Summary
The quantitative plant species composition of the rumen contents of a large number of individuals from eight East African herbivores was determined by direct visual analysis. All plant species were classified as either C3 or C4, and an estimated δ13C for the rumen sample was calculated. This estimated value was compared to a measured value determined directly from rumen subsample. The two methods of determining quantitative C3 and C4 composition differed by less than 1%, and the isotopic analysis has the advantage of being rapid and totally objective.
The isotopic analysis allowed us to differentiate between grazers and browsers and to determine the quantitative dependence of each animal on C3 and C4 photosynthetic types. Kongoni, wildebeest, cattle, and sheep were nearly pure grazers on the Athi Kapiti Plains; and the Grant's gazelle were predominantly browsers. Thompson's gazelle, goast and impala were intermediate. The species most dependent upon browse showed a marked and rapid shift to grass within a few days following rain. This isotopic method may have general utility in the study of East African ecology.
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References
Akin, D.E., Burdick, D.: Rumen microbial degradation of starch-containing bundle sheath cells in warm-season grasses. Crop Sci. 17, 529–533 (1977)
Black, C.C.: Photosynthetic carbon fixation in relation to net CO2 uptake. Ann. Rev. Pl. Physiol. 24, 253–286 (1973)
Chamrad, A.D., Box, T.W.: A point frame for sampling rumen contents. J. Wildl. Mgmt. 28, 473–477 (1964)
DeNiro, M.J., Epstein, S.: Mechanism of carbon isotope fractionation associated with lipid synthesis. Science 197, 261–263 (1977)
Hattersley, P.W., Watson, L.: Anatomical parameters for predicting photosynthetic pathways of grass leaves: the maximum lateral cell count' and the maximum cells distant count'. Phytomorphology 25, 325–333 (1975)
Hoppe, P.P., Qvortrup, S.A., Woodford, M.H.: Rumen fermentation and food selection in East African Zebu cattle, wildebeest, Coke's hartebeest and topi. J. Zool. (Lond.) 181, 1–9 (1977)
Jarman, P.J.: The social organization of antelope in relation to their ecology. Behavior 48, 215–267 (1974)
Kerlinger, F.N., Pedhozur, E.J.: Multiple regression in behavioral research. New York: Holt, Rinehart and Winston 1973
Laetsch, W.M.: The C4 syndrome: a structural analysis. Ann. Rev. Pl. Physiol. 25, 27–52 (1974)
Ludlow, M.M., Troughton, J.H., Jones, R.J.: A technique for determining the proportion of C3 and C4 species in plant samples using stable natural isotopes of carbon. J. Agric. Sci. (Camb.) 87, 625–632 (1976)
Mooney, H.A., Troughton, J.H., Berry, J.A.: Carbon isotope ratio measurements of succulent plants in Southern Africa. Oecologia (Berl.) 30, 295–305 (1977)
Morris, M.J.: The use of rating or ranking in vegetation measurements in range research methods. U.S. Dept. of Agriculture, Forest Service, Misc. Publ. 940, 172 pp. (1962)
Mulroy, T.W., Rundel, W.: Annual plants: adaptations to desert environments. Bioscience 27, 109–114 (1977)
Nge'the, J.C., Box, T.W.: Botanical composition of eland and goat diets on an Acacia-grassland community in Kenya. J. Range Mgmt. 29, 290–293 (1976)
Pace, C.P.: Establishment report. Range study plots, Kajiado District. Typescript, 12 pp., Kenya Wildlife Management Project (1974)
Qvortrup, S.A.: Dry season feeding of wildlife and livestock on the Athi Kapiti Plain of Kajiado District. Kenya Wildlife Management Project, Collection No. 1 (1974)
Qvortrup, S.A.: Wildlife and livestock feeding on the Athi Kapiti Plains of Kajiado District. Kenya Wildlife Management Project, Collection No. 3 (1975)
Smith, B.N.: Evaluation of C4 photosynthesis. In: The fractionation of stable carbon isotopes by plants (C.R. Benedict, ed.), pp. 5–21. Symposium of the Southern Section of ASPP. College Station: Texas A&M Univ. Press 1976
Smith, B.N., Brown, W.V.: The Kranz syndrome in the Gramineae as indicated by carbon isotopic ratios. Am. J. Bot. 60, 505–513 (1973)
Smith, B.N., Epstein, S.: Biogeochemistry of the stable isotopes of hydrogen and carbon in salt marsh biota. Plant Physiol. 46, 738–742 (1970)
Smith, B.N., Oliver, J., McMillan, C.: Influence of carbon source, oxygen concentration, light intensity, and temperature on 13C/12C ratios in plant tissues. Bot. Gaz. 137, 99–104 (1976)
Smith, B.N., Turner, B.L.: Distribution of Kranz syndrome among Asteraceae. Am. J. Bot. 62, 541–545 (1975)
Stowe, L.G., Teeri, J.A.: The geographic distribution of C4 species of the dicotyledonae in relation to climate. Am. Nat. 112, 1–26 (1978)
Talbot, L.M., Talbot, M.H.: Food preferences of some East African wild ungulates. E. Afr. Agric. For. J. 27, 131–138 (1962)
Teeri, J.A., Stowe, L.G.: Climatic patterns and distribution of C4 grasses in North America. Oecologia (Berl.) 23, 1–12 (1976)
Tieszen, L.L., Senyimba, M.M., Imbamba, S.K., Troughton, J.H.: The distribution of C3 and C4 grasses and carbon isotope discrimination along an altitudinal and moisture gradient in Kenya. Oecologia (Berl.) 37, 337–350 (1979)
Troughton, J.H., Card, K.A.: Temperature effects on the carbon-isotope ratio of C3, C4 and Crassulacean-acid-metabolism (CAM) plants. Planta (Berl.) 123, 185–190 (1975)
Troughton, J.H., Wells, P.V., Mooney, H.A.: Photosynthetic mechanisms and paleoecology from carbon isotope ratios in ancient specimens of C4 and CAM plants. Science 185, 610–612 (1974)
Ward, J.H., Jr.: Multiple linear regression models. In: Computer applications in the behavioral sciences (H. Borko, ed.). Englewood Cliffs, New Jersey: Prentice-Hall 1962
Wilson, D.E., Hirst, S.M., Ellis, R.P.: Determination of feeding preferences in wild ruminants from trocar samples. J. Wildl. Mgmt. 41, 70–75 (1977)
Winter, K., Troughton, J.H., Card, A.: 359-1 values of grass species collected in the Northern Sahara Desert. Oecologia (Berl.) 25, 115–123 (1976)
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Tieszen, L.L., Hein, D., Qvortrup, S.A. et al. Use of δ13C values to determine vegetation selectivity in East African herbivores. Oecologia 37, 351–359 (1979). https://doi.org/10.1007/BF00347911
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DOI: https://doi.org/10.1007/BF00347911