干旱区生态环境知识资源中心(Arid): 宁夏荒漠草原蒙古冰草(Agropyron mongolicum)种群小尺度空间分布及其关联性

Arid

	宁夏荒漠草原蒙古冰草(Agropyron mongolicum)种群小尺度空间分布及其关联性
其他题名	Fine-scale spatial distribution pattern and association of Agropyron mongolicum population in desert steppe in Ningxia
	许爱云 1; 刘金龙 1; 米世明 1; 朱宁宁 1; 于双 1; 许冬梅 2
来源期刊	生态学报
ISSN	1000-0933
出版年	2019
卷号	39 期号:12 页码:4551-4559
中文摘要	植物种群的空间分布格局及其关联性不仅反映种群的生态调控能力和环境可塑性机制,也是其在群落中地位与生存能力的外在表现.在宁夏盐池县,选择以蒙古冰草为优势种的荒漠草原为对象,按丛径将蒙古冰草个体划分I级株丛(05 cm)、Ⅱ级株丛(5.110 cm)、Ⅲ级株丛(10.115 cm)、Ⅳ级株丛(15.120 cm)和V级株丛(> 20 cm)5个株丛级,采用点格局分析中的O-ring函数统计方法,分析了蒙古冰草种群的株丛结构、各级株丛的空间分布格局及关联性.结果表明:(1)蒙古冰草种群中I、Ⅱ级株丛占比(79.24%)明显高于IV、V级株丛占比(8.46%),种群中可供更新的幼苗充足,种群表现出良好的发展趋势.(2)在小尺度范围内,蒙古冰草I、Ⅱ、Ⅲ级株丛主要表现为聚集分布,而且个体越小聚集程度越高,随尺度的增大,逐渐过渡到随机分布和均匀分布,IV、V级株丛在所有尺度上均为随机分布.(3)蒙古冰草种群I级株丛与Ⅱ、Ⅲ级株丛,Ⅱ级株丛与Ⅲ级株丛在小尺度内呈显著正关联,随研究尺度的增大趋于无关联,其余各级株丛在05 m尺度上主要呈无关联.
英文摘要	Agropyron mongolicum is the dominant species in desert steppe in Ningxia, China. With strong drought resistance, cold endurance, and wind and sand tolerance characteristics, A. mongolicum plays important roles in soil and water conservation, agricultural production, and ecological restoration. The spatial distribution pattern and association of plant population not only reflect the ecological regulation ability and environmental plasticity mechanism of a population, but also the external manifestation of their status and viability in the community. To clarify the spatial distribution pattern and association of A. mongolicum at different developmental stages,a desert steppe dominated by A. mongolicum in Yanchi, Ningxia was selected as the research object. The spatial coordinates and diameter of individual clusters of A. mongolicum were measured with a 10 m * 10 m sample plot. Five cluster degrees consisting of I degree cluster (05 cm),II degree cluster (5.1-10 cm), III degree cluster ( 10.1 15 cm), IV degree cluster ( 15.120 cm),and V degree cluster (>20 cm) were classified according to the individual cluster diameter. Based on the data from the sample plot, the spatial distribution pattern and association of A. mongolicum among different degree clusters were analyzed by adopting the method of point pattern analysis and O-ring function statistic. The results showed that the proportion of I and II degree clusters was significantly higher than that of IV and V degree clusters in A. mongolicum population, accounting for 79.24% of the total population. The population had adequate regenerative seedlings and exhibited good development trend. The I,II, and III degree clusters mainly aggregated in a small spatial scale,and the aggregation degree strengthened with the decrease in individuals. As the scale increased, the aggregation degree decreased and gradually transformed to random and uniform distribution. The IV and V degree clusters of A. mongolicum appeared as random distribution at all scales. The association between I and II degree clusters, I and III degree clusters,and II and III degree clusters of A. mongolicum showed significant positive relationship at a small scale, and tended to be unassociated with increase in scale. The remaining cluster levels showed no association at the 0-5 m scale.
中文关键词	蒙古冰草 ; 株丛结构 ; 空间分布格局 ; 空间关联性
英文关键词	Agropyron mongolicum bunch structure spatial distribution pattern spatial association
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6528865
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/2XILL650/239450
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, ;; 750021;;750021
推荐引用方式 GB/T 7714	许爱云,刘金龙,米世明,等. 宁夏荒漠草原蒙古冰草(Agropyron mongolicum)种群小尺度空间分布及其关联性[J]. 宁夏大学,2019,39(12):4551-4559.
APA	许爱云,刘金龙,米世明,朱宁宁,于双,&许冬梅.(2019).宁夏荒漠草原蒙古冰草(Agropyron mongolicum)种群小尺度空间分布及其关联性.生态学报,39(12),4551-4559.
MLA	许爱云,et al."宁夏荒漠草原蒙古冰草(Agropyron mongolicum)种群小尺度空间分布及其关联性".生态学报 39.12(2019):4551-4559.