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当前位置: 首页 > 文章 > 古尔班通古特沙漠南缘荒漠秋萌短命植物多样性及其空间分布特征 安徽农业科学 2008,36 (5) 303-305
Position: Home > Articles > Diversity and Spatial Distribution Characteristics of Ephemeral Plants Germinated in Autumn in the Southern Edge of Gurbantunggut Desert Journal of Anhui Agricultural Sciences 2008,36 (5) 303-305

古尔班通古特沙漠南缘荒漠秋萌短命植物多样性及其空间分布特征

作  者：
陈志超;石兆勇;田长彦;冯固
单  位：
中国科学院新疆生态与地理研究所;河南理工大学测绘与国土信息工程学院;中国农业大学资源与环境学院
关键词：
古尔班通古特沙漠;短命植物;秋萌;多样性;空间分布特征
摘  要：
[目的]了解古尔班通古特沙漠秋萌短命植物的种类和空间分布特征。[方法]选择有短命植物分布的典型沙丘,于2004年9、11月～2005年3、8、9月调查古尔班通古特沙漠南缘秋萌短命植物的种类及空间分布特征。[结果]调查区域共发现18种短命植物秋季能够萌发,但覆盖度很小,2004年15种,2005年11种。秋萌的短命植物种类远少于早春萌发,以一年生植物为主,且都处于营养生长期。尖喙牻牛儿苗和囊果苔草分布最多,其空间分布特征表现为丘间>沙丘中部>丘顶。小地形对在干旱区荒漠植物的空间分布具有重要的影响,稍微低洼地方短命植物的分布密度高于较高的地方。[结论]秋季萌发的短命植物以一年生植物种类为主,空间分布受沙丘部位及小地形影响,与土壤含水量的空间变异一致。
译  名：
Diversity and Spatial Distribution Characteristics of Ephemeral Plants Germinated in Autumn in the Southern Edge of Gurbantunggut Desert
作  者：
CHEN Zhi-chao et al(College of Mapping and National Territory Information Engineering,Henan Polytechnic University,Jiaozuo,Henan 454003)
关键词：
Gurbantunggut desert;Ephemeral plants;Germination in autumn;Diversity;Spatial distribution characteristics
摘  要：
[Objective] The purpose was to know about the species and spatial distribution characteristics of ephemeral plants germinated in autumn in Gurbantunggut desert.[Method] By selecting typical dunes distributed with ephemeral plants,the species and spatial distribution characteristics of ephemeral plants germinated in autumn in the southern edge of Gurbantunggut desert were investigated in Sep.and Nov.in 2004 and Mar.,Aug.and Sep.in 2005.[Result] It was discovered in the investigated region that 18 ephemeral plants could germinate in autumn with very little coverage degree,15 species were discovered in 2004 and 11 species were discovered in 2005.The species of ephemeral plants germinated in autumn was far less than that germinated in early spring,the annual was the main species and were all in vegetative growth period.Erodium oxyrrhynchum and Carex physodes were most distributed with their field distribution characteristics being sandy land among dune > middle part of dune > top of dune.The microtopography had important influence on the spatial distribution of desert plants in drought region and the distribution density of ephemeral plants in little shallow region was higher than that in higher region.[Conclusion] The main species of ephemeral plants germinated in autumn were annual,and their spatial distributions were influenced by positions on dunes and microtopography and accorded with the spatial variance of water content in soil.

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