Bacterial community structure in the rumen of grazing cattle, sheep and goats | Estructura de las comunidades bacterianas del rumen de vacas, ovejas y cabras en pastoreo
2011
Belenguer, A., Consejo Superior de Investigaciones Científicas, León (España). Inst. de Ganadería de Montaña | Osoro, K., Servicio Regional de Investigación y Desarrollo Agroalimentario, Villaviciosa (España). Área de Sistemas de Producción Animal | Hervás, G., Consejo Superior de Investigaciones Científicas, León (España). Inst. de Ganadería de Montaña | Toral, P.G., Consejo Superior de Investigaciones Científicas, León (España). Inst. de Ganadería de Montaña | Celaya, R., Servicio Regional de Investigación y Desarrollo Agroalimentario, Villaviciosa (España). Área de Sistemas de Producción Animal | García, U., Servicio Regional de Investigación y Desarrollo Agroalimentario, Villaviciosa (España). Área de Sistemas de Producción Animal | Frutos, P., Consejo Superior de Investigaciones Científicas, León (España). Inst. de Ganadería de Montaña
The rumen bacterial community structure was studied in cattle, sheep and goats that were managed in mixed grazing on a big plot with about 76% of short heather- gorse shrubland and 24% of improved pasture. After a grazing period of approximately 2.5 months, rumen samples were obtained via a stomach tube, and DNA was extracted and analyzed by terminal restriction fragment length polymorphism (T-RFLP). Bacterial profiles differed clearly among the three species, with a greater similarity percentage between cattle and sheep. This agrees with the known strong relationship between diet and bacterial composition, and with previous studies on the same plot showing that these two species consume more herbaceous plants and less shrubs than goats. Furthermore, goats' rumen bacterial community presented a lower diversity and significant differences in the relative frequencies of some fragments, such as a greater proportion of one that may match Bacteroidetes species potentially resistant to tannins. On the other hand, a peak compatible with bacteria of the genus Butyrivibrio, which include microorganisms that are very active in degrading hemicellulose, only appeared in sheep and cattle.
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