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

Hansen NC, Avershina E, Mydland LT, Næsset JA, Austbø D, Moen B, Måge I, Rudi K - Microb. Ecol. Health Dis. (2015)

Bottom Line: It is well known that nutrient availability can alter the gut microbiota composition, while the effect on diversity and temporal stability remains largely unknown.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.Nutrient availability does not only change the composition but also the ecology of the caecal microbiota.

View Article: PubMed Central - PubMed

Affiliation: Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, Aas, Norway.

ABSTRACT

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.

No MeSH data available.


Related in: MedlinePlus

Caecal VFA and NH3-N. Mean difference between the two diets. The barplot is illustrating the mean difference between the two diets in NH3N, VFA, acetate, propionate, and butyrate. Mean difference values above the zero line imply a higher mean value in the hay-fed horses than in whole oats–fed horses, whereas mean difference values under the zero line imply a lower mean value in the hay-fed horses than in whole oats–fed horses. Error bars represent standard deviations.
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Figure 0001: Caecal VFA and NH3-N. Mean difference between the two diets. The barplot is illustrating the mean difference between the two diets in NH3N, VFA, acetate, propionate, and butyrate. Mean difference values above the zero line imply a higher mean value in the hay-fed horses than in whole oats–fed horses, whereas mean difference values under the zero line imply a lower mean value in the hay-fed horses than in whole oats–fed horses. Error bars represent standard deviations.

Mentions: On average when horses were fed the oat diet, the caecal NH3N level was lower, the VFA level was higher, the acetate level was lower, and the propionate level was higher than in horses fed the hay diet (Fig. 1).


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

Hansen NC, Avershina E, Mydland LT, Næsset JA, Austbø D, Moen B, Måge I, Rudi K - Microb. Ecol. Health Dis. (2015)

Caecal VFA and NH3-N. Mean difference between the two diets. The barplot is illustrating the mean difference between the two diets in NH3N, VFA, acetate, propionate, and butyrate. Mean difference values above the zero line imply a higher mean value in the hay-fed horses than in whole oats–fed horses, whereas mean difference values under the zero line imply a lower mean value in the hay-fed horses than in whole oats–fed horses. Error bars represent standard deviations.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4526772&req=5

Figure 0001: Caecal VFA and NH3-N. Mean difference between the two diets. The barplot is illustrating the mean difference between the two diets in NH3N, VFA, acetate, propionate, and butyrate. Mean difference values above the zero line imply a higher mean value in the hay-fed horses than in whole oats–fed horses, whereas mean difference values under the zero line imply a lower mean value in the hay-fed horses than in whole oats–fed horses. Error bars represent standard deviations.
Mentions: On average when horses were fed the oat diet, the caecal NH3N level was lower, the VFA level was higher, the acetate level was lower, and the propionate level was higher than in horses fed the hay diet (Fig. 1).

Bottom Line: It is well known that nutrient availability can alter the gut microbiota composition, while the effect on diversity and temporal stability remains largely unknown.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.Nutrient availability does not only change the composition but also the ecology of the caecal microbiota.

View Article: PubMed Central - PubMed

Affiliation: Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, Aas, Norway.

ABSTRACT

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.

No MeSH data available.


Related in: MedlinePlus