In marine sediments, DNA occurs both inside and outside living organisms. DNA not
enclosed in living cells may account for the largest fraction of total DNA, and include …

▪ Abstract Heterotrophic bacteria perform two major functions in the transformation of organic
matter: They produce new bacterial biomass (bacterial secondary production [BP]), and they …

Cyanobacteria of the genus Oscillatoria (Trichodesmium) account for annual inputs of
nitrogen to the world's oceans of about 4.8× 1012 grams while benthic environments …

In both marine and freshwaters, the concentration of dissolved organic nitrogen (DON)
frequently exceeds that of dissolved inorganic nitrogen (DIN), including ammonium, nitrate …

Relative to inorganic nitrogen, concentrations of dissolved organic nitrogen (DON) are often
high, even in regions believed to be nitrogen-limited. The persistence of these high …

It is now well known that heterotrophic bacteria account for a large portion of total uptake of
both phosphate (60% median) and ammonium (30% median) in freshwaters and marine …

For years scientists viewed the deep sea as calm, quiet, and undisturbed, with marine
species existing in an ecologically stable and uniform environment. Recent discoveries have …

Ectomycorrhizal fungi are symbiotically associated microorganisms which ecological
importance has been repeatedly demonstrated. There has been a considerable amount of …

The bioavailibility of dissolved organic nitrogen (DON) in river water entering estuaries was
examined for the Delaware and Hudson Rivers, USA. Water collected from above the …

Carboxylic acids (CAs), amino acids (AAs) and carbohydrates (CHs) in dissolved free forms
can be readily assimilated by aquatic bacteria and metabolized at high growth efficiencies …