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| 滇池湖泊沉积物中游离类脂物的有机地球化学特征 | |
| 引用本文： | 房吉敦,吴丰昌,熊永强,王丽芳,李芸.滇池湖泊沉积物中游离类脂物的有机地球化学特征[J].地球化学,2009,38(1). |
| 作者姓名： | 房吉敦 吴丰昌 熊永强 王丽芳 李芸 |
| 作者单位： | 1. 中国科学院,地球化学研究所,环境地球化学国家重点实验室,贵州,贵阳,550002;中国科学院,广州地球化学研究所,有机地球化学国家重点实验室,广东,广州,510640 2. 中国科学院,地球化学研究所,环境地球化学国家重点实验室,贵州,贵阳,550002 3. 中国科学院,广州地球化学研究所,有机地球化学国家重点实验室,广东,广州,510640 |
| 基金项目： | 中国科学院有机地球化学国家重点实验室开放基金 |
| 摘 要： | 在对滇池湖泊沉积物有机质总体特征分析的基础上,对沉积物中可溶性有机质的组成进行了定量测定,并揭示了其剖面变化特征.研究结果表明:(1)正构烷烃组分具有较强的稳定性,反映出滇池沉积有机质以菌藻类来源为主,沉积柱上、下两段存在陆源高等植物输入相对增加的特征,且从下往上存在草本植物相对贡献增加的特征;(2)脂肪醇组分,以具有强烈偶碳优势的高碳数脂肪醇为主,反映了沉积有机质中陆源输入的部分;(3)脂肪酸组分揭示出可溶有机质中以浮游植物贡献为主,局部层段存在相对较强的细菌改造作用.因此,湖泊沉积物记录了滇池从一个贫营养的湖泊演变成富营养化湖泊的过程,特别是最近几十年,滇池内源有机物和陆源有机物的输入都呈现快速增长的趋势,结合同位素组成特征表明滇池进入了重富营养化阶段. |
| 关 键 词： | 湖泊沉积物 正构烷烃 脂肪醇 脂肪酸 滇池 |
Organic geochemical characteristics of free lipids in Lake Dianchi sediments |
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| FANG Ji-dun,WU Feng-chang,XIONG Yong-qiang,WANG Li-fang,LI Yun.Organic geochemical characteristics of free lipids in Lake Dianchi sediments[J].Geochimica,2009,38(1). | |
| Authors: | FANG Ji-dun WU Feng-chang XIONG Yong-qiang WANG Li-fang LI Yun |
| Institution: | FANG Ji-dun1,2,WU Feng-chang1,XIONG Yong-qiang2,WANG Li-fang1 and LI Yun2 1.State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China,2.State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Guangzhou 510640 |
| Abstract: | On the basis of the investigation of bulk characteristics of organic matter in Lake Dianchi sediments,the soluble lipids in the sediments were determined quantitatively.The results indicate that n-alkanes were relatively stable,which reflecting that sedimentary organic matter in Lake Dianchi sediments were derived dominantly from bacteria and algae,and occurred an increasing trend of terrestrial higher-plant input in both upper and lower sections of the core,and the increasing of herbage plant contribution ... |
| Keywords: | lake sediments n-alkanes alkanols fatty acids Lake Dianchi |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |