Figure 1.
(A) Stacked bar plot showing the phylum-level composition for each individual cow rumen sampled. (B) Ratio of Firmicutes to Bacteroidetes.
Figure 2.
Correlation between milk-fat yield and Firmicutes-to-Bacteroidetes ratio.
Scatter plot showing the amount of fat produced per day for each cow (X-axis), vs. the Firmicutes-to-Bacteroidetes ratio. Each point represents one individual cow. R2 of the linear regression is shown in the upper right corner of the plot.
Figure 3.
Correlation between efficiency parameter and genus abundance.
Pearson linear correlation matrix of the dominant bacterial genera across the rumen samples. The genera were included in the matrix if they were in at least 50% of the cows and represented at least 0.1% of the bacterial community in at least one of the cows. Strong correlations are indicated by large squares, weak correlations by small squares. The scale colors denote whether the correlation is positive (closer to 1, blue squares) or negative (closer to −1, red squares) between the genera and the efficiency parameters. Color coding represents the phylum to which each genus belongs, as follows: Actinobacteria (green), Bacteroidetes (blue), Firmicutes (red), Proteobacteria (orange), Spirochaetes (purple), Tenericutes (light blue), TM7 (olive), Cyanobacteria (black).
Figure 4.
Abundance of genera within the phylum Firmicutes compared to the genus Prevotella.
Stack bar showing the abundance of genera belonging to the phylum Firmicutes that were negatively correlated with Prevotella abundance. These included all genera that were in at least half of the cows sampled and constituted 0.1% of the reads in at least one cow. The gray portion of the bars represents the abundance of Prevotella (phylum Bacteroidetes). The dashed line separates samples with more than 50% Prevotella (left side) and from those with less than 50% Prevotella.