Figure 1

Diversity of gut bacterial communities in yellow baboons and Udzungwa red colobus in two forest types. (a) Comparison of bacterial richness measured by Chao1 estimator and (b,c) bacterial composition measured by Bray–Curtis dissimilarities for helminth negative and positive faecal samples. Panels from left to right focus on three helminth taxa: strongylid nematodes, Strongyloides, and Trichuris present in yellow baboons, Papio cynocephalus [upper panel in (a); (b)], and Udzungwa red colobus monkeys, Procolobus gordonorum [bottom panel in (a); (c)], living in the forest fragment of Magombera [FF: green in (a), circle in (b) and (c)] or the protected forest of Mwanihana [PF: purple in (a); triangle in (b) and (c)] in the Udzungwa Mountains of Tanzania. In (a), the horizontal line in the boxplot indicates the median, the box extends to the 25th–75th percentile and the whiskers extends to the largest value no further than 1.5 * IQR from the hinges. In (b) and (c) colours represent helminth negative (green) and positive (orange) samples.