Publications by authors named "C Warinner"
Streptococcus abundance and oral site tropism in humans and non-human primates reflects host and lifestyle differences.
NPJ Biofilms Microbiomes
January 2025
The genus Streptococcus is highly diverse and a core member of the primate oral microbiome. Streptococcus species are grouped into at least eight phylogenetically-supported clades, five of which are found almost exclusively in the oral cavity. We explored the dominant Streptococcus phylogenetic clades in samples from multiple oral sites and from ancient and modern-day humans and non-human primates and found that clade dominance is conserved across human oral sites, with most Streptococcus reads assigned to species falling in the Sanguinis or Mitis clades.
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- The study investigates ancient microbiomes in archaeological dental calculus from 102 individuals across 10 Pacific islands and one island in Southeast Asia over ~3000 years, revealing insights into human migration patterns.
- DNA from oral microbiomes in dental calculus is better preserved than human DNA from bones, allowing for a clearer analysis of historical microbial communities.
- The oral microbial communities from the Pacific and Island Southeast Asia are distinct from those in Europe, Africa, and Asia, indicating that geographic factors influence the composition of these ancient microbiomes.
The Caucasus and surrounding areas, with their rich metal resources, became a crucible of the Bronze Age and the birthplace of the earliest steppe pastoralist societies. Yet, despite this region having a large influence on the subsequent development of Europe and Asia, questions remain regarding its hunter-gatherer past and its formation of expansionist mobile steppe societies. Here we present new genome-wide data for 131 individuals from 38 archaeological sites spanning 6,000 years.
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- The horse family (equids) has a rich fossil record showing significant evolutionary changes over the last 55 million years, with a wealth of ancient genomes sequenced to understand their domestication history.
- This study generated genome-wide data from 25 ancient equid specimens spanning 44,000 years in regions like Anatolia and Mongolia, revealing the presence of extinct species and new insights into their survival.
- The research also identified genetic differences among Asian wild asses and a common genetic signature in wild asses across continents, raising questions about the role of specific genetic changes in the extinction of certain equid species.