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Development of, and natural fluctuations in, rumen microbial populations

  • Chapter
The Rumen Microbial Ecosystem

Abstract

Establishment of microbes in the young ruminant is primarily dependent upon its exposure to an adult animal and having a rumen environment compatible with growth of the microorganisms. The major portion of the rumen microbial population consists of strictly anaerobic bacteria and ciliate protozoa, which appear to account for most of the fermentative activity in this organ. Anaerobic fungi have recently been found also to be normal inhabitants of the rumen; however, they occur in lower concentrations and their ecological niche in the rumen fermentation is uncertain (Chapter 4). Microbial numbers and the composition of the population are affected by a number of factors, of which diet is probably one of the most important. Smaller numbers of facultatively anaerobic bacteria (which may be of importance in very young ruminants), aerobic bacteria, flagellate protozoa and mycoplasmas are also present; however, their contribution to the overall fermentation is considered minimal.

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Authors and Affiliations

  1. Department of Animal Sciences, Ohio State University, Wooster, Ohio, USA

    B. A. Dehority

  2. Orpin Bioconsultants Ltd, Duxford, Cambridge, UK

    C. G. Orpin

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  1. B. A. Dehority
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  1. Department of Molecular and Cell Biology, University of Aberdeen, UK

    P. N. Hobson

  2. The Nutrition Division, The Rowett Research Institute, Aberdeen, UK

    C. S. Stewart

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Dehority, B.A., Orpin, C.G. (1997). Development of, and natural fluctuations in, rumen microbial populations. In: Hobson, P.N., Stewart, C.S. (eds) The Rumen Microbial Ecosystem. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1453-7_5

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  • DOI: https://doi.org/10.1007/978-94-009-1453-7_5

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