中文摘要：

2010年11月对东海27个站位海水样品中总水解氨基酸（THAA）、溶解结合态氨基酸（DCAA）、溶解游离氨基酸（DFAA）的浓度分布与组成进行了研究,分析了溶解态氨基酸与环境因子之间的关系。结果表明：表层海水中THAA的平均浓度为（0.95±0.42）μmol/L（0.46～2.25）μmol/L。DCAA的平均浓度为（0.80±0.38）μmol/L（0.30～1.81）μmol/L,DFAA的平均浓度为（0.20±0.08）μmol/L（0.08～0.52）μmol/L。溶解态氨基酸的水平分布大致呈现近岸高、远岸低的特点,其中DCAA与THAA分布规律大体一致。溶解态氨基酸的垂直分布特点为在叶绿素最大层与海水底层出现了高值区。秋季东海表层海水中溶解氨基酸主要由天门冬氨酸、谷氨酸、丝氨酸、甘氨酸及丙氨酸构成。表层海水中个体氨基酸间的相关性矩阵显示DCAA和DFAA中分别有2对和9对氨基酸之间存在显著性正相关。本次研究发现溶解氨基酸与叶绿素a、DOC、DIN等环境因子均无显著相关性。

英文摘要：

The distribution and composition of total hydrolyzed amino acids（THAA）,dissolved combined amino acids（DCAA） and dissolved free amino acids（DFAA） were analyzed in the surface seawater samples collected at 27 stations located in the East China Sea in November 2010.The correlations between the dissolved amino acids and environmental factors were also analyzed.The results showed that the average concentration of THAA was（0.95±0.42） μmol/L（in the range of 0.46 to 2.25 μmol/L）,while the average concentrations of DCAA and DFAA were（0.80±0.38） μmol/L（in the range of 0.30 to 1.81 μmol/L） and（0.20±0.08） μmol/L（in the range of 0.08 to 0.52 μmol/L）,respectively.The concentrations of THAA and DCAA displayed a decreasing trend from inshore to offshore stations.In the vertical distribution,the high values of THAA appeared in the chlorophyll a maximum layer and in the bottom layer of the water column.In the study area,major constituents of dissolved amino acids were aspartic,glycine,serine,glutamic acid and alanine acid.Correlation matrix of amino acids indicated that 2 pairs of amino acids in DCAA,9 pairs of amino acids in DFAA showed significant positive correlations.No significant correlations were found between the concentrations of dissolved amino acids and environmental factors such as chlorophyll a,dissolved organic carbon（DOC） and dissolved inorganic nitrogen（DIN）.