Grazing ungulates select for grasses growing beneath trees in African savannas

Mammalian Biology

Volumn 76, Issue 3, 2011, Pages 345-350

  Treydte, Anna C ^a   van der Beek, Josha G M ^b   Perdok, Albertien A ^b   van Wieren, Sip E ^b  

^a UNIVERSITY OF HOHENHEIM   (Germany)

^b WAGENINGEN UNIVERSITY   (Netherlands)

Author keywords

Feeding behaviour; Indirect observations; Kruger National Park; Panicum maximum; Woody cover

Indexed keywords

ALLOMETRY; BIOLOGICAL INVASION; FEEDING BEHAVIOR; GRASS; GRAZING PRESSURE; LIGHT AVAILABILITY; SAVANNA; SOIL NUTRIENT; UNDERSTORY; UNGULATE; WATER AVAILABILITY;

KRUGER NATIONAL PARK; SOUTH AFRICA;

AEPYCEROS MELAMPUS; CONNOCHAETES TAURINUS; EQUUS SUBG. HIPPOTIGRIS; PANICUM MAXIMUM; POACEAE; UNGULATA;

EID: 79953161875     PISSN: 16165047     EISSN: 16181476     Source Type: Journal    
DOI: 10.1016/j.mambio.2010.09.003     Document Type: Article

References (58)

