秦皇岛海域褐潮暴发区中溶解氨基酸分布特征及季节变化

发布时间：2018-03-13 19:08

本文选题：秦皇岛　切入点：褐潮　出处：《中国海洋大学学报(自然科学版)》2016年05期 　论文类型：期刊论文

【摘要】：通过现场调查,对秦皇岛海域抑食金球藻褐潮暴发区的溶解氨基酸的含量、水平分布、季节变化、组成特征以及与理化因子之间的相关性进行了研究。结果表明:该海区含有较高浓度的溶解结合态氨基酸(DCAA),平均浓度为3.02μmol/L,是总溶解氨基酸(DTAA)的主要组成部分,约占DTAA含量的85%;而溶解游离态氨基酸(DFAA)的含量较低,平均浓度为0.52μmol/L。DCAA和DFAA均有明显的季节变化趋势:3—6月有所升高,7月份明显下降,12月又有所回升。对氨基酸和理化因子的相关性进行分析可知,海水中溶解氨基酸与尿素呈显著正相关(p0.01)。海水中DFAA的个体氨基酸组成以及酸性氨基酸和碱性氨基酸含量的相对大小存在季节差异,这可能与不同种类氨基酸的来源、保存以及抑食金球藻(Aureococcus anophagefferens)对其利用能力不同有关。
[Abstract]:The content, horizontal distribution and seasonal variation of dissolved amino acids in the brown tide outbreak area of Chlorella aureus in Qinhuangdao sea area were investigated. The composition characteristics and the correlation with physicochemical factors were studied. The results showed that there was a high concentration of dissolved bound amino acid (DCAA) in the sea area, and the average concentration was 3.02 渭 mol / L, which was the main component of the total dissolved amino acid (DTAA). The content of dissolved free amino acid (DFAA) was lower than that of DTAA. The average concentration of 0.52 渭 mol/L.DCAA and DFAA showed a significant seasonal variation trend in March / June, and then decreased in July and then increased in December. The correlation between amino acids and physicochemical factors was analyzed. There was a significant positive correlation between dissolved amino acids and urea in seawater. There were seasonal differences in the amino acid composition of DFAA and the relative size of acid and basic amino acids, which might be different from the sources of different amino acids. The utilization ability of Aureococcus anophagefferens was different.
【作者单位】：海洋环境与生态教育部重点实验室;中国海洋大学环境科学与工程学院;海洋国家实验室海洋生态与环境科学功能实验室;中国水产科学研究院黄海水产研究所;海洋化学理论与工程技术教育部重点实验室;
【基金】：海洋公益性行业科研专项(201205031) 国家自然科学基金项目(61271406)资助~~
【分类号】：X55

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