The seabed plays a key role in the marine carbon cycle as a) the terminal location of aerobic
oxidation of organic matter, b) the greatest anaerobic bioreactor, and c) the greatest …

Benthic O2 availability regulates many important biogeochemical processes and has crucial
implications for the biology and ecology of benthic communities. Further, the benthic O2 …

Continental erosion controls atmospheric carbon dioxide levels on geological timescales
through silicate weathering, riverine transport and subsequent burial of organic carbon in …

1. The first part of this review focuses on the oxygen status of natural groundwater systems
(mainly porous aquifers) and hyporheic zones of streams. The second part examines the …

In this paper, we outline the need for a coordinated international effort toward the building of
an open-access Global Ocean Oxygen Database and ATlas (GO2DAT) complying with the …

In this review of sediment denitrification in estuaries and coastal ecosystems, we examine
current denitrification measurement methodologies and the dominant biogeochemical …

Reconstructions of coupled carbon, oxygen, and sulfur cycles rely heavily on sedimentary
pyrite sulfur isotope compositions (δ34Spyr). With a model of sediment diagenesis, paired …

A nomogram is developed to show that pH, redox potentials (EhNHE) and measures of
dissolved sulfides (H2S+ HS−+ S2−)(total free S2−) can be used to classify organic …

Carbon mineralization of fresh and aged diatoms (Skeletonema costatum) and barley hay
(Hordeum vulgare) was followed for 23 to 35 d in sandy and silty sediment. By the use of a …

Microbial communities can subsist at depth in marine sediments without fresh supply of
organic matter for millions of years. At threshold sedimentation rates of 1 millimeter per 1000 …