1. Altmann J. Observational study of behavior: sampling methods. Behaviour 1974, 49:227-266.
2. Anderson I.J., Brumbaugh M.S., Jackson R.B. Water and tree-understory interactions: a natural experiment in a savanna with oak wilt. Ecology 2001, 82:33-49.
3. Arsenault R., Owen-Smith N. Resource partitioning by grass height among grazing ungulates does not follow body size relation. Oikos 2008, 117:1711-1717.
4. Baretto G.R., Herrera E.A. Foraging patterns of capybaras in a seasonally flooded savanna of Venezuela. J. Trop. Ecol. 1998, 14:87-98.
5. Barnes R.F.W. Effects of elephant browsing on woodlands in a Tanzanian national park: measurements, models and management. J. Appl. Ecol. 1983, 20:521-539.
6. Bell R.H.V. A grazing ecosystem in the Serengeti. Sci. Am. 1971, 225:86-93.
7. Belsky A.J. Influences of trees on savanna productivity: tests of shade, nutrients, and tree-grass competition. Ecology 1994, 75:922-932.
8. Belsky A.J., Amundson R.G., Duxbury J.M., Riha S.J., Ali A.R., Mwonga S.M. The effects of trees on their physical, chemical and biological environments in a semi-arid savanna in Kenya. J. Appl. Ecol. 1989, 26:1005-1024.
9. Belsky A.J., Mwonga S.M., Amundson R.G., Duxbury J.M., Ali A.R. Comparative effects of isolated trees on their undercanopy environments in high- and low-rainfall savannas. J. Appl. Ecol. 1993, 30:142-155.
10. Ben-Shahar R. Selectivity in large generalist herbivores: feeding patterns of African ungulates in a semi-arid habitat. Afr. J. Ecol. 1991, 29:302-315.
11. Ben-Shahar R. The effects of bush-clearance on African ungulates in a semi-arid nature reserve. Ecol. Appl. 1992, 2:95-101.
12. Ben-Shahar R., Coe M.J. The relationships between soil factors, grass nutrients and the foraging behaviour of wildebeest and zebra. Oecologia 1992, 90:422-428.
13. Bothma J.D.P., Rooyen N.V., Du Toit J.G. Antelope and other smaller herbivores. Game Ranch Management 2002, 149-175. Van Schaik Publishers, Pretoria. J.D.P. Bothma (Ed.).
14. Codron D., Lee-Thorp J.A., Sponheimer M., Codron J. Stable carbon isotope reconstruction of ungulate diet changes through the seasonal cycle. S. Afr. J. Wildl. Res. 2009, 37:117-125.
15. Cooper S.M., Owen-Smith N. Effects of plant spinescence on large mammalian herbivores. Oecologia 1986, 67:446-455.
16. Cromsigt J.P.G.M., Prins H.H.T., Olff H. Habitat heterogeneity as a driver of ungulate diversity and distribution patterns: interaction of body mass and digestive strategy. Divers. Distrib. 2009, 15:513-522.
17. Demment M.W., Soest P.J.V. A nutritional explanation for body-size patterns of ruminant and nonruminant herbivores. Am. Nat. 1985, 125:641-672.
18. Drescher M., Heitkönig I.M.A., van den Brink P.J., Prins H.H.T. Effects of sward structure on herbivore foraging behaviour in a South African savanna: an investigation of the forage maturation hypothesis. Aust. Ecol. 2006, 31:76-87.
19. Du Toit J.T., Cumming D.H.M. Functional significance of ungulate diversity in African savannas and the ecological implications of the spread of pastoralism. Biodivers. Conserv. 1999, 8:1643-1661.
20. East R.M., Felker P. Forage production and quality of 4 perennial grasses grown under and outside canopies of mature Prosopis glandulosa Torr. var. glandulosa (mesquite). Agrofor. Syst. 1993, 22:91-110.
21. Eckhardt H.C., Wilgen B.W., Biggs H.C. Trends in woody vegetation cover in the Kruger National Park, South Africa, between 1940 and 1998. Afr. J. Ecol. 2000, 38:108-115.
22. Engeman R.M., Sugihara R.T., Pank L.F., Dusenbery W.E. A comparison of plotless density estimators using Monte Carlo simulation. Ecology 1994, 75:1769-1779.
23. Gertenbach W.P.D. Landscapes of the Kruger National Park. Koedoe 1983, 26:9-121.
24. Grant C.C., Scholes M.C. The importance of nutrient hot-spots in the conservation and management of large wild mammalian herbivores in semi-arid savannas. Biol. Conserv. 2006, 130:426-437.
25. Heitkönig I.M.A., Owen-Smith N. Seasonal selection of soil types and grass swards by roan antelope in a South African savanna. Afr. J. Ecol. 1998, 36:57-70.
26. Kassilly F.N. Forage quality and camel feeding patterns in Central Baringo, Kenya. Livest. Prod. Sci. 2002, 78:175-182.
27. Kie J.G. Optimal foraging and risk of predation: effects on behaviour and social structure in ungulates. J. Mammal. 1999, 80:1114-1129.
28. Kingdon J. African Mammals 2001, Academic Press, San Diego.
