苏州河和黄浦江颗粒态氨基酸的季节变化简

于2007年1、4、7、10月在苏州河、黄浦江4个采样点采集表层水样，分析了颗粒态氨基酸（Particulate Amino Acids, PAA）的组成及含量；并对比分析了北新泾、河南路桥、十六铺和嫩江码头4个站点氨基酸的季节变化特征；结合颗粒有机碳（POC）、颗粒有机氮（PON）及颗粒态氨基酸的构型特征（D和L型）等参数，探讨了该区域颗粒有机氮的来源和降解情况.结果表明：苏州河氨基酸季节变化比黄浦江大；氨基酸降解系数(DI)分析表明研究区域的氨基酸主要来自现场过程和细菌贡献，其中7月份氨基酸最为新鲜；氨基酸降解系数DI和D构型氨基酸成负相关性关系，表明自然细菌来源的D-氨基酸在降解过程中的变化.

Variation of particulate amino acid in the Suzhou River and the Huangpu River in Shanghai

Surface particulate samples were collected quarterly in 2007 from four sampling points of Suzhou River and Huangpu River for particulate amino acids (PAA) analysis. The comparison among the four sampling sites were made for general parameters (such as particulate organic carbon (POC), particulate organic nitrogen (PON)) and particulate state amino acid parameters (D and L amino acid and degradation index). The results showed that the amino acid changed more dramatically in Suzhou River. Inferred from the variations of Degradation Index (DI), the source of the particulate amino acids in July is the freshest in the both rivers. A good negative correlation relationship between D-Amino acid and DI suggests the variation of bacteria-derived D-AA during the degradation process.