Amino acids in marine particulate matters and sediments and their role as indicators for organic matter degradation.

• Published in: Ying yong sheng tai xue bao Vol. 29; no. 9; p. 3147
• Main Authors: Zhou, Bu, Yuan, Hua Mao, Song, Jin Ming, Li, Xue Gang, Li, Ning, Duan, Li Qin, Ren, Cheng Zhe
• Format: Journal Article
• Language: Chinese
• Published: China 01-09-2018
• Subjects: Amino Acids - analysis; Environmental Monitoring; Geologic Sediments - chemistry; Nitrogen; Particulate Matter; Seawater - chemistry; Water Pollutants, Chemical - analysis; microorganism; particulate matter; amino acid; diagenetic state; sediment
• ISSN: 1001-9332
• DOI: 10.13287/j.1001-9332.201809.035

As important components of marine organic matters especially of organic nitrogen, amino acids play an important role in organic matter cycles owing to their lability. The concentration, composition, and distribution of amino acids have been widely used to indicate the degradation state of organic matters in particulates and sediments of marine. Here, the distribution, influencing factors of amino acids and their role in indicating degradation of organic matters were systematically summarized. Gly, Glu, Ala, and Asp were the major components of amino acids in marine particulates and sediments. The contents of amino acids in the particles and sediments showed a decreasing tendency from the coastal waters to the open sea, and adecreased with the water depth. The lower value of %AA-C/TOC, %AA-N/TN and degradation index (DI) based on changes in the composition of amino acids indicated the higher degradation degrees of organic matters. The reactivity index (RI) and ratios of D-AA and L-AA (D/L) based on non-protein