长江口及其邻近海域颗粒态氨基酸的分布以及对有机质降解和来源的指示

	长江口及其邻近海域颗粒态氨基酸的分布以及对有机质降解和来源的指示
其他题名	Distribution of particulate amino acids in the Changjiang Estuary and its adjacent sea and their indications for degradation and sources of organic matter
	张敬慧 1; 陈岩 1; 杨剑 2; 杨桂朋 1
发表期刊	海洋环境科学
ISSN	1007-6336
	2022
卷号	41 期号:2 页码:283-292
关键词	颗粒态氨基酸颗粒有机碳来源降解长江口
英文摘要	A total of 50 samples were collected to investigate the distribution and composition of particulate amino acids(PAA)in the Changjiang Estuary and its adjacent East China Sea in March, 2018. The results showed that the average concentration of PAA was(1.86 1.02)mumol/L(0.76~5.55 mumol/L). The major components of PAA in this study were Asp(aspartic acid), Gly(glycine acid), Ser(serine acid), Ala(alanine acid)and Glu(glutamic acid). The average concentrations of particulate organic carbon(POC)and particulate nitrogen(PN)were(74.21 37.70)mumol/L(18.06~238.66 mumol/L)and(7.52 3.46)mumol/L(2.27~ 19.86 mumol/L), respectively. The distributions of PAA, POC and PN showed similar trends, with elevated concentrations were found at the mouth of the Changjiang River and nearshore stations of the study area. The vertical distributions of PAA, POC and PN exhibited a uniform pattern. The C/N ratio in this study gradually decreased seaward, reflecting the influence of terrestrial input. Derivative parameters Asp/Gly and Ser + Thr [mol%] based on amino acids indicated that POM was dominated by diatomaceous organic matter, which might be due to the dominant growth of diatoms in the study area. No correlation were found between the PAA-C(N)% and the degradation index(DI), respectively. This discrepancy may be related to the application of PAAC(N)% and DI to different stages of degradation and the diversity of sources and transformations of amino acids.
中文摘要	本研究于2018年3月采集长江口及其邻近海域50个站位样品,对颗粒态氨基酸(PAA)的分布与组成进行了分析。结果表明:PAA的平均浓度为(1.86±1.02)μmol/L(0.76~5.55μmol/L),其主要组分为天门冬氨酸(Asp)、谷氨酸(Gly)、丝氨酸(Ser)、丙氨酸(Ala)和甘氨酸(Glu)。颗粒有机碳(POC)和颗粒氮(PN)的平均浓度分别为(74.21±37.70)μmol/L(18.06~238.66μmol/L)和(7.52±3.46)μmol/L(2.27~19.86μmol/L)。PAA、POC与PN具有相似的分布特征,长江口内浓度低于近岸浓度,近岸浓度高于远岸浓度,垂直分布上较为均匀。研究海域中的C/N由近岸向远海逐渐降低,表明陆源输入有机质的影响逐渐降低。基于氨基酸的衍生参数Asp/Gly和Ser+Thr(苏氨酸)[mol%]表明该海域颗粒物中有机质主要源于硅质碳源,与硅藻在该海域中相对较高的生物量有关。碳、氮归一化产率[PAA-C(N)%]以及降解因子(DI)所指示的降解趋势并不完全一致,这或许与PAA-C(N)%和DI适用于不同降解阶段以及氨基酸来源与转化的多样性有关。
文章类型	期刊论文
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:7203155
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/34121
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心
作者单位	1.中国海洋大学化学化工学院,海洋化学理论与工程技术教育部重点实验室,山东青岛266100; 2.中国科学院烟台海岸带研究所,海岸带环境工程技术研究中心,山东烟台264003
推荐引用方式 GB/T 7714	张敬慧,陈岩,杨剑,等. 长江口及其邻近海域颗粒态氨基酸的分布以及对有机质降解和来源的指示[J]. 海洋环境科学,2022,41(2):283-292.
APA	张敬慧,陈岩,杨剑,&杨桂朋.(2022).长江口及其邻近海域颗粒态氨基酸的分布以及对有机质降解和来源的指示.海洋环境科学,41(2),283-292.
MLA	张敬慧,et al."长江口及其邻近海域颗粒态氨基酸的分布以及对有机质降解和来源的指示".海洋环境科学 41.2(2022):283-292.