn 50, Issue 2, 2012, Pages 152-159

  Ihwagi, Festus Wanderi ^a,b   Chira, Robert Mutugi ^b   Kironchi, Geoffrey ^b   Vollrath, Fritz ^c   Douglas Hamilton, Iain ^a,c  

^a SAVE THE ELEPHANTS   (Kenya)

^b UNIVERSITY OF NAIROBI   (Kenya)

^c UNIVERSITY OF OXFORD   (United Kingdom)

Author keywords

Debarking; Elephants; Nutrient content; Rainfall

Indexed keywords

BEHAVIORAL ECOLOGY; CORRELATION; ELEPHANT; ENVIRONMENTAL MONITORING; MAGNITUDE; METAL; NUTRIENT AVAILABILITY; PROTEIN; RAINFALL; SEASONAL VARIATION;

BUFFALO SPRINGS NATIONAL RESERVE; EASTERN PROVINCE [KENYA]; KENYA; RIFT VALLEY; SAMBURU;

ACACIA; ACACIA ELATIOR; ACACIA TORTILIS; ELEPHANTIDAE; LOXODONTA;

EID: 84859582127     PISSN: 01416707     EISSN: 13652028     Source Type: Journal    
DOI: 10.1111/j.1365-2028.2011.01305.x     Document Type: Article

References (41)