29. Kleiber M. The Fire of Life: An Introduction to Animal Energetics 1961, Wiley, New York.
30. Lamprey H.F. Ecological separation of large mammalian species in the Tarangire Game Reserve, Tanganyika. E. Afr. Wildl. J. 1964, 63-92.
31. Leuthold W. Recovery of woody vegetation in Tsavo National Park, Kenya, 1970-94. Afr. J. Ecol. 1996, 34:101-112.
32. Lewis D.M. Disturbance effects on elephant feeding: evidence for compression in Luangwa Valley, Zambia. Afr. J. Ecol. 1986, 24:227-241.
33. Low A.B., Rebelo A.G. Vegetation of South Africa, Lesotho and Swaziland: a companion to the vegetation map of South Africa, Lesotho and Swaziland 1996, Department of Environmental Affairs and Tourism, Pretoria.
34. Ludwig F., Dawson T.E., Kroon H., Berendse F., Prins H.H.T. Hydraulic lift in Acacia tortilis trees on an East African savanna. Oecologia 2003, 134:293-300.
35. Ludwig F., Kroon H., Berendse F., Prins H.H.T. The influence of savanna trees on nutrient, water and light availability and the understorey vegetation. Plant Ecol. 2004, 170:93-105.
36. Main M.B., Weckerly F.W., Bleich V.C. Sexual segregation in ungulates: new directions for research. J. Mammal. 1996, 77:449-461.
37. Mitlöhner F.M., Morrow-Tesch J.L., Wilson S.C., Dailey J.W., McGlone J.J. Behavioral sampling techniques for feedlot cattle. J. Anim. Sci. 2001, 79:1189-1193.
38. Mobæk R., Narmo A.K., Moe S.R. Termitaria are focal feeding sites for large ungulates in Lake Mburo National Park, Uganda. J. Zool. 2005, 267:97-102.
39. Mysterud A. The relationship between ecological segregation and sexual body size dimorphism in large herbivores. Oecologia 2000, 124:40-54.
40. Okello M.M., Wishitemi R.E.L., Muhoro F. Forage intake rates and foraging efficiency of free-ranging zebra and impala. S. Afr. J. Wildl. Res. 2002, 32:93-100.
41. Owen-Smith N. Adaptive Herbivore Ecology 2002, Cambridge University Press, Cambridge.
42. Picard N., Kouyaté A.M., Dessard H. Tree density estimations using a distance method in Mali savanna. For. Sci. 2005, 51:7-18.
43. Pollard J.H. On distance estimators of density in randomly distributed forests. Biometrics 1971, 27:991-1002.
44. Reynolds J.F., Virginia R.A., Kemp P.R., Soyza A.G., Tremmel D.C. Impact of drought on desert shrubs: effect of seasonality and degree of resource island development. Ecol. Monogr. 1999, 69:69-106.
45. Ruckstuhl K.E., Neuhaus P. Sexual segregation in ungulates: a comparative test of three hypotheses. Biol. Rev. 2002, 77:77-96.
46. Sandor B.I. Engineering Mechanics Statics and Dynamics 1987, Prentice-Hall, Inc., New Jersey.
47. Scholes R.J., Archer S.R. Tree-grass interactions in savannas. Ann. Rev. Ecol. Syst. 1997, 28:517-544.
48. Traill L.W. Seasonal utilization of habitat by large grazing herbivores in semi-arid Zimbabwe. S. Afr. J. Wildl. Res. 2004, 34:13-24.
49. Treydte A.C., Grant C.C., Jeltsch F. Tree size and herbivory determine below-canopy grass quality and species composition in savannahs. Biodivers. Conserv. 2009, 18:3989-4002.
50. Treydte A.C., Halsdorf S.A., Weber E., Edwards P.J. Habitat preferences of the warthog on a former cattle ranch in Tanzania. J. Wildl. Manage. 2006, 70:1285-1292.
51. Treydte A.C., Heitkönig I.M.A., Ludwig F. Modelling ungulate dependence on higher quality forage under large trees in African savannahs. Basic Appl. Ecol. 2009, 10:161-169.
52. Treydte A.C., Heitkönig I.M.A., Prins H.H.T., Ludwig F. Trees enhance grass layer quality in African savannas of distinct rainfall and soil fertility. Perspect. Plant Ecol. Evol. 2007, 8:197-205.
53. Treydte A.C., Looringh van Beeck F., Ludwig F., Heitkönig I.M.A. Improved beneath-crown grass quality in South African savannas varying locally and over season. J. Veg. Sci. 2008, 19:663-670.
54. van Oudtshoorn F. Guide to Grasses of Southern Africa 2004, Briza Publications, Pretoria.
55. Venter F.J. Soil patterns associated with the major geological units of the Kruger National Park. Koedoe 1986, 29:125-138.
56. Weltzin J.F., Coughenour M.B. Savanna tree influence on understory vegetation and soil nutrients in Northwestern Kenya. J. Veg. Sci. 1990, 325-332.
57. Wilmshurst J.F., Fryxell J.M., Farm B.P., Sinclair A.R.E., Henschel C.P. Spatial distribution of Serengeti wildebeest in relation to resources. Can. J. Zool. 1999, 77:1223-1232.
58. Wronski T. Feeding ecology and foraging behaviour of impala Aepyceros melampus in Lake Mburo National Park, Uganda. Afr. J. Ecol. 2002, 40:205-211.