Fig. 4
Alpha diversity metrics between microbiomes from wild, captive khulans and wild, domestic horses. (A) Captive khulan microbiomes are significantly less diverse than those from wild populations of khulans and wild and domestic horses from Mongolia7. (B) Venn diagram showing the overlap in OTUs among wild khulans, wild horses, captive khulans, and domestic horses. Wild khulans and wild horses show the highest number of unique OTUs compared to either captive khulans or domestic horses. Wild khulans have 1,651 unique OTUs and wild horses have 2,236, while both domestic horses and captive khulans have fewer than 700 unique OTUs each. A significant overlap of 335 OTUs might indicate a core set of bacteria shared among Mongolian equids.
