Rumen bacterial composition in lambs is affected by β-adrenergic agonist supplementation and heat stress at the phylum level1

Duffy, Erin M; Tietze, Shauna M; Knoell, Allison; Aluthge, Nirosh D.; Fernando, Samodha C.; Schmidt, T; Yates, Dustin T; Petersen, Jessica L.

doi:10.1093/tas/txy052

Cited by 6 publications

(8 citation statements)

References 18 publications

(19 reference statements)

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“…The observed change in total VFA is contrary to Walker and Drouillard (2010) in which RH added directly to buffered ruminal fluid had no impact on VFA levels, showing that RH does not affect microbial growth or fermentation end products when grown in pure cultures. RH supplementation did not change bacterial composition in these sheep ( Duffy et al, 2018 ); however, RH and the interaction of RH with environment impacted production of VFAs. This implicates another mechanism, besides the change in the bacterial community itself in altered VFA production.…”

Section: Discussionmentioning

confidence: 85%

“…In addition, temperature and humidity have a notable effect on the rumen microbial composition which may lead to changes in VFA production ( Tajima et al, 2007 ). A significantly different microbial composition was present in these lambs comparing HS to TN conditions ( Duffy et al, 2018 ), therefore we expected to see a clear difference in VFA as well. However, these results suggest that the response due to the interaction between environment and supplementation is more complex.…”

Section: Discussionmentioning

confidence: 95%

“…With the profound role of VFA production in energy status of the ruminant, and given that heat stress (HS) events can affect ruminal microbial populations ( Tajima et al, 2007 ; Duffy et al, 2018 ) HS thereby may alter energy substrate available to the animal. Significant reductions in VFA levels have been reported during increased environmental temperature in both ad libitum and limit-fed animals ( Weldy et al, 1964 ; Kelley et al, 1967 ; Freestone and Lyte, 2010 ).…”

Section: Introductionmentioning

confidence: 99%

“…The objective of this study was to determine the impact of β1 agonists, β2 agonists, and HS on rumen VFA production using lambs as a model for cattle. Our prior work showed that heat stress, but not β-AA alone, changed the overall composition of the ruminant microbiome ( Duffy et al, 2018 ). These changes in the microbiome are postulated to change VFA production.…”

Section: Introductionmentioning

confidence: 99%

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Effect of environmental temperature and β-adrenergic agonist supplementation on rumen volatile fatty acid production in sheep

Duffy

Wilson

Schmidt

et al. 2019

Translational Animal Science

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Section: Discussionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of environmental temperature and β-adrenergic agonist supplementation on rumen volatile fatty acid production in sheep

Duffy

Wilson

Schmidt

et al. 2019

Translational Animal Science

Self Cite

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“…Given that both stress (e.g. Duffy et al 2018) and different levels of dietary fibre (e.g. Petri et al 2013;Henderson et al 2015) affect the gut microbial-community diversity and its products, we predicted that the diversity of the bacterial community in the forestomach contents of collared peccary would be linked with both the individuals' coping style and dietary fibre level.…”

Section: Introductionmentioning

confidence: 99%

Individual differences in behaviour and gut bacteria are associated in collared peccary (Mammalia, Tayassuidae)

et al. 2021

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Aims: We tested the hypothesis that the behaviour of an individual is associated with the diversity of its gut bacteria, using the collared peccary () as a model. Pecari tajacu Methods and Results: In all, 24 adult male collared peccaries received either low-( 12) or high-fibre diet ( 12) to induce contrasting gut n = n = fermentation profiles. They were submitted to three short-term challenges, allowing us to rate the animals in a coping-style dimension named 'calmness'. At the end of the experimental period, we collected samples of peccaries' forestomach contents to characterize bacterial diversity. We found a significant positive association between individual 'calmness' z-scores and the bacterial evenness index in gut bacteria (and a similar trend with the Simpson's diversity index), suggesting a more homogeneous bacterial community of calmer individuals. We also found a positive association between fibres digestibility and gut bacterial diversity in the peccaries' forestomach, but no effect of the dietary fibre level. Conclusions: Gut bacteria evenness increases with 'calmness' z-scores, suggesting a more homogeneous bacterial community of calmer individuals, compared with the more heterogeneous of the most distressed ones. Our results also suggest associations between the digestibility of ADF with the gut bacterial diversity indices and with the relative abundance of the Actinobacteria phylum. Significance and Impact of the Study: Our data showed that the hosts' individual behavioural differences are potentially aligned with gut bacterial diversity. The behaviour-microbiota link is correlated with host feed efficiency and, ultimately, may have implications for animal health and welfare of farm animals.

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Effect of Heat Stress on Rumen Microbial Diversity and Fermentation Pattern in Buffalo

Yadav

Kumar

et al. 2022

Advanced Gut & Microbiome Research

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In this study, changes in rumen microbiome and fermentation were examined during heat stress (HS) in buffaloes. Six buffalo heifers were exposed to thermoneutral ( THI = 72 ) and HS ( THI = 87 – 90 ) conditions for 6 h between 10 AM and 4 PM for 21 days in the climatic chamber. A digestibility trial with four-day collection period was conducted at the end of the study, and rumen liquor was collected on day 21. At the phylum level, an increased ( p < 0.05 ) abundance of Firmicutes and a decreased ( p < 0.05 ) abundance of Proteobacteria and Planctomycetes were observed during HS compared to thermoneutral conditions. The abundance of 6 different genera of phylum Firmicutes, YRC22 (phylum Bacteroidetes), and Stenotrophomonas (phylum Proteobacteria) was increased ( p < 0.05 ), whereas B. firmus, Lysinibacillus, Bacteroides unclassified genus (family Enterobacteriaceae), and Methanobrevibacter decreased ( p < 0.05 ) during HS compared to control. Eight new genera from four different phyla were detected after HS exposure, whereas one genus was not detected in the rumen after HS exposure, which was present during thermoneutral conditions. Dry matter intake, volatile fatty acid concentration, and digestibility did not change ( p > 0.05 ) during HS. It can be concluded that the resilience of the rumen microbial population invokes adaptive responses by changing their abundance to minimize the adverse effects on fermentation and digestibility in buffalo heifers.

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Rumen bacterial composition in lambs is affected by β-adrenergic agonist supplementation and heat stress at the phylum level1

Cited by 6 publications

References 18 publications

Effect of environmental temperature and β-adrenergic agonist supplementation on rumen volatile fatty acid production in sheep

Effect of environmental temperature and β-adrenergic agonist supplementation on rumen volatile fatty acid production in sheep

Individual differences in behaviour and gut bacteria are associated in collared peccary (Mammalia, Tayassuidae)

Effect of Heat Stress on Rumen Microbial Diversity and Fermentation Pattern in Buffalo

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