大亚湾海域溶解游离氨基酸及其与环境的关系

DISSOLVED FREE AMINO ACIDS AND ITS RELATIONSHIP WITH ENVIRONMENT FACTORS IN DAYA BAY

对大亚湾海域溶解游离氨基酸(DFAA)的分布特征及其影响因素进行了研究。现场采样调查分别于1995年5月、11月和2000年4月进行。结果表明 :(1)大亚湾海域DFAA的含量较高 ,在0.69～4.73μmol/L之间 ,平均2.16±0.87μmol/L,可能主要源于较为旺盛的生物活动 ;(2)DFAA含量在海域的平面分布变化较大 ,垂直分布和季节及年变化不明显 ;(3)DFAA与海水中的DOC呈正相关、与叶绿素呈负相关关系 ,与TIN的相关性则呈季节变化 ,生物效应可能是影响该海域DFAA含量的主要因素。

Concentration of DFAA in Daya Bay was measured for the first time during three cruises in May.,1995, Nov.,1995 and Apr.,2000. DFAA concentrations are in a range of 0.69-4.73 μmol/L with an average of 2.16±0.87 μmol/L, reflecting the correlation with high bioactivity. The horizontal distribution of DFAA varies in a larger scope , the vertical and seasonal distribution are not very obvious .It is also found that the content of DFAA is related positively to DOC, negatively to chloropyll-a, and the relationship between DFAA and TIN varies with season, indicating that biological effect play an important role in variation of DFAA concentration.