Special Issue "Rumen Microbiome-"

A special issue of Animals (ISSN 2076-2615).

Deadline for manuscript submissions: closed (30 August 2021).

Special Issue Editor

Dr. Nagaraju Indugu
E-Mail Website
Guest Editor
Department of Clinical Studies, School of Veterinary Medicine, New Bolton Center, University of Pennsylvania, Kennett Square, PA, USA
Interests: rumen bacterial community; metagenomic assessment; bioinformatics

Special Issue Information

Ruminants are dependent on the microbiota (bacteria, protozoa, archaea, and fungi) that inhabit the reticulorumen for the digestion of feedstuffs. Nearly 70% of energy and 50% of protein requirements for dairy cows are met by microbial fermentation in the rumen, emphasizing the need to characterize the role of microbes in feed breakdown and nutrient utilization. Therefore, knowledge of the microbial composition of the entire gut can provide insights into improving the overall health and productivity of the animal.

We invite original research papers involving rumen microbial communities, their function, composition, and health implications as well as any factors influencing these communities. Additional topics include methane emissions from ruminants, antimicrobial resistance, and microbiome.

Dr. Nagaraju Indugu
Guest Editor

Manuscript Submission Information

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Keywords

  • Ruminant microbiology 
  • Application of molecular techniques to ruminant nutrition 
  • 16S rRNA, metagenomics, and metatranscriptomics 
  • Next-generation throughput sequencing 
  • Microbial diversity in rumen in response to diet and dietary shifts 
  • Identification of food-borne pathogens in the gut of various animals 
  • Methane mitigation strategies

Published Papers (1 paper)

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Research

Article
Seasonal Influence on Rumen Microbiota, Rumen Fermentation, and Enteric Methane Emissions of Holstein and Jersey Steers under the Same Total Mixed Ration
Animals 2021, 11(4), 1184; https://doi.org/10.3390/ani11041184 - 20 Apr 2021
Viewed by 779
Abstract
Seasonal effects on rumen microbiome and enteric methane (CH4) emissions are poorly documented. In this study, 6 Holstein and 6 Jersey steers were fed the same total mixed ration diet during winter, spring, and summer seasons under a 2 × 3 [...] Read more.
Seasonal effects on rumen microbiome and enteric methane (CH4) emissions are poorly documented. In this study, 6 Holstein and 6 Jersey steers were fed the same total mixed ration diet during winter, spring, and summer seasons under a 2 × 3 factorial arrangement for 30 days per season. The dry matter intake (DMI), rumen fermentation characteristics, enteric CH4 emissions and rumen microbiota were analyzed. Holstein had higher total DMI than Jersey steers regardless of season. However, Holstein steers had the lowest metabolic DMI during summer, while Jersey steers had the lowest total DMI during winter. Jersey steers had higher CH4 yields and intensities than Holstein steers regardless of season. The pH was decreased, while ammonia nitrogen concentration was increased in summer regardless of breed. Total volatile fatty acids concentration and propionate proportions were the highest in winter, while acetate and butyrate proportion were the highest in spring and in summer, respectively, regardless of breed. Moreover, Holstein steers produced a higher proportion of propionate, while Jersey steers produced a higher proportion of butyrate regardless of season. Metataxonomic analysis of rumen microbiota showed that operational taxonomic units and Chao 1 estimates were lower and highly unstable during summer, while winter had the lowest Shannon diversity. Beta diversity analysis suggested that the overall rumen microbiota was shifted according to seasonal changes in both breeds. In winter, the rumen microbiota was dominated by Carnobacterium jeotgali and Ruminococcus bromii, while in summer, Paludibacter propionicigenes was predominant. In Jersey steers, Capnocytophaga cynodegmi, Barnesiella viscericola and Flintibacter butyricus were predominant, whereas in Holstein steers, Succinivibrio dextrinosolvens and Gilliamella bombicola were predominant. Overall results suggest that seasonal changes alter rumen microbiota and fermentation characteristics of both breeds; however, CH4 emissions from steers were significantly influenced by breeds, not by seasons. Full article
(This article belongs to the Special Issue Rumen Microbiome-)
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