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地球科学进展  2010, Vol. 25 Issue (9): 950-959    DOI: 10.11867/j.issn.1001-8166.2010.09.0950
综述与评述     
海洋沉积物中色素生物标志物研究进展
赵军1,姚鹏2,3,于志刚2,3*
1. 中国海洋大学环境科学与工程学院海洋环境与生态教育部重点实验室, 山东青岛 266100;
2. 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;
3. 中国海洋大学化学化工学院海洋有机地球化学研究所, 山东青岛 266100
Progress in Marine Sedimentary Pigments as Biomarkers
Zhao Jun1, Yao Peng2,3, Yu Zhigang2,3
1.Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China;
2. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; 
3. Institute of Marine Organic Geochemistry, College of Chemistry and Chemical Engineering,Ocean University of China, Qingdao 266100, China
 全文: PDF(1264 KB)  
摘要:

海洋沉积物中的光合色素包含着水体、沉积物中浮游和底栖植物以及微生物群落的丰富信息,能表征特定生物来源,在埋藏到沉积物甚至发生某些改变之后仍然保留其源信息,是一类重要的化学生物标志物。结合总有机碳、总氮等其他海洋地球化学参数,沉积色素可用来研究海洋浮游植物和光合细菌的群落组成和丰度,反演海洋初级生产、水体富营养化水平及其历史趋势,指示水体和沉积物氧化还原条件,揭示海域气候条件等现状及其历史变化。沉积色素的研究,对于掌握海洋中碳的生物地球化学循环过程,回溯古环境、古海洋、古生态以及古气候记录,制定合理的海洋管理政策具有十分重要的意义。阐述了沉积物中色素的分类、来源、性质和分析方法,分析了色素在沉积物中的保存和变化规律,探讨总结了沉积色素作为化学生物标志物在海洋学研究中的应用。

关键词: 沉积色素化学生物标志物海洋学高效液相色谱    
Abstract:

   Photosynthetic pigments in marine sediments provide useful information concerning water column and benthic plants and microbial communities in marine accumulated sediments. They are important chemical biomarkers which can characterize certain biotic sources and retain their source information after burial in sediments, even after some alteration.
   Pigments in marine sediments mainly come from pelagic and benthic algae communities, phototrophic bacteria and aquatic higher plants, and  others come from terrestrial environment. Exposure to direct light, warm temperatures (>0℃), pH extremes, and enzymes should be avoided because pigments are labile and can degrade fast in the above environments. All sediment samples should be frozen at -20℃ or colder as soon as possible after sampling and stored at this temperature without additional treatment (e.g., freeze-drying) until just before the analysis of pigments. Since no extraction method is suitable to all kinds of sediments, it is necessary to optimize the extraction method according to the properties of sediment samples. Since 1980, High Performance Liquid Chromatography (HPLC) analyses have become the method of choice for rapid, quantitative determinations of carotenoid, chlorophyll and derivative content in aquatic ecosystems and their sediments.
   Pigments can degrade both in water column and sediment. The degradation rates of pigments can be affected by both their inherited natures and external factors. Usually, pigments undergo different phases of degradations, while they deposit from water columns to sediment-water interfaces, and till to the deep sediments. The degradation products of chlorophylls are more stable than their parents; the carotenoids with 5,6-epoxide function are more labile than those without this function.
   As biomarkers, sedimentary pigments can be used to ①characterize the composition and abundance of phytoplankton communities and their historical changes; ②reflect the primary production and status of eutrophication; ③trace the sources and fates of organic matter; and ④indicate hypoxia events. It is a good choice to combine sedimentary pigments with other marine environmental parameters, such as, biogenic silica, total organic carbon, total nitrogen, ratio of C/N, δ13C and δ15N. These kinds of multiproxy studies have been shown to be a reliable way of describing ecological status changes within a system. The researches on sedimentary pigments have implications for ①understanding the processes of biogeochemical cycles of carbon in marine sediments;②reconstructing the records of palaeoenvironment, paleoceanography, palaeoclimatology, palaeoecology; and ③formulating reasonable ocean management policies.

Key words: Sedimentary pigment    Chemical biomarker    Oceanography    HPLC.
收稿日期: 2009-09-17 出版日期: 2010-09-10
:  P734  
基金资助:

国家自然科学基金重大国际(地区)合作研究项目“长江口及邻近海域底边界层生物地球化学过程研究”(编号:40920164004);国家自然科学基金面上项目“基于特征色素及其组合的海洋浮游藻化学分类方法研究和应用”(编号:40676068);国家自然科学青年基金项目“海洋浮游藻特征色素高分辨高效液相色谱分析方法研究”(编号:40806029)资助.

通讯作者: 于志刚(1962-),男,山东莱阳人,教授,主要从事海洋化学和海洋环境科学研究.      E-mail: zhigangyu@ouc.edu.cn
作者简介: 赵军(1982-),男,山东威海人,博士研究生,主要从事海洋有机地球化学研究. E-mail:j_zhao@yahoo.cn
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赵军,姚鹏,于志刚. 海洋沉积物中色素生物标志物研究进展[J]. 地球科学进展, 2010, 25(9): 950-959.

Zhao Jun, Yao Peng, Yu Zhigang. Progress in Marine Sedimentary Pigments as Biomarkers. Advances in Earth Science, 2010, 25(9): 950-959.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2010.09.0950        http://www.adearth.ac.cn/CN/Y2010/V25/I9/950

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