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	巴丹吉林沙漠东缘天然梭梭种群空间分布异质性
其他题名	Spatial heterogeneity of natural Haloxylon ammodendron Populations at Ta-Mu-Su,Badain Jaran Desert,China
	王猛 1; 汪季 1; 蒙仲举 1; 柴享贤 1; 吕世杰 2; 王德慧 3; 乌云嘎 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2016
卷号	36 期号:13 页码:4055-4063
中文摘要	梭梭(Haloxylon ammodendron(C. A. Mey.)Bunge)是生长于沙漠地区的一种特有灌木,在维持荒漠生态系统平衡和地区经济发展中发挥着不可替代的作用。为掌握天然梭梭种群空间分布规律,以巴丹吉林沙漠东缘塔木素地区的野生肉苁蓉及梭梭产籽基地为试验区,采用样线法测定梭梭株高、冠幅直径,统计梭梭分布密度,分析梭梭种群数量特征空间分布特征及其与生境之间的关系。结果表明: 梭梭林密度、株高、冠幅直径均符合正态分布,表现为强度变异; 株高、密度、冠幅直径的半方差函数理论模型均为高斯理论模型,其相应的变程为1249、909、1035 m; 空间自相关比例均超过70%,受随机因素影响较小,保持着较好的天然分布和生长状态。梭梭种群数量特征的分形维数均大于1.5,空间依赖性强,空间结构性好。长期风蚀作用,小地形海拔高度体现为不同沙层厚度,梭梭株高、冠幅直径和密度在空间上的分布呈西高东低,北高南低的趋势,与海拔高度存在极显著相关; 梭梭群落的空间异质性表现出一定的适度沙埋效应。
英文摘要	The Badain Jaran Desert,located in a temperate arid region,is characterized by some of the tallest stationary dunes on Earth. Often,these dunes support the growth of unique vegetation species,such as Haloxylon ammodendron ( C. A. Mey.) Bunge. Haloxylon ammodendron,a shrub indigenous to the area,is of high socio-ecological importance and has the following functions: desertification control,improving soil quality in degraded areas,and supporting local economic development. Although the socio - ecological importance of Haloxylon ammodendron is well-understood,very few studies have addressed the spatial heterogeneity in the soil and vegetation at different scales in this landscape and its role in desertification dynamics. We conducted extensive replicated field experiments in Ta-Mu-Su at the east edge of the Badain Jaran Desert in order to examine the spatial distribution of Haloxylon ammodendron and the relationship between quantitative plant characteristics and altitude. We hypothesized that the spatial heterogeneity in the soil and vegetation in this landscape could be used as an indicator for desertification. We designed experimental plots ( area,192 hm~2 ) with natural Haloxylon ammodendron shrubs as the dominant vegetation type. We investigated the relationship between the spatial heterogeneity of shrub distribution and thickness of sand deposition. We measured plant growth indicators such as plant density,height,and crown diameter. We measured plant growth parameters during the growing season ( months) by using the line transect method,recorded plant coordinates,and monitored plant growth parameters along the transect line. The collected data were integrated into a global positioning system simultaneously,and statistical methods were used to analyze the spatial distribution and heterogeneity of natural vegetation. Our results suggest a normal distribution in plant height,crown diameter,and density with corresponding coefficients of 43.8%,36.4%,and 36.38%,respectively,indicating an intensive spatial variation in plant growth parameters. The semi-variance optimal function of population characteristics and altitude plots was Gaussian; the semi-variance functions of height,crown diameter,and density were 1249 m,909 m,and 1035 m, respectively; and spatial variation in crown diameter was significant with the highest C0+ C caused by random factors,where C0 is the nugget or variability not explained by distance and C is the spatial heterogeneity caused by autocorrelation factors. Spatial heterogeneity of the plant characteristics was autocorrelated with a structure ratio,C/( C0+ C) ,of more than 70%. The large structure ratio suggests that Haloxylon ammodendron maintains a natural distribution with few disturbances. The fractal dimension was greater than 1.5,which suggests that the spatial structure of Haloxylon ammodendron was simple with strong spatial dependence. Significant positive correlation was observed between plant height and crown diameter ( 0.8771) . Accelerated wind erosion resulted in decreased sand thickness along the prevailing wind direction ( west-east and northsouth) across the spatial domain. Plant height,crown diameter,and density also decreased along the direction of the prevailing winds. Overall,the spatial heterogeneity observed in our study suggests that sand deposition favors the growth and development of Haloxylon ammodendron.
中文关键词	巴丹吉林沙漠 ; 塔木素 ; 天然梭梭林 ; 空间异质性 ; 沙层厚度 ; 适度沙埋
英文关键词	Badain Jaran Desert Ta-Mu-Su natural Haloxylon ammodendron shrub spatial heterogeneity sand thickness moderate sand burial
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:5748726
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234795
作者单位	1.内蒙古农业大学生态环境学院, 呼和浩特, 内蒙古 010018, 中国; 2.内蒙古农业大学理学院, 呼和浩特, 内蒙古 010018, 中国; 3.内蒙古农业大学农学院, 呼和浩特, 内蒙古 010018, 中国
推荐引用方式 GB/T 7714	王猛,汪季,蒙仲举,等. 巴丹吉林沙漠东缘天然梭梭种群空间分布异质性[J]. 内蒙古农业大学,2016,36(13):4055-4063.
APA	王猛.,汪季.,蒙仲举.,柴享贤.,吕世杰.,...&乌云嘎.(2016).巴丹吉林沙漠东缘天然梭梭种群空间分布异质性.生态学报,36(13),4055-4063.
MLA	王猛,et al."巴丹吉林沙漠东缘天然梭梭种群空间分布异质性".生态学报 36.13(2016):4055-4063.