2004 Volume 77 Issue 4 Pages 729-732
Core samples of sediments at depths of 0–300 cm at Rikubetsu, Hokkaido, Japan were analyzed for hexosamine (HA) of glucosamine (Gluam) and galactosamine (Galam). The Gluam and Galam contents were highest at the surface, and drastically decreased with increasing depth: the Gluam and Galam contents were 7.98 and 3.19 μmol/g at a depth of 0–5 cm, respectively. Highly positive correlations for Gluam and Galam versus the microbial cell density, total organic carbon, and total hydrolyzed amino acids were observed. The present results suggest that an exponential degradation for amino compounds on the early stage of diagenesis had occurred, and then the amino compounds decreased asymptotically with time. The degradation rate of amino sugars was slower than that of amino acids in the terrestrial diagenetic pathway. The present study shows the vertical distribution of amino sugars with the trends of other biochemical indicators.
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