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苏州河和黄浦江颗粒态氨基酸的季节变化

, PP. 99-106

Keywords: 苏州河,黄浦江,氨基酸,氨基酸降解系数DI

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Abstract:

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(ParticulateAminoAcids,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.

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