| 红碱淖湖泊沉积记录的近五十年来的环境变化 |
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| 引用本文： | 李双,陈硕,张家武.红碱淖湖泊沉积记录的近五十年来的环境变化[J].安徽农业科学,2010,38(5):2534-2537,2576. |
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| 作者姓名： | 李双 陈硕 张家武 |
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| 作者单位： | 兰州大学西部环境教育部重点实验室,甘肃兰州,730000 |
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| 基金项目： | 国家自然科学基金(40871093) |
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| 摘 要： | 对红碱淖湖泊短钻岩芯沉积物进行了粒度、碳酸盐以及有机质含量等环境代用指标分析,恢复了红碱淖近五十年以来的环境变化过程。依据红碱淖湖泊沉积记录,可以将红碱淖过去五十年的环境变化大致划分为2大阶段：第一阶段（A阶段,1957～1996年）,湖泊环境变化的影响因素以自然因素为主,经历了迅速扩张（1957～1969年）、基本稳定（1969～1990年）和渐趋萎缩（1990～1996年）三个亚阶段;第二阶段（B阶段,1996～2005年）,湖泊面积缩小,但指标中碳酸盐含量减少,有机质含量快速增加,指示湖泊沉积环境受人类活动影响强烈,碳酸盐保存条件发生改变,碳酸盐含量在这种情况下已不能指示湖泊环境变化。
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| 关 键 词： | 红碱淖 粒度 TOC 碳酸盐 环境变化 |
Environmental Changes Recorded by Lake Sediments from Hongjiannao Lake during Recent Fifty Years |
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| LI Shuang et al,Lanzhou University,Lanzhou,Gansu.Environmental Changes Recorded by Lake Sediments from Hongjiannao Lake during Recent Fifty Years[J].Journal of Anhui Agricultural Sciences,2010,38(5):2534-2537,2576. |
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| Authors: | LI Shuang Lanzhou University Lanzhou Gansu |
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| Institution: | LI Shuang et al(Key Laboratory of Western China's Environmental System(Ministry of Education),Lanzhou University,Lanzhou,Gansu 730000) |
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| Abstract: | Particle size,the contents of carbonate and organic matter were analyzed on lake sediments from a short core in Hongjiannao Lake to discuss the environmental changes during the past decades.On the basis of the records,the environmental changes in Hongjiannao Lake was approximately divided into 2 stages.In stage A(1957-1996),the lake evolution and the environmental change were mainly influenced by natural factors.It contains three sub-stages: A1(1957-1969),a period of lake expansion,A2(1969-1990),a stable pe... |
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| Keywords: | Hongjiannao Lake Particle size TOC Carbonate Environmental changes |
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