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博斯腾湖近200年来湖泊环境变化的有机碳氮稳定同位素记录

郑柏颖 曹艳敏 张恩楼 高光

郑柏颖, 曹艳敏, 张恩楼, 高光. 博斯腾湖近200年来湖泊环境变化的有机碳氮稳定同位素记录[J]. 海洋地质与第四纪地质, 2012, 32(6): 165-171. doi: 10.3724/SP.J.1140.2012.06165
引用本文: 郑柏颖, 曹艳敏, 张恩楼, 高光. 博斯腾湖近200年来湖泊环境变化的有机碳氮稳定同位素记录[J]. 海洋地质与第四纪地质, 2012, 32(6): 165-171. doi: 10.3724/SP.J.1140.2012.06165
ZHENG Boying, CAO Yanmin, ZHANG Enlou, GAO Guang. C, N STABLE ISOTOPE RECORDS OF ENVIRONMENTAL CHANGES IN BOSTEN LAKE DURING THE PAST 200 YEARS[J]. Marine Geology & Quaternary Geology, 2012, 32(6): 165-171. doi: 10.3724/SP.J.1140.2012.06165
Citation: ZHENG Boying, CAO Yanmin, ZHANG Enlou, GAO Guang. C, N STABLE ISOTOPE RECORDS OF ENVIRONMENTAL CHANGES IN BOSTEN LAKE DURING THE PAST 200 YEARS[J]. Marine Geology & Quaternary Geology, 2012, 32(6): 165-171. doi: 10.3724/SP.J.1140.2012.06165

博斯腾湖近200年来湖泊环境变化的有机碳氮稳定同位素记录


doi: 10.3724/SP.J.1140.2012.06165
详细信息
    作者简介:

    郑柏颖(1987-),男,硕士生,主要从事湖泊沉积与环境演化研究,E-mail:zby104@126.com

  • 基金项目:

    水专项课题(2009ZX07106-0040)

    环保公益性行业科研专项(200909048)

  • 中图分类号: P597

C, N STABLE ISOTOPE RECORDS OF ENVIRONMENTAL CHANGES IN BOSTEN LAKE DURING THE PAST 200 YEARS

More Information
  • 摘要: 通过对新疆博斯腾湖河口区与敞水区沉积岩心中有机碳、氮稳定同位素分析,结合烧失量、粒度、磁化率等指标,在210Pb、137Cs年代测定的基础上,探讨博斯腾湖近200年来有机质来源变化以及湖泊环境变化过程,结果表明,博斯腾湖流域的农业活动对湖泊敞水区的影响比河口区早。1810-1883年间由于流域内气候由湿转干,湖泊水位下降导致较多陆源物质到达湖泊敞水区,δ13Corg快速下降而δ15N快速上升。1884年新疆建省后,农业活动导致BST16岩心的颗粒变小,δ13Corg偏负而δ15N偏正。1950年后大规模的农业活动导致BST13岩心的δ13Corg降低、δ15N升高,BST16岩心的δ13Corg缓慢上升说明湖泊营养水平开始缓慢上升。1900年后BST16岩心的δ15N快速下降与δ13Corg进一步上升表明了初级固氮藻类增加,湖泊初级生产力进一步提高。
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  • 收稿日期:  2012-05-26
  • 修回日期:  2012-08-17

博斯腾湖近200年来湖泊环境变化的有机碳氮稳定同位素记录

doi: 10.3724/SP.J.1140.2012.06165
    作者简介:

    郑柏颖(1987-),男,硕士生,主要从事湖泊沉积与环境演化研究,E-mail:zby104@126.com

基金项目:

水专项课题(2009ZX07106-0040)

环保公益性行业科研专项(200909048)

  • 中图分类号: P597

摘要: 通过对新疆博斯腾湖河口区与敞水区沉积岩心中有机碳、氮稳定同位素分析,结合烧失量、粒度、磁化率等指标,在210Pb、137Cs年代测定的基础上,探讨博斯腾湖近200年来有机质来源变化以及湖泊环境变化过程,结果表明,博斯腾湖流域的农业活动对湖泊敞水区的影响比河口区早。1810-1883年间由于流域内气候由湿转干,湖泊水位下降导致较多陆源物质到达湖泊敞水区,δ13Corg快速下降而δ15N快速上升。1884年新疆建省后,农业活动导致BST16岩心的颗粒变小,δ13Corg偏负而δ15N偏正。1950年后大规模的农业活动导致BST13岩心的δ13Corg降低、δ15N升高,BST16岩心的δ13Corg缓慢上升说明湖泊营养水平开始缓慢上升。1900年后BST16岩心的δ15N快速下降与δ13Corg进一步上升表明了初级固氮藻类增加,湖泊初级生产力进一步提高。

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