1. Anderson, J.M. & Ingram, J.S.I. (1989) Tropical Soil Biology and Fertility: A Handbook of Methods. CAB International, Wallingford, U.K.
2. Barkham, J.P. & Rainy, M.E. (1976) The vegetation of the Samburu-Isiolo Game Reserve. Afr. J. Ecol. 14, 297-329.
3. Barnes, R.F.W. (1982) Elephant feeding behavior in Ruaha National Park, Tanzania. Afr. J. Ecol. 20, 123-136.
4. Belovsky, G.E. (1997) Optimal foraging and community structure: the allometry of herbivore food selection and competition. Evol. Ecol. 11, 641-672.
5. Ben-Shahar, R. (1993) Patterns of elephant damage to vegetation in northern Botswana. Biol. Conserv. 65, 249-256.
6. Ben-Shahar, R. (1996) Do elephants overutilize Mopame woodlands in Botswana? J. Trop. Ecol. 12, 505-515.
7. Buechner, H.K. & Dawkins, H.C. (1961) Vegetation change induced by elephants and fire in Murchison Fall National Park, Uganda. Ecology 42, 752-766.
8. Croze, H. (1974) The Seronera bull problem. E. Afr. Wildl. J. 12, 1-27.
9. Dougall, H.W., Drysdale, V.M. & Glover, P.E. (1964) The chemical composition of Kenya browse and pasture herbage. E. Afr. Wildl. J. 2, 86-121.
10. Gadd, M.E. (2002) The impact of elephants on the marula tree, Sclerocarya birrea. Afr. J. Ecol. 40, 328-336.
11. Georgiadis, J.H. & McNaughton, S.J. (1990) Elemental and fibre contents of savanna grasses: variation with grazing, soil type, season and species. J. Appl. Ecol. 27, 623-634.
12. Hiscocks, K. (1999) The impact of an increasing elephant population on the woody vegetation in southern Sabi Sand Wildtuin, South Africa. Koedoe 42, 47-55.
13. Holdo, R.M. (2003) Woody plant damage by African elephants in relation to leaf nutrients in western Zimbabwe. J. Trop. Ecol. 19, 189-196.
14. Ihwagi, F.W. (2007) Forage Quality and Bark Utilization by the African Elephant (Loxodonta africana) in Samburu and Buffalo Springs National Reserves, Kenya. MSc thesis, University of Nairobi, Kenya.
15. Ihwagi, F.W., Vollrath, F., Chira, R.M., Douglas-Hamilton, I. & Kironchi, G. (2009) The impact of elephants, Loxodonta africana, on woody vegetation through selective debarking in Samburu and Buffalo Springs National Reserves, Kenya. Afr. J. Ecol. 48, 87-95.
16. Jachmann, H. (1989) Food selection by elephants in the 'miombo' biome in relation to leaf chemistry. Biochem. Syst. Ecol. 17, 15-24.
17. Jaetzold, R. (1983) Farm Management Handbook of Kenya Ministry of Agriculture, Nairobi.
18. Kahindi, O., Wittemyer, G., King, J., Ihwagi, F., Omondi, P. & Douglas-Hamilton, I. (2009) Employing participatory surveys to monitor the illegal killing of elephants across diverse land uses in Laikipia-Samburu, Kenya. Afr. J. Ecol. 48, 972-983.
19. Kane, P.F. (1987) Comparison of HgO andCuSO4/TiO2 as catalysts in manual Kjeldahl digestion for determination of crude protein in animal feed: collaborative study. J. Assoc. Off. Anal. Chem. 70, 907-911.
20. Malan, J.W. & Van Wyk, A.E. (1993) Bark structure and preferential bark utilization by the African elephant. IAWA J. 14, 173-185.
21. Malpas, R.C. (1977) Diet and the condition and growth of elephants in Uganda. J. Appl. Ecol. 14, 489-504.
22. Mattson, W.J. (1980) Herbivory in relation to plant nitrogen content. Annu. Rev. Ecol. Syst. 11, 119-161.
23. McCullagh, K.G. (1969) The growth and nutrition of the African elephant (1) Seasonal variations in the rate of growth and the urinary excretion of hydroxyproline. The chemical nature of the diet. E. Afr. Wildl. J. 7, 85-90.
24. McNaughton, S.J. & Georgiadis, N.J. (1986) Ecology of African grazing and browsing mammals. Annu. Rev. Ecol. Syst. 17, 39-65.
25. Meissner, H.H. & Spreeth, E.B. (1990) Quality of food and voluntary intake by elephant as measured by lignin index. S. Afr. Tydskr. Natuurnav. 20, 104-110.
26. O'Connor, T.G., Goodman, P.S. & Clegg, B. (2007) A functional hypothesis of the threat of local extirpation of woody plant species by elephant in Africa. Biol. Conserv. 136, 329-345.
27. Owen-Smith, R.N. (1988) Megaherbivores. The Influence of Very Large Body Size on Ecology. Cambridge University, Cambridge.
28. Pamo, E.T. & Tchamba, M.N. (2001) Elephants and vegetation change in the Sahelo-Soudanian region of Cameroon. J. Arid Environ. 48, 243-253.
29. Ramsey, P.H. (1980) Exact type I error rates for robustness of Student's t test with unequal variances. J. Educ. Stat. 5, 337-349.
30. Ruess, R.W. & Halter, F.L. (1990) The impact of large herbivores on the Seronera woodlands, Serengeti National Park, Tanzania. Afr. J. Ecol. 28, 259-275.
31. Samburu-Isiolo Conservation Area (SICA) General Management Plan 2010-2020 (2010) A joint management plan for Samburu, Buffalo Springs and Shaba National Reserves by Isiolo and Samburu County Councils. Unpublished.
32. Smallie, J.J. & O'Connor, T.G. (2000) Elephant utilization of Colophospermum mopane: possible benefits of hedging. Afr. J. Ecol. 38, 352-359.
33. Styles, C.V. & Skinner, J.D. (2000) The influence of large mammalian herbivores on growth form and utilization of mopane trees, Colophospermum mopane, in Botswana's Northern Tuli Game Reserve. Afr. J. Ecol. 38, 95-101.
34. SYSTAT. (1998) SYSTAT 9.0: Statistics. SPSS, Chicago.
35. Vesey-FitzGerald, D.F. (1973) Animal impact on vegetation and plant succession in Lake Manyara National Park, Tanzania. Oikos 24, 314-325.
36. Vollrath, F. & Douglas-Hamilton, I. (2002) African bees to control African elephants. Naturwissenschaften 89, 508-511.
37. Walker, B.H. (1976) An approach to the monitoring of changes in the composition and utilization of woodland and savanna vegetation. S. Afr. J. Wildl. Res. 6, 1-32.
38. Westoby, M. (1974) An analysis of diet selection by large generalist herbivores. Am. Nat. 108, 290-304.
39. Wittemyer, G. (2001) The elephant population of Samburu and Buffalo Springs National Reserves, Kenya. Afr. J. Ecol. 39, 357-365.
40. Wittemyer, G., Daballen, D., Rasmussen, H.B., Kahindi, O. & Douglas-Hamilton, I. (2005) Demographic status of elephants in the Samburu and Buffalo Springs National Reserves, Kenya. Afr. J. Ecol. 43, 44-47.
41. Zar, J.H. (1996) Biostatistical Analysis. Prentice Hall, NJ, U.S.A.