干旱区生态环境知识资源中心(Arid): 荒漠植物红砂与西北针茅种群的空间格局及其关联性

Arid

	荒漠植物红砂与西北针茅种群的空间格局及其关联性
其他题名	Spatial Distribution Pattern and Association between Desert Plant of Reaumuria songarica and Stipa sareptana var.krylovii Population
	夏素娟 1; 刘旻霞 1; 朱恭 2; 南笑宁 1; 李全弟 1; 蒋晓轩 1
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2018
卷号	38 期号:11 页码:2129-2137
中文摘要	植物种群的空间分布格局及关联性是研究种群扩散、群落演替及生物与环境因子相互作用的重要手段。该研究以甘肃省皋兰县老虎台干旱荒漠区的主要物种红砂(Reaumuria songarica)和西北针茅(Stipa sareptana var.krylovii)为对象,采用Ripley K函数分析了不同坡向红砂和西北针茅种群的点格局特征及其关联性,以揭示干旱荒漠区植物演替过程中优势种群之间的竞争关系和生存繁衍策略。结果表明:(1)红砂和西北针茅在4个坡向上的分布格局具有显著差异性,随着坡向由西北坡向南坡的转变,红砂种群的株数、盖度及重要值先增加后降低,西北针茅种群则不断增加;西北坡向上,红砂种群的空间格局在0~2.1 m尺度上呈聚集分布,随着尺度的增加聚集强度减弱并趋向于随机分布,而西北针茅种群在整个尺度内均呈聚集分布;西坡坡向上,在整个研究尺度内,红砂种群表现为随机分布,而西北针茅种群表现为聚集分布;西南坡向上,红砂种群在0~3.7 m尺度上表现为聚集分布,3.7~5 m的尺度上表现为随机分布,西北针茅种群在0~1 m及4.2~5 m尺度上表现为随机分布,1~ 4.2 m尺度上表现为聚集分布;南坡坡向上,在整个研究尺度内,红砂种群表现为聚集分布,西北针茅种群表现为随机分布。(2)在西北坡与西坡坡向上,红砂和西北针茅种群的空间关联性在小尺度上均表现为负相关关系,随着研究尺度的增大,种间关联度均趋向于不相关;在西南坡与南坡坡向上,两物种在整个尺度范围内均表现为无关联性。
英文摘要	The spatial distribution and correlation of population is an important means to study population diffusion,community succession and the interaction between biological and environmental factors.The study takes Reaumuria songarica and Stipa sareptana var.krylovii as the main species in Laohutai arid desert area of Gaolan County,Gansu Province.The spatial distribution characteristics and their association of R.songaricaand S.sareptanavar.krylovii on different slopes were analyzed by using Ripley’s k function,revealing the competitive relationship,survival,and reproduction strategies among dominant populations in the process of plant succession in arid desert areas.The results showed that:(1)there were significant differences in the distribution of R.songaricaand S.sareptana var.krylovii in the four slopes. With the change of slope aspect from northwest to south,the plant number,coverage and important value of R.songaricapopulation increased first and then decreased,while the population of S.sareptana var. krylovii increased continuously.In the northwest slope,the R.songaricapopulation showed aggregation distribution on the scale of 0-2.1 m,with the increase of the scale,the aggregation intensity weakened and tended to random distribution,and the population of S.sareptanavar.krylovii was mainly aggregation distribution;In the west slope,the R.songaricapopulation showed random distribution on the whole scale,and the S.sareptana var.krylovii population showed aggregate distribution;In the southwest slope,the population of R.songaricashowed aggregation distribution on the scale of 0-3.7 mand random distribution on the scale of 3.7-5 m,the S.sareptana var.krylovii population showed a random distribution on the scale of 0-1 mand 4.2-5 m,an aggregate distribution on the scale of 1-4.2 m;In the south slope,the R.songaricapopulation showed aggregate distribution on the whole scale,and the S. sareptana var.krylovii population showed random distribution.(2)In the northwest slope and west slope,the R.songaricaand the S.sareptanavar.krylovii showed negative correlation on the small scale, with the increase of the scale,the interspecific correlation of the species tended to be unrelated;In the southwestern and southern slopes,the two species showed no correlation in the whole scale.
中文关键词	红砂 ; 西北针茅 ; 空间分布格局 ; 坡向
英文关键词	Reaumuria songarica Stipa sareptana var.krylovii spatial distribution pattern slope aspect
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:6390804
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238500
作者单位	1.西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国; 2.兰州市南北两山环境绿化工程指挥部, 兰州, 甘肃 730046, 中国
推荐引用方式 GB/T 7714	夏素娟,刘旻霞,朱恭,等. 荒漠植物红砂与西北针茅种群的空间格局及其关联性[J]. 西北师范大学,2018,38(11):2129-2137.
APA	夏素娟,刘旻霞,朱恭,南笑宁,李全弟,&蒋晓轩.(2018).荒漠植物红砂与西北针茅种群的空间格局及其关联性.西北植物学报,38(11),2129-2137.
MLA	夏素娟,et al."荒漠植物红砂与西北针茅种群的空间格局及其关联性".西北植物学报 38.11(2018):2129-2137.