Nitrogen (N) is a key element for life in the oceans. It controls primary productivity in many
parts of the global ocean, consequently playing a crucial role in the uptake of atmospheric …

Nitrogen (N) is one of the primary nutrients required to build biomass and is therefore in high
demand in aquatic ecosystems. Estuaries, however, are frequently inundated with high …

Microorganisms oxidize organic nitrogen to nitrate in a series of steps. Nitrite, an
intermediate product, accumulates at the base of the sunlit layer in the subtropical ocean …

Archaea are ubiquitous and abundant members of the marine plankton. Once thought of as
rare organisms found in exotic extremes of temperature, pressure, or salinity, archaea are …

Rapid advances in molecular microbial ecology have yielded an unprecedented amount of
data about the evolutionary relationships and functional traits of microbial communities that …

Archaeal membrane lipids known as glycerol dibiphytanyl glycerol tetraethers (GDGTs) are
the basis of the TEX86 paleotemperature proxy. Because GDGTs preserved in marine …

Diversity, abundance, and activity of ammonia-oxidizing bacteria (AOB) and ammonia-
oxidizing archaea (AOA) were investigated using the ammonia monooxygenase α subunit …

Archaeal ammonia oxidizers (AOAs) are increasingly recognized as prominent members of
natural microbial assemblages. Evidence that links the presence of AOA with in situ …

Taihu Lake is hypereutrophic and experiences seasonal, cyanobacterial harmful algal
blooms. These Microcystis blooms produce microcystin, a potent liver toxin, and are linked to …

The marine nitrogen cycle is a complex web of microbially mediated reactions that control
the inventory, distribution, and speciation of nitrogen in the marine environment. Because …