Though archaea are ubiquitous in the oceans, at times present in quantities equal to bacteria, in general, archaea are underreported when compared with bacteria, and little is known about archaeal connectivity in the ocean. Here, we present the first time series data of size‐fractionated archaea with temporal resolution of days across a depth transect in the oligotrophic Atlantic Ocean. Archaeal communities were variable from...

Our understanding of phosphorus (P) dynamics in the deep subseafloor environment remains limited. Here we investigate potential microbial P uptake mechanisms in oligotrophic marine sediments beneath the North Atlantic Gyre and their effects on the relative distribution of organic P compounds as a function of burial depth and changing redox conditions. We use metagenomic analyses to determine the presence of microbial functiona...

Summary Thaumarchaea , which represent as much as 20% of prokaryotic biomass in the open ocean, have been linked to environmentally relevant biogeochemical processes, such as ammonia oxidation (nitrification) and inorganic carbon fixation. We have used culture‐independent methods to study this group because current cultivation limitations have proved a hindrance in studying these organisms. From a metagenomic data set obtained...