Patterns of plant selection by grazing cattle in two savanna grasslands: A plant's eye view

References

• Allden , W.G. and Whittaker , I.A. McD. 1970 . The determinants of herbage intake by grazing sheep: the interrelationship of factors influencing herbage intake and availability . Aust. J. Agric. Res. , 21 : 755 – 766 .
   Google Scholar
• Bakker , J.P. , Leeuw , J. de and Van Wieren , S.E. 1983 . Micro‐patterns in grassland vegetation created and sustained by sheep grazing . Vegetatio , 55 : 153 – 161 .
   Google Scholar
• Bransby , D.I. 1980 . Herbage height as a determinant of the preference of steers grazing three pasture species . Proc. Grassld Soc. sth. Afr. , 15 : 153 – 155 .
   Google Scholar
• Carter , A.J. and O'Connor , T.G. 1991 . A two‐phase mosaic in a savanna grassland . J. Veg. Sci. , 2 : 231 – 236 .
   Web of Science ®Google Scholar
• Carter , A.J. and Robinson , E.R. Genetic structure of a population of the clonal grass . Setaria incrassata. Biol. J. Linn. Soc. , in press
   Google Scholar
• Chacon , E.A. and Stobbs , T.H. 1976 . Influence of progressive defoliation of a grass sward on the eating behaviour of cattle . Aust. J. Agric. Res. , 27 : 709 – 727 .
   Google Scholar
• Chacon , E.A. , Stobbs , T.H. and Dale , M.B. 1978 . Influence of sward characteristics on grazing behaviour and growth of Hereford steers grazing tropical grass pastures . Aust. J. Agric. Res. , 29 : 89 – 102 .
   Google Scholar
• Danckwerts , J.E. , Aucamp , A.J. and Barnard , H.J. 1983 . Herbaceous species preference by cattle in the False Thornveld of the eastern Cape . Proc. Grassld Soc. sth. Afr. , 18 : 89 – 94 .
   Google Scholar
• Ellison , L. 1960 . Influence of grazing on plant succession of rangelands . Bot. Rev. , 26 : 1 – 78 .
   Web of Science ®Google Scholar
• Foran , B.D. , Tainton , N.M. and Booysen , P. de V. 1978 . The development of a method for assessing veld condition in three grassveld types in Natal . Proc. Grassld Soc. sth. Afr. , 13 : 27 – 33 .
   Google Scholar
• Gammon , D.M. and Roberts , B.R. 1978a . Patterns of defoliation during continuous and rotational grazing of the Matopos sandveld of Rhodesia. 1. Selectivity of grazing . Rhod. J. Agric. Res. , 16 : 117 – 131 .
   Google Scholar
• Gammon , D.M. and Roberts , B.R. 1978b . Patterns of defoliation during continuous and rotational grazing of the Matopos sandveld of Rhodesia. 3. Frequency of defoliation . Rhod. J. Agric. Res. , 16 : 147 – 164 .
   Google Scholar
• Gammon , D.M. and Twiddy , D.R. 1990 . Patterns of defoliation in four‐ and eight‐paddock grazing systems . J. Grassld Soc. South. Afr. , 7 : 29 – 35 .
   Google Scholar
• Gibbs Russell , G.E. , Watson , L. , Koekemoer , M. , Smook , L. , Barker , N.P. , Anderson , H.M. and Dallwitz , M.J. 1990 . Grasses of southern Africa . Mem. Bot. Surv. S. Afr. , : 58
   Google Scholar
• Griffioen , C. and O'Connor , T.G. 1990 . The influence of trees and termite mounds on the soils and herbaceous composition of a savanna grassland . S. Afr. J. Ecol. , 1 : 18 – 26 .
   Google Scholar
• Hatch , G.P. and Tainton , N.M. 1990 . A preliminary investigation of area‐selective grazing in the Southern Tall Grassveld of Natal . J. Grassld. Soc. South. Afr. , 7 : 238 – 242 .
   Google Scholar
• Heady , H.F. 1964 . Palatability of herbage and animal preference . J. Range Manage. , 17 : 76 – 82 .
   Google Scholar
• Illius , A.W. and Gordon , I.J. 1987 . The allometry of food intake in grazing ruminants . J. Anim. Ecol. , 56 : 989 – 999 .
   Web of Science ®Google Scholar
• Jager , J.C. and Looman , C.W.N. 1987 . “ Data collection ” . In Data analysis in community and landscape ecology , Edited by: Jongman , R.H.G. , Ter Braak , C.J.F. and Van Tongeren , O.F.R. Wageningen, , Netherlands : Pudoc .
   Google Scholar
• Lightfoot , C. 1975 . Common veld grasses of Rhodesia , Rhodesia : Natural Resources Board .
   Google Scholar
• Ludlow , T.W. , Stobbs , T.H. , Davis , R. and Charles‐Edwards , D.A. 1982 . Effects of sward structure of two tropical grasses with contrasting canopies on light distribution, net photosynthesis and size of bite harvested by grazing cattle . Aust. J. Agric. Res. , 33 : 187 – 201 .
