干旱区生态环境知识资源中心(Arid): 祁连山东段干旱草原2种群落物种构成及稳定性研究

Arid

	祁连山东段干旱草原2种群落物种构成及稳定性研究
其他题名	Research on the Vegetation Composition and Community Stability of Arid Grassland in the East of Qilian Mountains
	赵敏; 徐文兵; 孔杨云; 王先之; 于应文
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2017
卷号	37 期号:9 页码:1847-1853
中文摘要	芨芨草作为干旱、半干旱草原建群种,其群落植被构成和稳定性影响草原荒漠化程度,研究其群落物种构成及稳定性,可表征草原演替动态和发展方向。该研究以甘肃天祝松山滩干旱草原芨芨草群落和针茅群落为对象,定量分析其群落物种组成和多样性、功能群生物量构成、Raunkiaer频度和种间Spearman秩相关,探究物种构成和种间关联与群落稳定性的关系。结果表明:(1)针茅群落物种多样性较芨芨草群落丰富,其物种更替程度相近。(2)2个群落均处于退化状态,随退化程度加剧,丛生禾草和杂类草分别占据芨芨草群落和针茅群落主要地位。(3)2个群落主要植物种对的正负关联比皆小于1,其植物种间联结性松散,群落稳定性较低。(4)高物种多样性不利于针茅群落稳定。研究认为,群落功能群构成及其均匀度和干旱扰动比多样性对群落稳定性影响更大。
英文摘要	Achnatherum splendens is a constructive species in arid or semi-arid grassland,vegetation composition and community stability of its community can affect the desertification degree of grassland,which represents successional dynamics and development direction of community.The aims of this study is to explore the relationship between vegetation composition,interspecific association and community stability by analyzing the composition,and diversity of species,functional group biomass composition,Raunkiaer frequency coefficient,and Spearman rank correlation of A.splendens and Stipacommunities in Songshantan grassland in Gansu Tianzhu.The results indicated that,(1)the species diversity of Stipacommunity was richer than that of A.splendens community,and the degree of species replacement was similar in these two communities.(2)The two communities were degraded,with the grassland degradation increased,A. splendens and Stipacommunities dominated by grasses and forbs,respectively.(3)The positive to negative association ratio of species-pairs in two communities was less than one,and the interspecific association was loose,and they had a low community stability.(4)The high species diversity was not benefit for the stability of Stipacommunity.The study suggests that biomass composition of functional group,evenness of species and drought disturbance had higher effects on the community stability than that of the species diversity.
中文关键词	芨芨草群落 ; 针茅群落 ; 物种多样性 ; 功能群 ; Raunkiaer频度系数 ; Spearman秩相关
英文关键词	Achnatherum splendens community Stipacommunity diversity functional group Raunkiaer frequency coefficient Spearman rank correlation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6089312
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236825
作者单位	兰州大学草地农业科技学院, 兰州, 甘肃 730020, 中国
推荐引用方式 GB/T 7714	赵敏,徐文兵,孔杨云,等. 祁连山东段干旱草原2种群落物种构成及稳定性研究[J]. 兰州大学,2017,37(9):1847-1853.
APA	赵敏,徐文兵,孔杨云,王先之,&于应文.(2017).祁连山东段干旱草原2种群落物种构成及稳定性研究.西北植物学报,37(9),1847-1853.
MLA	赵敏,et al."祁连山东段干旱草原2种群落物种构成及稳定性研究".西北植物学报 37.9(2017):1847-1853.