古尔班通古特沙漠南缘半固定沙丘固沙灌木株高-冠幅的空间异质性  

Spatial heterogeneity of plant height-crown width of sand-binding shrubs in semi-fixed dunes along the southern edge of the Gurbantünggüt Desert

作　　者：顾亭玉 张定海[1] 单立山[2] 张勃[3] Gu Ting-Yu;Zhang Ding-Hai;Shan Li-Shan;Zhang Bo(Center for Quantitative Biology,College of Science,Gansu Agricultural University,Lanzhou 730070,China;College of Forestry,Gansu Agricultural University,Lanzhou 730070,China;College of Prataculture,Gansu Agricultural University,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学理学院数量生物研究所,兰州730070 [2]甘肃农业大学林学院,兰州730070 [3]甘肃农业大学草业学院,兰州730070

出　　处：《植物科学学报》2023年第3期312-321,共10页Plant Science Journal

基　　金：甘肃省科技创新人才计划——“西部之光”人才计划项目(22JR9KA032);国家自然基金项目(41661022)。

摘　　要：本文在立地尺度上以古尔班通古特沙漠半固定沙丘上的4个优势固沙灌木种群为研究对象,利用变异函数分析其株高、东西和南北冠幅的各向同性和各向异性的空间变异特征。结果显示:(1)4个种群的株高和冠幅的大小顺序依次为白梭梭(Haloxylon persicum Bunge ex Boiss.et Buhse)、沙拐枣(Calligonum leucocladum(Schrenk)Bge.)、油蒿(Artemisia ordosica Krasch)、蛇麻黄(Ephedra distachya L.)。除蛇麻黄和油蒿无显著差异外,4个种群的株高和冠幅两两之间均有显著差异。(2)4个种群株高和冠幅的变异函数值随间距的增加变化趋势相同,在局部范围内存在一定的波动。(3)株高和冠幅具有较强的空间自相关格局。沙拐枣种群冠幅和蛇麻黄种群株高的空间变异主要由随机性和结构性因素共同决定,而其他种群株高和冠幅的空间变异则主要由结构性因素决定。(4)4个种群株高和冠幅的空间格局较为简单,不同方向上均呈现出空间异质性。In this study,four dominant sand-binding shrub populations in the semi-fixed dunes of the Gurbantünggüt Desert were used as research objects at the stand-scale.Isotropic and anisotropic spatial variation characteristics of plant height and crown width(east-west and north-south)were analyzed using variation function.Results showed that:(1)The plant height and crown width size of the four sand-fixing shrub populations followed the order Haloxylon persicum Bunge ex Boiss.et Buhse>Calligonum leucocladum(Schrenk)Bge.>Artemisia ordosica Krasch.>Ephedra distachya L..Significant differences in plant height and crown width were observed among the four populations,except for between E.distachya and A.ordosica.(2)The variation function values of plant height and crown width of the four populations exhibited the same trend with increasing spacing distance,with a certain fluctuation within the local range.(3)Plant height and crown width of most populations showed strong spatial autocorrelation patterns.Spatial variation in crown width of the C.leucocladum population and plant height of the E.distachya population were co-determined by random and structural factors.The spatial variation patterns of plant height and crown width of the other populations were mainly due to structural factors.(4)The spatial patterns of plant height and crown width of the four popula-tions were relatively simple,with spatial heterogeneity shown in different directions.

关 键 词：株高 冠幅 空间异质性 各向同性 各向异性 古尔班通古特沙漠 

分 类 号：Q948[生物学—植物学]