   Google Scholar
• MacVicar , C.N. , Loxton , R.F. , Lambrechts , J.J.N. , Le Roux , J. , De Villiers , J.M. , Verster , E. , Merryweather , F.R. , Van Rooyen , T.H. , Harmse , H.J. and von , M. 1977 . Soil classification: a binomial system for South Africa , Pretoria : Dept. Agric. Tech. Serv. .
   Google Scholar
• McNaughton , S.J. 1984 . Grazing lawns: animals in herds, plant form, and co‐evolution . Am. Nat. , 124 : 863 – 886 .
   Web of Science ®Google Scholar
• Mott , J.J. , Ludlow , M.M. , Richards , J.H. and Parson , A.D. 1992 . Causes of variation in seasonal response to defoliation in three tropical savanna grasses . Aust. J. Agric. Res. , 43 : 241 – 260 .
   Google Scholar
• O'Connor T.G. in prep Compositional and population responses of two African savanna grasslands to rainfall and grazing.
   Google Scholar
• O'Connor , T.G. and Pickett , G.A. 1992 . The influence of grazing on seed production and seed banks of some African savanna grasslands . J. Appl. Ecol. , 29 : 247 – 260 .
   Web of Science ®Google Scholar
• O'Reagain , P.J. 1990 . The relationship between sward structure, ingestive behaviour and dietary quality in cattle grazing a Chloris gayana pasture . J. Grassl. Soc. South. Afr. , 7 : 133 – 138 .
   Google Scholar
• O'Reagain , P.J. and Mentis , M.T. 1989a . The effect of plant structure on the acceptability of different grass species to cattle . J. Grassl. Soc. South. Afr. , 6 : 163 – 170 .
   Google Scholar
• O'Reagain , P.J. and Mentis , M.T. 1989b . Sequence and process of species selection by cattle in relation to optimal foraging theory on an old land in the Natal Sour Sandveld . J. Grassl. Soc. South. Afr. , 6 : 71 – 76 .
   Google Scholar
• Owen‐Smith , N. 1991 . Veld condition and animal performance: application of an optimal foraging model . J. Grassl. Soc. South. Afr. , 8 : 77 – 81 .
   Google Scholar
• Ring , C.B. , Nicholson , R.A. and Launchbaugh , J.L. 1985 . Vegetational traits of patch‐grazed rangeland in west‐central Kansas . J. Range Manage. , 38 : 51 – 55 .
   Google Scholar
• SAS Institute Inc. 1989 . SAS/STAT User's Guide, Version 6, , 4th edn. , Vol. 2 , Cary, North Carolina : SAS Institute Inc. .
   Google Scholar
• Sokal , R.R. and Rohlf , F.J. 1981 . Biometry , New York : W.H. Freeman & Co. .
   Google Scholar
• Stobbs , T.H. 1973a . The effect of plant structure on the intake of tropical pastures. I. Variation in the bite size of grazing cattle . Aust. J. Agric. Res. , 24 : 449 – 479 .
   Google Scholar
• Stobbs , T.H. 1973b . The effect of plant structure on the intake of tropical pastures. II. Differences in sward structure, nutritive value and bite size of cattle grazing Setaria anceps and Chloris gayana at various stages of growth . Aust. J. Agric. Res. , 24 : 821 – 829 .
   Google Scholar
• Stobbs , T.H. 1975 . The effect of plant structure on the intake of tropical pastures. III. Influence of fertilizer nitrogen on the size of bite harvested by Jersey cows grazing Setaria anceps cv. Kazungula swards . Aust. J. Agric. Res. , 26 : 997 – 1007 .
   Google Scholar
• Stoltsz , C.W. and Danckwerts , J.E. 1990 . Grass species selection patterns on rotationally‐grazed Dohne Sourveld during autumn and early winter . J. Grassl. Soc. South. Afr. , 7 : 92 – 96 .
   Google Scholar
• Tainton , N.M. , Bransby , D.I. and Booysen , P. de V. 1976 . Common veld and pasture grasses of Natal , Pietermaritzburg : Shuter and Shooter .
   Google Scholar
• 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 .
   Google Scholar
• Weaver , J.E. and Clements , F.E. 1938 . Plant ecology , New York : McGraw‐Hill .
   Google Scholar
• Westoby , M. 1974 . An analysis of diet selection by large generalist herbivores . Am. Nat. , 108 : 290 – 304 .
   Web of Science ®Google Scholar
• Willms , W. , Bailey , A.W. and McLean , A. 1980 . Effect of burning or clipping Agropyron spicatum in the autumn on the spring foraging behaviour of mule deer and cattle . J. Appl. Ecol. , 17 : 69 – 84 .
   Web of Science ®Google Scholar
• Willms , W. , Dormaar , J.F. and Schaalje , G.B. 1988 . Stability of grazed patches on rough fescue grasslands . J. Range Manage. , 41 : 503 – 508 .
   Google Scholar