干旱区生态环境知识资源中心(Arid): 祁连山北坡植物群落空间分布格局与多样性研究

Arid

	祁连山北坡植物群落空间分布格局与多样性研究
其他题名	Distribution characteristics and plant community diversity on the north slopes of the Qilian Mountains
	贺国宝
来源期刊	草业学报
ISSN	1004-5759
出版年	2021
卷号	30 期号:12 页码:194-201
中文摘要	干旱区山地植物群落的空间分布格局和多样性特征对海拔梯度的响应分析,有助于探究山地植物的生态适应性策略。采用TWINSPAN和DCA排序等方法,研究了祁连山北坡植物群落分布格局和多样性特征。结果表明:祁连山北坡植物群落可以分为9个类群,随着海拔的升高,植被类型由荒漠-荒漠草原-典型草原逐渐转变为草甸草原,植物群落由斑块状分布的盐爪爪+珍珠群丛至灌木亚菊+珍珠群丛和合头草+珍珠群丛过渡为甘蒙锦鸡儿+芨芨草群丛、扁穗冰草+西北针茅群丛和西北针茅+赖草群丛,最后逐渐演化为呈镶嵌分布的鬼箭锦鸡儿+高山柳群丛和苔草+嵩草群丛;草地群落的Shannon-Wiener多样性指数(H')和物种丰富度指数(R)呈双峰变化趋势,Pielou均匀度指数(J)在中海拔有最大值,而Simpson优势度指数(C)在中海拔有最小值。祁连山植被类型由低海拔荒漠至高海拔草甸草原演化过程中伴随着植物群落分布格局和种类组成的改变,体现了山地环境对植物群落构建的过滤作用。
英文摘要	The analysis of the spatial distribution patterns and diversity characteristics of mountain plant communities in arid areas in response to an elevation gradient is helpful to explore the ecological adaptation strategies of mountain plants. TWINSPAN and DCA sequencing methods were used to study the distribution pattern and diversity of alpine grassland vegetation community on the north slope of Qilian Mountains. It was found that the alpine grassland vegetation in the Qilian Mountains could be divided into 9 categories,and with increasing elevation,the vegetation type changed from desert to desert steppe and then to typical steppe. Finally,there was a gradual transition to a meadow grassland. The key plant species associations in the elevational succession of vegetation categories were:a patchy distribution of associated Kalidium foliatum+Phyllanthus urinaria, transitioning to associated Ajania fruticulosa+P. urinaria,then associated Sympegma regelii+P. urinaria,an association of Caragana opulens+ Achnatherum splendens,an association of Agropyron cristatum+Stipa sareptana,an association of S. sareptana+ Leymus secalinus,gradually evolving into a Caragana jubata+Salix cupularis association,and eventually a Carex tristachya+Kobresia myosuroides association with mosaic distribution. The Shannon-Wiener diversity indexes (H') and species richness indexes (R) of grassland communities generally showeddouble peaks';the Pielou evenness index(J)had highest values at mid altitudes,while the Simpson dominance index(C)had lowest values at mid altitudes. In summary,the vegetation types of the Qilian Mountains exhibited an elevational succession from low-altitude desert to high-altitude meadow grassland with associated changes in plant community distribution patterns and species composition, which reflected the filtering effect of the mountain environment on plant community construction.
中文关键词	物种多样性 ; 祁连山 ; 植物群落组成 ; 海拔
英文关键词	TWINSPAN species diversity Qilian Mountain plant community composition elevation TWINSPAN
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:7115316
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377534
作者单位	贺国宝, 甘肃省肃南县草原工作站, 肃南, 甘肃 734400, 中国.
推荐引用方式 GB/T 7714	贺国宝. 祁连山北坡植物群落空间分布格局与多样性研究[J],2021,30(12):194-201.
APA	贺国宝.(2021).祁连山北坡植物群落空间分布格局与多样性研究.草业学报,30(12),194-201.
MLA	贺国宝."祁连山北坡植物群落空间分布格局与多样性研究".草业学报 30.12(2021):194-201.

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