Microbial dissimilatory sulfate reduction to sulfide is a predominant terminal pathway of
organic matter mineralization in the anoxic seabed. Chemical or microbial oxidation of the …

A great number of the bacteria and archaea on Earth are found in subsurface environments
in a physiological state that is poorly represented or explained by laboratory cultures …

The ability of microorganisms to withstand long periods with extremely low energy input has
gained increasing scientific attention in recent years. Starvation experiments in the …

Microorganisms in marine subsurface sediments substantially contribute to global biomass.
Sediments warmer than 40° C account for roughly half the marine sediment volume, but the …

The depth of oxygen penetration into marine sediments differs considerably from one region
to another,. In areas with high rates of microbial respiration, O2 penetrates only millimetres …

Reactive iron (FeR) serves as an important sink of organic carbon (OC) in marine surface
sediments, which preserves approximately 20% of total OC (TOC) as reactive iron-bound …

Our knowledge of physical, chemical, geological and biological processes affecting
methane in the ocean and in underlying sediments is expanding at a rapid pace. On first …

Subseafloor microbial activities are central to Earth's biogeochemical cycles. They control
Earth's surface oxidation and major aspects of ocean chemistry. They affect climate on long …

Deposition of ferruginous sediment was widespread during the Archaean and Proterozoic
Eons, playing an important role in global biogeochemical cycling. Knowledge of organic …

Under anoxic conditions in sediments, acetogens are often thought to be outcompeted by
microorganisms performing energetically more favorable metabolic pathways, such as …