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春季中国南黄海与东海海水中溶解氨基酸的分布和组成

DOI: 10.13634/j.cnki.mes20150211, PP. 217-224

Keywords: 溶解态氨基酸,南黄海与东海,分布,组成

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Abstract:

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Chla、DOC、DIN等环境因子均无显著相关性。

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