With Dr. Jessica Labonté, Texas A&M Galveston on “You are what you eat: a geochemical and microbial study of a 3000-year old stratigraphic sediment succession.” Abstract: Microbes make up the majority of the biomass in sediment, where they play a role in cycling organic carbon and regulate the fluctuation of organic matter. In anoxic sediment, the relationships between geochemical gradients, genomic potential, and virus-host interactions remain understudied and poorly understood. I will present the results of our study of stratified sediments from anoxic sinkhole (Blackwood Sinkhole, Bahamas), where we analyzed the pore water chemistry analysis (nutrients, carbon, nitrogen), microbial community composition (16S rRNA gebe and metagenomics), and virus-host interactions. Through the characterization of the relationships of microbes between each other and with their environment, we aim to identify the role organic and inorganic matter availability plays in shaping viral and prokaryotic communities, as well as how microbial communities shape their environment. Missed the last seminar with Taylor Royalty on “Quantitatively partitioning microbial genomic traits among taxonomic ranks: implications for subsurface microbial communities?” Watch it on YouTube.