干旱区生态环境知识资源中心(Arid): 民勤绿洲荒漠过渡带群落特征及其物种多样性研究

Arid

	民勤绿洲荒漠过渡带群落特征及其物种多样性研究
其他题名	Community Characteristics and Species Diversity in the Minqin Oasis-desert Ecotone
	汪媛燕; 王立; 满多清
来源期刊	四川农业大学学报
ISSN	1000-2650
出版年	2014
卷号	32 期号:4 页码:355-361
中文摘要	[目的]以民勤绿洲荒漠过渡带为研究对象,沿绿洲向荒漠演变方向,测定和分析不同区段各物种在群落组成中的地位和作用,以期为该区域荒漠化防治和生态恢复提供依据。[方法]从绿洲外围边界开始,沿绿洲至荒漠(东南-西北)方向,采用样线调查方法,测计区域内不同区段群落中植物种类、数量、频度、冠幅、高度和地径等,计算获得各物种重要值及其多样性指数。[结果]研究区不同区段共有23种植物,隶属于10科23属,其中灌木6科8种,草本8科15种;灌木层重要值最大的为Ⅲ-灌丛沙包区唐古特白刺,达到153.48%,草本层则以藜科占据主导地位;基于重要值计算得到的不同区段灌木层和草本层的多样性均无明显差异,灌木层和草本层的H’、D和D_(mc)随着绿洲向荒漠过渡均逐渐减小,J_(sw)值由于唐古特白刺出现单优现象呈现波动变化。[结论]研究区内群落灌木层更新和生长相对稳定,但群落整体结构简单,物种多样性低,克隆植物的有效生长在一定程度上加速了物种多样性的简单化。
英文摘要	[Objective]Along the evolution direction from oasis to desert in the Minqin oasis-desert ecotone,the position and function of each species in the community composition among different segments were investigated and analyzed.The results could provide the basis for the regional desertification control and ecological restoration.[Method]From oasis to desert (northwest-south-east),line transect method was used to investigate the vegetation types,volume,crown breadth, height and ground diameter,etc.The important value and species diversity index were calculated.[Results]There were 23 species in different sections in the area,belonging to 10 families and 23 genera.There were 6 families 8 species in shrubs and 8 families 15 species in herbs.The largest important value of shrub (153. 48%)was the Nitrariatangutorum in the sandbags area.The Chenopodiaceaedominated herb layer.There were no obvious differences in the diversity of shrub and herb based on important value in the different stages.The H’,D and D_(mc) of shrub and herb decreased from oasis to desert transition.The J_(sw) value fluctuated due to individual advantage of Nitrariatangutorum.[Conclusion]In the study area,shrubs regeneration and growth was relatively stable.However,community structure was simple and species diversity was low.The growth of clonal plants,to some extent,accelerated the simplification of species diversity.
中文关键词	民勤 ; 绿洲荒漠过渡带 ; 群落特征 ; 重要值 ; 物种多样性
英文关键词	Minqin oasis-desert ecotone community characteristics important value species diversity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5321403
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231821
作者单位	甘肃农业大学林学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	汪媛燕,王立,满多清. 民勤绿洲荒漠过渡带群落特征及其物种多样性研究[J]. 甘肃农业大学,2014,32(4):355-361.
APA	汪媛燕,王立,&满多清.(2014).民勤绿洲荒漠过渡带群落特征及其物种多样性研究.四川农业大学学报,32(4),355-361.
MLA	汪媛燕,et al."民勤绿洲荒漠过渡带群落特征及其物种多样性研究".四川农业大学学报 32.4(2014):355-361.