生物多样性 ›› 2001, Vol. 09 ›› Issue (4): 329-335.doi: 10.17520/biods.2001049

• 论文 • 上一篇    下一篇

鄂尔多斯高原地区昆虫物种多样性研究

于晓东, 周红章, 罗天宏   

  1. (中国科学院动物研究所,  北京 100080)
  • 收稿日期:2001-03-20 修回日期:2001-05-08 出版日期:2001-11-20
  • 通讯作者: 周红章

Species diversity of insects on the Ordos Plateau, Northwest China

YU Xiao-Dong, ZHOU Hong-Zhang, LUO Tian-Hong   

  1. Institute of Zoology , Chinese Academy of Sciences , Beijing 100080
  • Received:2001-03-20 Revised:2001-05-08 Online:2001-11-20
  • Contact: ZHOU HongZhang

鄂尔多斯高原有特殊生境类型,本文研究了该地区的昆虫物种多样性变化及影响因素,得到以下结果:(1)利用巴氏罐诱法得到昆虫标本约5159号,其他无脊椎动物标本291号,鞘翅目为优势昆虫类群,其数量占昆虫标本总数的45.8%,其中拟步甲和步甲个体数量较多,占所有甲虫总数的92.8%;(2)根据甲虫的物种多样性和丰富度的特点将4个调查地点分为两组:一组为以荒漠灌丛为主的杭锦旗和植被类型多样化的石灰庙,物种多样性指数、丰富度和个体数量较高;另一组为以人工植被区为主的石龙庙和新街镇,物种均匀度指数较高;(3)主成分排序(PCA)可以将该地区的甲虫群落分为人工植被区和荒漠植被区2种类型,反映降水和植被类型是决定甲虫群落组成的关键因素;(4)降水梯度对甲虫物种多样性有很大影响,物种多样性指数、均匀度指数与降水梯度呈显著的正相关关系;个体数量与降水梯度呈显著的负相关关系;物种的丰富度与降水梯度没有相关关系。以上结果表明,在鄂尔多斯高原地区,只有减少人为干扰,加强保护脆弱的原有植被,才能保护特有的昆虫种类;只有大力开展固沙造林植草,才能改善环境,提高该地区的昆虫物种多样性。

This study investigates characteristics and patterns of insect species diversity on the Ordos Plateau , a special ecotone with ext remely arid environment s in Northwest China. Using pitfall t raps , we collected 5159 insect specimen and 291 other invertebrates. As the most dominant group , beetles accounted for 45. 8 %of the total collected insect s , and among beetles , 92. 8 %of individuals are Tenebrionidae and Carabidae. Plotting the log values of individual numbers of different beetle species , from high to low , result s in patterns that separate the four investigated sites into two groups. One includes Hangjinqi , with mainly desert shrub environment s , and Shihuimiao with a variety of habitat s of different vegetation. The other includes Shilongmiao and Xinjiezhen with different environment s , frequently artificial regeneration. The former exhibit s high species diversity and richness , whereas the latter exhibit s high evenness. Principal Component Analysis (PCA) ordination of beetle communities indicates that the species dist ribution was determined by precipitation gradient and vegetation types. A positive correlation is seen between precipitation and beetle species diversity and evenness , while a negative correlation is one exhibited between precipitation and individual numbers. Species richness does not show such patterns. Thus , in an arid region as the Ordos Plateau , special insect species and their natural communities can be preserved only when the original vegetation is well protected and the disturbances of human activity are effectively limited. The environment s in this region can be improved and a high insect diversity can be developed when regeneration is increased and drift sanddune is decreased in most part s of this region.

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