干旱区生态环境知识资源中心(Arid): 基于零模型的宁夏荒漠草原优势种群点格局分析

Arid

	基于零模型的宁夏荒漠草原优势种群点格局分析
其他题名	Point pattern analysis of dominant populations based on null models in desert steppe in Ningxia
	许爱云; 许冬梅; 刘金龙; 于双; 黄葭悦; 米世明; 朱宁宁
来源期刊	生态学报
ISSN	1000-0933
出版年	2020
卷号	40 期号:12 页码:4180-4187
中文摘要	植物种群空间分布格局是多种生态过程综合作用的结果。明确植物优势种群个体的空间分布格局与形成机制有助于认识种群生态适应对策与群落多样性维持机制。以宁夏荒漠草原优势种群蒙古冰草、短花针茅、牛枝子和牛心朴子为研究对象,采用完全空间随机零模型分析其种群空间分布格局特征,并通过异质泊松零模型与泊松聚块零模型探讨生境异质性、扩散限制等因子在其空间分布格局形成过程中的作用。结果显示:(1)完全空间随机零模型下,4个物种在<4m尺度范围内表现为聚集分布,随尺度增大,逐渐过渡到随机分布和均匀分布。(2)在排除生境异质性的异质泊松零模型下,蒙古冰草种群在整个研究尺度上表现为随机分布;牛枝子、短花针茅和牛心朴子种群仅分别在00.2、0.10.4m与00.2m尺度范围内发生偏离,表现为均匀分布与聚集分布,其他尺度均为随机分布。(3)在排除扩散限制的泊松聚块零模型下,所研究种群均表现为随机分布。综上,荒漠草原优势种群在小尺度范围内主要表现为聚集分布;生境异质性与扩散限制均是驱动其空间分布格局形成的重要因子,相对而言,小尺度空间范围内扩散限制的作用更为显著。
英文摘要	The spatial distribution patterns of plant populations are the results of the combined effects of various ecological processes.Exploration of the spatial patterns and their driving mechanisms of plant populations is helpful in elucidating the ecological adaptation strategy of a population and maintenance mechanism of the community.To understand the spatial patterns and their formation mechanisms of the dominant species in desert steppes in Ningxia,four 10 m*10 m sample plots which dominated by Agropyron mongolicum,Stipa breviflora,Lespedeza potaninii,Cynanchum komarovii were established,respectively.The spatial coordinates of the dominant species were measured by using adjacent lattice method.Their spatial distribution patterns were analyzed based on complete spatial randomness null models,and their driving factors were explored based on heterogeneous poisson process null mode and poisson cluster process null model.The results showed that (1) when using complete spatial randomness null model,all populations presented the aggregated distribution at <4 m scales and random and uniform distributions at larger scales.(2) By using heterogeneous poisson process null model,the four dominant species mainly showed random distributions,but the S.breviflora,L.potaninii and C.komarovii departed from heterogeneous poisson process at much smaller scales.(3) The measured values of four species were accordance with poisson cluster process null model at the 05 m scale,appearing as random distribution.In conclusion,the four dominant populations mainly appeared as aggregated distribution.The spatial patterns of the dominant species were driven together by habitat heterogeneity and dispersal limitation in desert steppe in Ningxia.Relatively,the dispersal limitation played more significant roles at the small spatial scale.
中文关键词	荒漠草原 ; 零模型 ; 生境异质性 ; 扩散限制 ; 点格局分析
英文关键词	desert steppe null model environment heterogeneity dispersal limitation point pattern analysis
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6753209
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336644
作者单位	许爱云, 宁夏大学农学院, 银川, 宁夏 750021, 中国.; 刘金龙, 宁夏大学农学院, 银川, 宁夏 750021, 中国.; 于双, 宁夏大学农学院, 银川, 宁夏 750021, 中国.; 黄葭悦, 宁夏大学农学院, 银川, 宁夏 750021, 中国.; 米世明, 宁夏大学农学院, 银川, 宁夏 750021, 中国.; 朱宁宁, 宁夏大学农学院, 银川, 宁夏 750021, 中国.; 许冬梅, 宁夏大学农学院;;宁夏大学, ;;西北土地退化与生态恢复国家重点实验室培育基地, 银川;;银川, ;; 750021;;750021.
推荐引用方式 GB/T 7714	许爱云,许冬梅,刘金龙,等. 基于零模型的宁夏荒漠草原优势种群点格局分析[J]. 宁夏大学,2020,40(12):4180-4187.
APA	许爱云.,许冬梅.,刘金龙.,于双.,黄葭悦.,...&朱宁宁.(2020).基于零模型的宁夏荒漠草原优势种群点格局分析.生态学报,40(12),4180-4187.
MLA	许爱云,et al."基于零模型的宁夏荒漠草原优势种群点格局分析".生态学报 40.12(2020):4180-4187.