[1]欧杰,王延华,杨浩,等.湖泊沉积物中正构烷烃和碳同位素的分布特征及其环境意义[J].南京师大学报(自然科学版),2012,35(03):98-105.
 Ou Jie,Wang Yanhua,Yang Hao,et al.Distribution Characteristics of n-Alkanes and δ13 C in the Lake Sediments and Their Environmental Significance[J].Journal of Nanjing Normal University(Natural Science Edition),2012,35(03):98-105.
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湖泊沉积物中正构烷烃和碳同位素的分布特征及其环境意义()
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《南京师大学报(自然科学版)》[ISSN:1001-4616/CN:32-1239/N]

卷:
第35卷
期数:
2012年03期
页码:
98-105
栏目:
地理学
出版日期:
2012-09-20

文章信息/Info

Title:
Distribution Characteristics of n-Alkanes and δ13 C in the Lake Sediments and Their Environmental Significance
作者:
欧杰;王延华;杨浩;王红;高文静;徐美娜;
南京师范大学地理科学学院,江苏省环境演变与生态建设重点实验室,江苏南京210046
Author(s):
Ou JieWang YanhuaYang HaoWang HongGao WenjingXu Meina
Jiangsu Key Laboratory of Environmental Change and Ecological Construction,School of Geography Science, Nanjing Normal University,Nanjing 210046,China
关键词:
湖泊沉积物正构烷烃碳同位素环境变化石臼湖流域
Keywords:
lake sedimentsn-alkanesδ13Cenvironment changeShijiu Lake
分类号:
X13;P593
摘要:
正构烷烃碳分子及碳同位素的分布特征在环境领域的应用是目前全球变化研究的热点问题之一. 本文以湖泊沉积物为研究载体,综述了国内外利用正构烷烃及碳同位素技术在湖泊及其流域内生物源的识别、植被类型的判断及古植被、古气候的恢复和重建等方面的研究进展. 并且以石臼湖流域为例,探讨了运用该技术指示湖泊及其周围流域近现代气候与环境变化的可行性. 结果表明: ( 1) 石臼湖沉积物中正构烷烃化合物主要分布在nC23 ~ nC31 ,呈现明显的奇偶优势; ( 2) 从底层至表层,沉积物中高碳数正构烷烃的相对含量有逐渐减少的趋势,而低碳数正构烷烃含量逐渐增加. 据此可以初步推断,近百年来石臼湖流域内的陆生高等植被呈现出相对退化的趋势,而菌藻类和其他水生植物则相对增多,水体富营养化问题逐渐突显,生态环境不断恶化.
Abstract:
In recent years,the application of n-alkanes carbon molecules and carbon isotopic distribution has been one of the hot issues in global change research in the field of environment. This paper summarized the achievements of domestic and foreign utilized the n-alkanes and δ13C in biological input identification,vegetation type judgment and recovery and reconstruction of paleovegetation and paleoclimate. The climate and environment changes in Lake Shijiu were discussed using n-alkanes and δ13 C. The results show that the distribution of n-alkanes compounds in Shijiu Lake sediments is mainly derived from terrestrial higher vegetations,the most abundant components are nC27 ~ nC31 ,which show a significant odd-even predominance. Besides,from the bottom to surface,the relative content of long chain n-alkanes in the sediments was decreased while the short chain n-alkanes was increased. It can be inferred that terrestrial higher vegetations in this basin were gradually decreased while algae and other macrophytes were gradually increased over the past century. This indicates that eutrophication phenomenon has highlighted and ecological environment is becoming worse in the Basin of Shijiu Lake recently.

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金重点项目( 41030751) 、国家自然科学基金( 50908116) 、中国博士后科学基金资助项目( 2011M501250) 、江苏省博士后科研资助计划( 1101015B) 、南京师范大学211 基金项目( 2009112XGQ0054) 、江苏高校优势学科建设工程资助项目联合资助.
通讯联系人: 王延华,博士,副教授,研究方向: 生态修复. E-mail: wangyanhua@ njnu. edu. cn
更新日期/Last Update: 2013-03-11