玛纳斯河谷水源地植被分布特征研究

Research on Distribution Characteristics of Vegetation in Water Head Area of Manas River Valley

通过对玛纳斯河谷水源地区域植被样方分析发现,该区域植被以旱生植物为主,植被分布主要受地形地貌、地下水埋深的综合影响,沿中间洼地向东西两侧不同阶地呈显著的垂直地带性分布规律,低地草甸植被一般生长在地下水埋深不足2m的区域,灌木半灌木、乔木等一般位于地下水埋深低于9m的区域,地下水埋深大于30m的区域,基本为山地荒漠草原植被。进一步对研究区植被群落优势度进行了计算,结果表明研究区优势植被群落依次为红柳群落、芦苇群落、苦豆子群落、沼柳群落、粉苞苣群落、锦鸡儿群落、榆树群落等。

Based on the analysis of vegetation quadrats in the water head area of Manas River Valley,the vegetation in this area is dominated by xerophytes,and the distribution of vegetation is mainly affected by terrain and groundwater depth. The distribution pattern along the middledepression to different terraces on the east and the west is significant vertical zonality. Lowland meadows generally grow in zones where the groundwater depth is less than 2m. Shrubs,sub-shrubs and treesgenerally grow in zoneswhere the groundwater depth is less than 9m. Mountain desert steppe covers mostly zones with groundwater depth being greater than 30 m. The dominance of plant communities in the study area was further calculated. The result showed that the ranking of plant communities by dominance in the study area wastamarix ramosissima community,phragmites community,sophora alopecuroides community,salix brachypoda community,chondrilla community,caragana sinica community and Ulmus pumila community.