干旱区生态环境知识资源中心(Arid): 宁夏荒漠草原不同群落蒙古冰草种群空间格局及种间关联性

Arid

	宁夏荒漠草原不同群落蒙古冰草种群空间格局及种间关联性
其他题名	Spatial distribution patterns and interspecific relationships of Agropyron mongolicum populations in different desert steppe communities in Ningxia
	许爱云 1; 许冬梅 2; 曹兵 1; 刘金龙 1; 于双 1; 郭艳菊 1; 马晓静 1
来源期刊	草业学报
ISSN	1004-5759
出版年	2020
卷号	29 期号:3 页码:171-178
中文摘要	为探讨蒙古冰草种群对环境的适应对策,以宁夏盐池县荒漠草原短花针茅+蒙古冰草群落、蒙古冰草+牛枝子群落、蒙古冰草+牛心朴子群落为研究对象,采用点格局分析中的O-ring函数统计方法,分析了不同群落中蒙古冰草种群的数量特征、分布类型及优势种群的种间关联性。结果表明:不同群落生境条件下,蒙古冰草+牛枝子群落中蒙古冰草种群的密度、盖度和地上生物量显著高于短花针茅+蒙古冰草群落和蒙古冰草+牛心朴子群落(P< 0.05),3个群落之间蒙古冰草种群的高度差异不显著(P<0.05)。不同群落生境蒙古冰草种群在<4m尺度范围内主要表现为聚集分布,随尺度增大,聚集强度减弱,逐渐过渡到随机分布和均匀分布。蒙古冰草种群与短花针茅种群、蒙古冰草种群与牛枝子种群在小于4m尺度上呈显著负关联,随尺度的增大趋于无关联;蒙古冰草种群与牛心朴子种群在整个研究尺度上无关联。
英文摘要	Population characteristics and interspecies relationships are important in the study of population ecology.To investigate the environmental plasticity mechanisms of Agropyron mongolicum populations,three 10 m*10mplots dominated by communities of Stipa breviflora+A.mongolicum,A.mongolicum+Lespedeza potaninii and A.mongolicum+Cynanchum komarovii were studied in desert steppe grassland in Yanchi County.The spatial coordinates and quantitative characteristics,including height and above ground biomass of A.mongolicum were measured in the study plots.The spatial distribution pattern of the A.mongolicum populations and the interspecific relationships between the A.mongolicum populations and other dominant species in the studied plant communities were analyzed bypoint pattern analysis'andO-ring function statistic'methods.It was found that the density,ground cover and above-ground biomass of A.mongolicum populations in A.mongolicum+L.potaninii communities were significantly higher than those in S.breviflora+A.mongolicum and A.mongolicum+C.komarovii communities(P<0.05),and the height did not differ significantly among the three communities(P<0.05).The spatial pattern of A.mongolicum populations mainly displayed an aggregated distribution,with an aggregation scale of less than 4m.When spatial distribution was evaluated at larger scale,the aggregation degree decreased with increasing scale and gradually transformed to random and uniform distribution.The associations between A.mongolicumand S.breviflora populations,and A.mongolicum and L.potaninii populations showed a negative relationship at a scale of less than 4mand tended to show no association with increase in the evaluation scale.No association between A.mongolicum and C.komarovii populations was detected at the 0-5mevaluation scale.
中文关键词	荒漠草原 ; 蒙古冰草 ; 空间分布类型 ; 种间关联性 ; 点格局分析
英文关键词	desert steppe Agropyron mongolicum spatial distribution pattern interspecific relationship point pattern analysis
语种	中文
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6666799
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/2XILL650/315954
作者单位	1.宁夏大学农学院, 银川, 宁夏 750021, 中国; 2.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, 宁夏;;宁夏 750021;;750021, 中国
推荐引用方式 GB/T 7714	许爱云,许冬梅,曹兵,等. 宁夏荒漠草原不同群落蒙古冰草种群空间格局及种间关联性[J]. 宁夏大学,2020,29(3):171-178.
APA	许爱云.,许冬梅.,曹兵.,刘金龙.,于双.,...&马晓静.(2020).宁夏荒漠草原不同群落蒙古冰草种群空间格局及种间关联性.草业学报,29(3),171-178.
MLA	许爱云,et al."宁夏荒漠草原不同群落蒙古冰草种群空间格局及种间关联性".草业学报 29.3(2020):171-178.