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中国沙漠 ›› 2009, Vol. 29 ›› Issue (5): 891-896.

• 生物土壤与生态 • 上一篇    下一篇

漫溢补水干扰后的天然胡杨群落波动特征

陈艳瑞1,2,3, 尹林克1,2*, 白 旭1,2,4   

  1. 1.中国科学院 吐鲁番沙漠植物园, 新疆 吐鲁番 838008; 2.中国科学院 新疆生态与地理研究所 干旱区生物进化与生物多样性保育实验室, 新疆 乌鲁木齐 830011; 3.中国科学院 研究生院, 北京 100049; 4.新疆计量测试研究院, 新疆 乌鲁木齐 830011
  • 收稿日期:2008-05-19 修回日期:2008-11-04 出版日期:2009-09-07 发布日期:2009-09-07

The Fluctuation Characteristics of Natural Populus euphratica Community under Water-overflowing Disturbance

CHEN Yan-rui1,2,3, YIN Lin-ke1,2, BAI Xu1,2,4   

  1. 1.Turpan Eremophytes Botanic Garden, Chinese Academy of Sciences, Turpan 838008, Xinjiang, China; 2.Laboratory of Evolution and Biodiversity Conservation in Arid Region, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 3.Graduate School of Chinese Academy of Sciences, Beijing 100049, China; 4.Xinjiang Research Institute of Measurement and Testing, Urumqi 830011, China
  • Received:2008-05-19 Revised:2008-11-04 Online:2009-09-07 Published:2009-09-07

摘要: 以塔里木河下游荒漠河岸林中的胡杨群落为研究对象,以群落结构特征、物种多样性和优势种为群落波动的表征值,采用固定样地法对漫溢补水干扰下胡杨群落的波动响应特点进行了研究。结果表明:①干扰后胡杨群落物种组成变化明显,群落中物种数和层次呈现增加趋势,群落结构由简单向复杂转化,群落趋于稳定;②干扰前后胡杨群落物种多样性指数波动性较大,群落物种丰富度和多样性都呈增加趋势,而物种分布均匀度略有下降趋势;③漫溢补水干扰下群落中优势种的数量及种类发生改变,其中胡杨的优势度明显增大了。综上可知,地表漫溢补水植被修复措施使流域内的胡杨群落结构趋于复杂、群落层次增加,群落多样性增加,优势种及其优势度增加,总体上胡杨群落的波动为正向波动。

关键词: 塔里木河下游, 波动, 人为干扰, 天然群落, 胡杨

Abstract: The main purpose of this study is to examine the fluctuation characteristics of natural Populus euphratica community in desert riparian forest under artificial surface water overflowing disturbance in the lower reaches of the Tarim River, China. The survey was conducted at fixed sampling plots. Investigated contents include the community structure, species diversity, and dominant species. The main results are as follows. ①Species composition in Comm. P. euphratica changed significantly. The species numbers and the floristics of the community increased under the disturbance. The community structure transformed from simple to complex, and the vertical stratification tended to increase. ②Both the species richness and species diversity increased obviously, while species evenness decreased under the disturbance. ③The number and variety of dominant species increased. Seen from these it was obvious that surface water overflowing is an effective measure in the process of vegetation restoration, which not only make species composition and community structure transform from simple to complex significantly, but also let the floristics (e.g. species richness), species diversity and dominant species increase. As a whole the fluctuation of Comm. P. euphratica is positive.

Key words: the lower reaches of the Tarim River, fluctuation, artificial disturbance, natural community, Populus euphratica

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