地理学报 ›› 2008, Vol. 63 ›› Issue (11): 1123-1130.doi: 10.11821/xb200811001

• 西部地理环境 •    下一篇

塔里木河中下游荒漠河岸林植被对地下水埋深变化的响应

郝兴明1,2, 陈亚宁1,2, 李卫红1,2, 赵锐锋1,2, 朱成刚1,2   

  1. 1. 中国科学院新疆生态与地理研究所, 乌鲁木齐830011;
    2. 中国科学院绿洲生态与荒漠环境实验室, 乌鲁木齐830011
  • 收稿日期:2008-04-25 修回日期:2008-09-27 出版日期:2008-11-25 发布日期:2010-08-03
  • 通讯作者: 陈亚宁, 研究员, 博导. E-mail:chenyn@ms.xjb.ac.cn E-mail:chenyn@ms.xjb.ac.cn
  • 作者简介:郝兴明, 博士. E-mail: haoxm@ms.xjb.ac.cn
  • 基金资助:

    中国科学院重要方向项目(KZCX2-YW-127); 中国科学院西部行动计划项目(KZCX2-XB2-03); 国家自然科学基金(40701011; 30500081) 共同资助

Response of Desert Riparian Forest Vegetation to Groundwater Depth Changes in the Middle and Lower Tarim River

HAO Xingming1,2, CHEN Yaning1,2, LI Weihong1,2, ZHAO Ruifeng1,2, ZHU Chenggang1,2   

  1. 1. Xinjiang Institute of Ecology and Geography, CAS, Urumqi 830011, China;
    2. Key Laboratory of Oasis Ecology and Desert Environment, CAS, Urumqi 830011, China
  • Received:2008-04-25 Revised:2008-09-27 Online:2008-11-25 Published:2010-08-03
  • Supported by:

    Knowledge Innovation Program of CAS, No. KZCX2-YW-127; The CAS Action-plan for West Development, No.KZCX2-XB2-03; National Natural Science Foundation of China, No.40701011; No.30500081

摘要:

结合塔里木河中下游74 个植被样地和74 眼地下水位监测井(2005-2007 年) 数据, 将 地下水位按不同埋深划分为0~2 m, 2~4 m, 4~6 m, 6~8 m, 8~10 m 和>10 m 6 个梯度, 对不同地下水埋深下的群落盖度、物种多样性进行了分析, 并探讨了主要植物种分布频率与地 下水埋深的关系。结果表明: 在地下水位2~4 m 时, 物种多样性最高, 其次为4~6 m, 再次为0~2 m; 当地下水位在6 m 以下时, 物种多样性锐减。塔里木河中下游主要植物最适宜水位在2~4 m 之间; 这些植物能够正常生长的地下水埋深区间为3~6 m。这表明, 塔里木河下 游植被恢复的地下水位应确保达到6 m 以上。

关键词: 地下水埋深, 物种多样性, 高斯回归模型, 塔里木河中下游

Abstract:

Based on the data collected from 74 vegetation plots and groundwater depth monitoring wells (2006 to 2007) in the middle and lower reaches of the Tarim River, the groundwater table was divided into six gradients (0-2, 2-4, 4-6, 6-8, 8-10 and >10 m) to compare the influence of groundwater level on coverage, plant diversity and plants appearance frequency. The results showed that plant diversity was the highest at the 2-4 m level, followed by 4-6 m and then 0-2 m. When the groundwater depth dropped to below 6 m species diversity decreased tremendously, and the slope of the Hill's index (diversity ordering) tended to level off. Thus, the optimum groundwater level for major plants growth is 2-4 m and the threshold groundwater depth is about 6 m. To restore vegetation and ecosystem of the lower reaches of the Tarim River, the groundwater depth must be kept at a minimum of 6 m.

Key words: groundwater depth, species diversity, Gaussian regression, Tarim River