| 塔里木河上游与下游地区天然植被群落特征对比分析 |
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| 引用本文： | 郑奕.塔里木河上游与下游地区天然植被群落特征对比分析[J].干旱区资源与环境,2008,22(1):152-156. |
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| 作者姓名： | 郑奕 |
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| 作者单位： | 中国气象局乌鲁木齐沙漠气象研究所,乌鲁木齐,830002 |
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| 基金项目： | 科技部社会公益研究专项(2005DIB6J113)资助 |
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| 摘 要： | 塔里木河是我国干旱区最长的一条内陆河,同时塔里木河流域也是我国生态环境脆弱地区之一,该流域荒漠化程度日益加剧,具体表现为土地沙漠化、土壤盐渍化、草场退化、生物多样性减少等,这些都严重的制约了区域社会经济的可持续发展。本文根据对塔里木河的实际调查资料,分别计算了上、下游典型样地的物种多样性指数、丰富度和均匀度指数,对塔里木河上、下游地区的天然植被的群落特征进行了对比分析。结果表明:塔里木河流域内的植物区系组成贫乏,群落结构简单,随着上游至下游水量的减少,下游地区天然植被较上游地区普遍退化,植物种类及群落类型均少于上游地区,生态系统非常脆弱。
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| 关 键 词： | 物种多样性指数 对比分析 退化 |
| 文章编号： | 1003-7578（2008）01-152-05 |
| 收稿时间： | 2006-11-23 |
| 修稿时间： | 2006年11月23 |
Comparative Analysis on Plant Community Characteristics in the Upper and Lower Reaches of Trim River |
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| ZHENG Yi.Comparative Analysis on Plant Community Characteristics in the Upper and Lower Reaches of Trim River[J].Journal of Arid Land Resources and Environment,2008,22(1):152-156. |
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| Authors: | ZHENG Yi |
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| Abstract: | Tarim River is the longest inland river in arid area of China.At the same time,it also is one of the ecological environment vulnerable areas.Desertification is serious.Concrete manifestations are as follows: land desertification,soil salinization,grassland degradation,and reduction in biodiversity.All of these seriously destroyed the foundation of regional social and economy sustainable development.Based on the inquisitional data of sampling sites,this research comparatively analyzed the biodiversity of the natural plant community in the upper and lower reaches of Trim River by adopting diversity index,richness index and evenness index.The results showed that species in Trim River are poorer and the configuration of community is simple.With the water resources of Tarim River become smaller and smaller from the upriver to the downstream,the degradation of plant community becomes more and more serious.Ecological environment is very fragile in the lower Trim River. |
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| Keywords: | biodiversity index comparative analysis degeneration |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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