Ruminal microbial populations and fermentation characteristics in bison and cattle fed high- and low-quality forage

1989 ◽  
Vol 17 (3) ◽  
pp. 311-316 ◽  
Author(s):  
Gene Towne ◽  
T. G. Nagaraja ◽  
R. C. Cochran
Keyword(s):  
Microbial Populations ◽  
Ruminal Microbial Populations

Postprandial variations in the activity of polysaccharide-degrading enzymes of fluid- and particle-associated ruminal microbial populations

1993 ◽  
Vol 27 (4) ◽  
pp. 223-228 ◽  
Author(s):  
Cécile Martin ◽  
Brigitte Michalet-Doreau ◽  
Gérard Fonty ◽  
Alan Williams
Keyword(s):  
Microbial Populations ◽  
Degrading Enzymes ◽  
Ruminal Microbial Populations

Ruminal Microbial Populations and Fermentation Characteristics in Beef Cattle Grazing Tropical Forage in Dry Season and Supplemented with Different Protein Levels

2019 ◽  
Vol 76 (3) ◽  
pp. 270-278
Author(s):  
Renata Pereira da Silva-Marques ◽  
Joanis Tilemahos Zervoudakis ◽  
Luciano Nakazato ◽  
Luciana Keiko Hatamoto-Zervoudakis ◽  
Luciano da Silva Cabral ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Cattle Grazing ◽  
Dry Season ◽  
Microbial Populations ◽  
Protein Levels ◽  
Tropical Forage ◽  
Ruminal Microbial Populations

scholarly journals Rapid changes in key ruminal microbial populations during the induction of and recovery from diet-induced milk fat depression in dairy cows

2015 ◽  
Vol 114 (3) ◽  
pp. 358-367 ◽  
Author(s):  
D. E. Rico ◽  
S. H. Preston ◽  
J. M. Risser ◽  
K. J. Harvatine
Keyword(s):  
Induction Period ◽  
Milk Fat ◽  
Time Course ◽  
Temporal Dynamics ◽  
Recovery Period ◽  
Microbial Populations ◽  
Milk Fat Depression ◽  
Butyrivibrio Fibrisolvens ◽  
Ciliate Protozoa ◽  
Ruminal Microbial Populations

The ruminant provides a powerful model for understanding the temporal dynamics of gastrointestinal microbial communities. Diet-induced milk fat depression (MFD) in the dairy cow is caused by rumen-derived bioactive fatty acids, and is commonly attributed to the changes in the microbial population. The aim of the present study was to determine the changes occurring in nine ruminal bacterial taxa with well-characterised functions, and abundance of total fungi, ciliate protozoa and bacteria during the induction of and recovery from MFD. Interactions between treatment and time were observed for ten of the twelve populations. The total number of both fungi and ciliate protozoa decreased rapidly (days 4 and 8, respectively) by more than 90 % during the induction period and increased during the recovery period. The abundance ofStreptococcus bovis(amylolytic) peaked at 350 % of control levels on day 4 of induction and rapidly decreased during the recovery period. The abundance ofPrevotella bryantii(amylolytic) decreased by 66 % from day 8 to 20 of the induction period and increased to the control levels on day 12 of the recovery period. The abundance ofMegasphaera elsdeniiandSelenomonas ruminantium(lactate-utilising bacteria) increased progressively until day 12 of induction (>170 %) and decreased during the recovery period. The abundance ofFibrobacter succinogenes(fibrolytic) decreased by 97 % on day 4 of induction and increased progressively to an equal extent during the recovery period, although smaller changes were observed for other fibrolytic bacteria. The abundance of theButyrivibrio fibrisolvens/Pseudobutyrivibriogroup decreased progressively during the induction period and increased during the recovery period, whereas the abundance ofButyrivibrio hungateiwas not affected by treatment. Responsive taxa were modified rapidly, with the majority of changes occurring within 8 d and their time course was similar to the time course of the induction of MFD, demonstrating a strong correlation between changes in ruminal microbial populations and MFD.

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