播磨灘における沈降堆積過程での粒子態アミノ酸の変化 [in Japanese] Variations of amino acid composition in marine particles during sinking and sedimentation processes in the Harima-Nada, Seto Inland Sea [in Japanese]
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Marine suspended matters, sinking particles and surface sediments were collected for the amino acid analyses in the Harima-Nada, Seto Inland Sea, Japan. A cultured diatom, <i>Skeletonema costatum</i>, and a chloromonad, <i>Chattonella marina</i>, sampled from red tide, were also submitted. Amino acid concentrations varied in the range of 7.53 to 45.2 mg/g (n=7) for suspended matter, 12.7 to 92.3 mg/g (n=10) for sinking particle in sediment trap, 5.21 to 8.28 mg/g (n=4) for surface sediment on dry basis. A marked difference in the amino acid composition was observed between the suspended matter and the sinking particle. Sulfur and aromatic amino acid groups were depleted in the suspended matter compared to the phytoplankton and the sinking particle. Individual amino acid concentrations suggest that diagenetic reactions on the sinking particles and the surface sediments. The amino acid fluxes at 5 m above the sea bottom were estimated to be from 21 to 37% of primary pruductivity in surface water layers.
Chikyukagaku 18(2), 45-53, 1985
The Geochemical Society of Japan