摘要
利用中国第18和21次南极考察获取的南极普里兹湾沉积物样品,分析了其中的有机碳和糖类物质的含量及组成,结果表明糖类和有机碳的分布受上层水体的初级生产、地形条件和水体垂直稳定度等多种因素的控制。表层沉积物中糖类物质的平均含量为3.03 mg/g,最高值为5.60mg/g,出现在湾内的毗邻陆架区。沉积物有机碳含量与表层海水叶绿素a具有良好的相关性,能够反映上层水体初级生产的变化。单糖组分的研究可以判定其生源母质,沉积物中有机质的来源主要是海洋上层生物。糖类是易被降解利用的有机质,通过糖类物质中六碳糖的比重及其垂直分布的变化可以判断出不同站位沉积速率的相对快慢。
Organic carbon and neutral monosaccharides were performed on sediments from Prydz Bay（Antarctic） during the CHINARE-18/21 cruise. The results show that the distributions of organic carbon and neutral monosaccharides in surface sediments were controlled by primary production in upper water, submarine topography and water stability. The average cotent of neutral monosaccharides in surface sediment is 3.03 mg/g, the highest value is 5.60 mg/g and occurred in adjacent continental shelf. The relation between concentration of organic carbon and Chl a in surface water is close. The neutral monosaccharides compositions can reflect the source of biogenic matter. Plankton in upper ocean are the main source of organic carbon in surface sediment. The neutral monosaccharides are liable to degrade. We can presume the relative sedimentation rate by the abundance of hexoses and their vertical distributions.
出处
《海洋学报》
CAS
CSCD
北大核心
2008年第1期59-66,共8页
基金
极地战略基金“普里兹湾生物硅的保存机制及生物地球化学意义研究”
国家海洋局极地科学重点实验室开放研究基金资助项目(KP200502)
关键词
沉积物
糖类
沉积速率
普里兹湾
南极
sediments
neutral monosaccharides
deposition rate
Prydz Bay
Antarctic
