生物多样性 ›› 2001, Vol. 09 ›› Issue (3): 222-227.doi: 10.17520/biods.2001034

• 论文 • 上一篇    下一篇

热带次生林刀耕火种过程中土壤节肢动物群落结构及多样性的变化

杨效东, 唐勇, 唐建维   

  1. (中国科学院西双版纳热带植物园昆明分部,  昆明 650223)
  • 收稿日期:2001-01-19 修回日期:2001-05-22 出版日期:2001-08-20
  • 通讯作者: 杨效东

Change in structure and diversity of soil arthropod communities after slash and burn of secondary forest in Xishuangbanna, Yunnan Province

YANG Xiao-Dong, TANG Yong, TANG Jian-Wei   

  1. Kunming Division of Xishuangbanna Tropical Botanical Garden , Chinese Academy of Sciences , Kunming 650223
  • Received:2001-01-19 Revised:2001-05-22 Online:2001-08-20
  • Contact: YANG XiaoDong

通过模拟刀耕火种过程,对热带次生林土壤节肢动物群落结构及多样性在刀耕火种过程中的 变化进行了初步研究。结果表明:火烧1周后,土壤节肢动物类群数和个体数从次生林地的14 类、564头降为7类、164头,并且在群落组成上发生了较大变化。膜翅目在烧后1天成为突出 优势类群,蜱螨目在烧后1周成为唯一的优势类群。而在多样性方面,土壤节肢动物群落类 群数(丰度)、个体数(多度)和DG多样性指数在刀耕火种过程中均降低。土壤节肢动 物的 垂直分布因刀耕火种干扰发生了很大变化,尚存土壤节肢动物随干扰强度的加剧,出现逐步 由土壤表层向深层迁移的现象。一些土壤节肢动物在土层间做垂直迁移活动,说明土壤层在 一定程度上减轻了刀耕火种对它们的破坏作用,维持了某些类群的种群数量及群落多样性。

The change in st ructure and diversity of soil arthropod communities of secondary forest after the simulated process of slash-and-burn was studied in Xishuangbanna. The results showed that colonies and individuals of soil arthropod communities declined from 14 colonies , 564 individuals in secondary forest to 7 colonies , 164 individuals in slash-and-burn fields one week after burning. The composition of soil arthropod communities was also changed. The proportion of individuals of Hymenoptera (ants) in burned remnants was greatly increased on the first day after burning , and this was obviously the dominant group in the soil arthropod community. The proportion of individuals of Acari was greatly increased during the first week after burning , and it was the only dominant group of the soil arthropod community in the field. The diversity of the soil arthropod community was decreased and the verticalst ructure of the community was disrupted by slash-and-burn. After the slash-and-burn process , there were many more colonies and individuals of soil arthropod in the lower soil than in the surface soil. The dest ruction by slash-and-burn of soil arthropod communities was reduced to a certain extent in deeper soil layers. Some soil arthropods can keep their numbers and species by moving lower in the soil during the slash-and-burn process.

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