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中国沙漠 ›› 2002, Vol. 22 ›› Issue (6): 576-580.

• 研究论文 • 上一篇    下一篇

大型土壤动物在沙漠生态系统物质循环中的作用研究

陈海燕1,2, 刘新民3, 孙卫国4, 孙维4   

  1. 1. 内蒙古师范大学 化学系, 内蒙古 呼和浩特 010022;
    2. 中国科学院 寒区旱区环境与工程研究所沙坡头沙漠试验研究站, 甘肃 兰州 730000;
    3. 内蒙古师范大学 生物系, 内蒙古 呼和浩特 010022;
    4. 内蒙古大学 生命科学学院, 内蒙古 呼和浩特 010021
  • 收稿日期:2002-06-20 修回日期:2002-09-08 出版日期:2002-12-20 发布日期:2002-12-20
  • 作者简介:陈海燕(1959-),女(汉族),内蒙古呼和浩特人,讲师,主要从事生态环境研究和教学工作。
  • 基金资助:
    中国科学院沙坡头沙漠试验研究站开放基金(200017)资助

Effect of Macrofauna on the Material Circulation in Tengger Desert Ecosystem

CHEN Hai-yan1,2, LIU Xin-min3, SUN Wei-guo4, SUN Wei4   

  1. 1. Department of Chemistry, Inner Mongolia Normal University, Hohhot 010022, China;
    2. Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    3. Department of Biology, Inner Mongolia Normal University, Hohhot 010022, China;
    4. College of Life Science, Inner Mongolia University, Hohhot 010021, China
  • Received:2002-06-20 Revised:2002-09-08 Online:2002-12-20 Published:2002-12-20

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摘要： 对腾格里沙漠生态系统大型土壤动物中化学元素含量特征与环境中元素含量关系比较和生物富集量在不同生境下的变化分析结果表明:大型土壤动物中化学元素含量的大小排序为Mg >K >Fe >Ca >Zn >Na >Mn >Cu。对Mg、K、Fe的富集程度较高,对Mn、Cu的富集程度较低。不同动物类群对K、Mg、Fe、Na等元素富集程度的差异要小于对Cu、Mn、Zn等元素富集程度的差异。各生物群对各种化学元素均有较强的富集作用。在研究的几种生境中,大型土壤动物对化学元素的富集基本不受它们相互间在管理方式上不同而导致的环境因素差异的影响。化学元素生物富集量的计算表明,大型土壤动物在沙漠生态系统物质的转化作用中是很重要的。随人工固沙植被演替时间的延长,大型土壤动物对化学元素的生物富集量是呈提高趋势的。

关键词: 腾格里沙漠, 生态系统, 大型土壤动物, 物质循环, 生物富集

Abstract: The chemical element contents of macrofauna in Tengger desert ecosystem and the contents in environment were analyzed and compared in this paper. For analyzing the effect of macrofauna on material circulation in desert ecosystem, the bio-concentration of various chemical elements in the body of macrofauna was studied. The results showed that the contents of chemical elements in are Mg>K>Fe>Ca>Zn>Na>Mn>Cu in order. The bio-concentration of K, Mg, Fe, Na in macrofauna are relative higher than that of Mn, Cu and Zn. In different bio-groups, such as plants, macrofauna and the dead body of plants, the contents of chemical elements are higher than that of in soil, which showed that the bio-concentration capacity of macrofauna and plant to chemical elements are relatively high in Tengger desert ecosystem. On the other hand, the chemical element bio-concentration contents of macrofauna are same in different sites. It can be concluded that macrofauna play a most important role in material circulation of Tengger desert ecosystem. The longer the time of artificial plant succession, the higher the capacity of macrofauna bio-concentration is.

Key words: Tengger desert, ecosystem, macrofauna, material circulation, bio-concentration

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