Insight into the Role of Iron(III)-Reducing Microflora in the Arsenic Biogeochemistry of Earthworm ( Pheretima guillemi ) Guts

were potential DMAs(V)-demethylating taxa. Overall, arsenic-transforming microbes comprised up to 100% of gut iron(III)-reducing microbial communities during incubation. Therefore, this research deepens our insights into the role of gut microbiota in soil-dwelling animals in iron-arsenic biogeochemical cycles.