Relationship Between Vegetation Feature and Physiognomy Morphology of Mega-dunes in Badain Jaran Desert

CUI Xu-jia; DONG Zhi-bao; LU Jun-feng; WANG Meng; LI Ji-yan; LUO Wan-yin

doi:10.13961/j.cnki.stbctb.2014.05.058

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Relationship Between Vegetation Feature and Physiognomy Morphology of Mega-dunes in Badain Jaran Desert

- Relationship Between Vegetation Feature and Physiognomy Morphology of Mega-dunes in Badain Jaran Desert
- Bulletin of Soiland Water Conservation Vol. 33, Issue 5, Pages: 278-283(2014)
- 作者机构：
  
  1. 陕西师范大学旅游与环境学院,陕西,西安,710062
  2. 中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室,甘肃,兰州,730000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.05.058
  CLC：
- Published：2014
- 稿件说明：
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CUI Xu-jia, DONG Zhi-bao, LU Jun-feng, et al. Relationship Between Vegetation Feature and Physiognomy Morphology of Mega-dunes in Badain Jaran Desert[J]. Bulletin of Soiland Water Conservation, 2014, 33(5): 278-283.
DOI：

CUI Xu-jia, DONG Zhi-bao, LU Jun-feng, et al. Relationship Between Vegetation Feature and Physiognomy Morphology of Mega-dunes in Badain Jaran Desert[J]. Bulletin of Soiland Water Conservation, 2014, 33(5): 278-283. DOI： 10.13961/j.cnki.stbctb.2014.05.058.

摘要

通过对巴丹吉林沙漠伊和吉格德湖高大沙山区野外植被考察

研究了该地区的生物多样性

并分析了该地区植被-沙山地貌形态之间的关系。结果表明

研究区植被种类较少

以旱生物种为主

植被群落分布的垂直特征及差异明显。该区植物种共计6科9属9种

沿沙山上部至底部依次为:草本群落-灌木群落-草本或半灌木群落。沙多分布在背风坡

碟果虫实及白莎蒿多分布在迎风坡。总体群落多样性测度结果

沙山两坡中部多样性指数高

背风坡上部及迎风坡中部均匀度指数高。分层次群落多样性测度结果

由于草本种类单一

草本群落多样性及均匀度指数差别不大

迎风坡中部灌木群落多样性指数最高。高大沙山植被群落特征受整体沙山地貌形态影响

迎风坡植被分布及多样性变化特征与沙山第1和第2序列地貌形态有良好的对应关系。在更为广泛的沙漠发育时期

沙山表面稀疏的植被通过影响输沙率进而拦截沙粒

在维持沙山高度方面具有更为重要作用。

Abstract

Based on the field vegetation investigation of Yihejigede Lake in the Badain Jaran Desert

biodiversity was studied

and the relationship between vegetation and mega-dune morphology was analyzed. The results showed that there were less vegetation types in the study area

mainly composed by xeromorphic species

the vertical distribution and differences of vegetation communities was obvious. Vegetation in the study area belongs to 9 species

9 genera and 6 families

from the top to the bottom of mega-dunes vegetation communities changed from herbaceous community to shrub communities to herb or subshrub community. Agriophyllum squarrosum distributed in the leeward slope

but Corispermum patelliforme and Artemisia blepharolepis distribuled in windward slope; The overall community diversity showed that diversity index was higher in the middle of both mega-dune slopes

and evenness index was higher in the top of leeward slope and the middle of windward slope. The hierarchical community diversity showed that diversity index and evenness index had little difference for herb community because of the relatively single species

the shrub community in the middle of windward slope had the maximum diversity index. The feature of vegetation communities was affected by the whole morphology of mega-dunes

there existed a well corresponding relation between the vegetation characteristics including distribution and diversity in the windward slope and the physiognomy morphology with order 1 and order 2 of mega-dunes. In a broader development period of desert

the sparse vegetation may play an important role in maintaining the height of mega-dunes through influencing sand transport rate and then intercepting the sand.

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Keywords

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