Polysaccharides are major components of macroalgal and phytoplankton biomass and
constitute a large fraction of the organic matter produced and degraded in the ocean. Until …

Fjord ecosystems of the high Arctic are distinct from fjords of temperate latitudes due to the
influence of glaciers, icebergs, sea ice, and the permanently low temperatures. The …

An initial modeling approach was applied to analyze how a single, nonmotile, free-living,
heterotrophic bacterial cell may optimize the deployment of its extracellular enzymes. Free …

Microbes are the engines driving biogeochemical cycles. Microbial extracellular enzymatic
activities (EEAs) are the “gatekeepers” of the carbon cycle. The total EEA is the sum of cell …

The identities and biochemical properties of extracellular enzymes present in natural
environments are poorly constrained. We used a series of competitive inhibition experiments …

Bottom nepheloid layers (BNLs) in the deep sea transport and remobilize considerable
amounts of particulate matter, enhancing microbial cycling of organic matter in cold, deep …

Heterotrophic microbial communities play a central role in the marine carbon cycle. They are
active in nearly all known environments, from the surface to the deep ocean, in the …

Carbohydrates represent an important fraction of labile and semi-labile marine organic
matter that is mainly comprised of exopolymeric substances derived from phytoplankton …

Extracellular enzymes are functional components of marine microbial communities that
contribute to nutrient remineralization by catalyzing the degradation of organic substrates …

It is generally recognised that enzymatic activities are controlled by their end-product
concentration, so that when the end-product concentration is high the enzyme activity is low …