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High nutrient availability reduces the diversity and stability of the equine caecal microbiota

BACKGROUND: It is well known that nutrient availability can alter the gut microbiota composition, while the effect on diversity and temporal stability remains largely unknown. METHODS: Here we address the equine caecal microbiota temporal stability, diversity, and functionality in response to diets...

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Detalles Bibliográficos
Autores principales: Hansen, Naja C. K., Avershina, Ekaterina, Mydland, Liv T., Næsset, Jon A., Austbø, Dag, Moen, Birgitte, Måge, Ingrid, Rudi, Knut
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Co-Action Publishing 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4526772/
https://www.ncbi.nlm.nih.gov/pubmed/26246403
http://dx.doi.org/10.3402/mehd.v26.27216
Descripción
Sumario:BACKGROUND: It is well known that nutrient availability can alter the gut microbiota composition, while the effect on diversity and temporal stability remains largely unknown. METHODS: Here we address the equine caecal microbiota temporal stability, diversity, and functionality in response to diets with different levels of nutrient availability. Hay (low and slower nutrient availability) versus a mixture of hay and whole oats (high and more rapid nutrient availability) were used as experimental diets. RESULTS: We found major effects on the microbiota despite that the caecal pH was far from sub-clinical acidosis. We found that the low nutrient availability diet was associated with a higher level of both diversity and temporal stability of the caecal microbiota than the high nutrient availability diet. These observations concur with general ecological theories, suggesting a stabilising effect of biological diversity and that high nutrient availability has a destabilising effect through reduced diversity. CONCLUSION: Nutrient availability does not only change the composition but also the ecology of the caecal microbiota.