中文摘要：

以2011年3月南黄海与东海部分海域为研究对象,对其中48个站位海水样品的总溶解氨基酸（THAA）、溶解结合氨基酸（DCAA）、溶解游离氨基酸（DFAA）的浓度分布和组成进行了研究。结果表明：表层海水中THAA的平均浓度为2.98±1.72μmol/L（1.27～8.54μmol/L）,DCAA的平均浓度为2.76±1.63μmol/L（0.91～7.70μmol/L）,DFAA的平均浓度为0.31±0.21μmol/L（0.11～1.14μmol/L）。溶解态氨基酸水平分布的趋势大致呈现出近岸高、远岸低的特点,其中,DCAA与THAA分布规律基本一致。溶解态氨基酸的垂直分布特点为次表层与海水底层出现了高值区。春季南黄海与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DFAA中有5对氨基酸之间存在显著正相关。研究发现海水中溶解氨基酸与Chl 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 seawater samples collected at 43 stations located in the East China Sea and the Yellow Sea in March 2011. The results showed that the average concentration of THAA in the surface water was 2. 98 ± 1. 72 μmol / L（ in the range of 1. 27 to 8. 54 μmol / L）,while the average concentrations of DCAA and DFAA in the surface water were 2. 76 ± 1. 63 μmol / L（ in the range of 0. 91 to 7. 70 μmol /L） and 0. 31 ± 0. 21 μmol / L（ in the range of 0. 11 to 1. 14 μmol / L）,respectively. The concentrations of dissolved amino acids displayed a decreasing trend from inshore to offshore stations,especially DCAA and THAA. In the vertical distribution,the high values of THAA appeared in the subsurface 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 analysis of amino acids indicated that 5 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）.