Spatial Structure Characteristics of Sand-fixing Shrubs on Semi-fixed Dunes in Gurbantunggut Desert

doi:10.11733/j.issn.1007-0435.2024.07.020

Acta Agrestia Sinica ›› 2024, Vol. 32 ›› Issue (7): 2190-2204.DOI: 10.11733/j.issn.1007-0435.2024.07.020

Spatial Structure Characteristics of Sand-fixing Shrubs on Semi-fixed Dunes in Gurbantunggut Desert

WU Gai-yan¹, ZHANG Ding-hai¹, ZHANG Zhi-shan², SHAN Li-shan³

1. Institute of Quantitative Biology, College of Science, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
2. Shapotou Desert Research and Experimental Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu Province 730000, China;
3. College of Forestry, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China

Received:2023-12-03 Revised:2024-01-26 Published:2024-08-03

古尔班通古特沙漠半固定沙丘上固沙灌木的空间结构特征研究

吴改艳¹, 张定海¹, 张志山², 单立山³

1. 甘肃农业大学理学院数量生物研究所, 甘肃兰州 730070;
2. 中国科学院西北生态环境资源研究院, 沙坡头沙漠研究试验站, 甘肃兰州 730000;
3. 甘肃农业大学林学院, 甘肃兰州 730070

通讯作者: 张定海，E-mail:zhangdh@gsau.edu.cn
作者简介:吴改艳(1998-)，女，汉族，甘肃天水人，硕士研究生，主要从事空间统计研究，E-mail:2494675841@qq.com
基金资助:
国家自然科学基金项目(42361016)；甘肃省科技创新计划–“西部之光”人才计划项目(22 JR9KA032)；甘肃省科技计划项目(21 JR7RA831)资助

Abstract

Abstract: In order to clarify the internal and external characteristics of spatial structure changes of sand-fixing shrub populations and the survival mechanism of species,in this study,four dominant sand-fixing shrubs (Haloxylon persicum,Calligonum leucocladum,Ephedra distachya and Artemisia ordosica) were selected from semi-fixed sand dunes in Gurbantunggut Desert.The spatial structure characteristics of the whole population and the populations at different growth stages (young,nutritive and reproductive plants) were studied basing on the univariate and binary distribution of the spatial structure parameters (uniform angle index,mingling and dominance) of the nearest neighbor trees. The results showed that the plant height and crown width of Haloxylon persicum and Calligonum leucocladum at different growth stages were higher than Ephedra distachya and Artemisia ordosica. The populations of Haloxylon persicum,Calligonum leucocladum and Artemisia ordosica showed random distribution,and the aggregation degree of the populations of Ephedra distachya was relatively high;The young plants of four populations showed complete mixed state;The dominance of the growth state of the populations of Haloxylon persicum and Calligonum leucocladum at different growth stages was always higher than the populations of Ephedra distachya and Artemisia ordosica. The growth trend of binary distribution of the four populations at different growth stages was basically consistent. The results of this study are of great significance for revealing the growth rules of sand-fixing shrubs,biodiversity and changes in ecosystem functions and processes.

Key words: Sand-fixing shrub, Spatial structure, The uniform angle index, Mingling, Dominance

摘要： 为明确固沙灌木种群空间结构变化的内外部特征和物种的生存机制，本研究以古尔班通古特沙漠半固定沙丘上的4种优势固沙灌木(白梭梭(Haloxylon persicum)、沙拐枣(Calligonum leucocladum)、蛇麻黄(Ephedra distachya)和油蒿(Artemisia ordosica))种群为研究对象，基于最近邻木空间结构参数(角尺度、混交度和大小比数)的一元和二元分布研究种群整体和不同生长阶段(幼株、营养株和生殖株)的种群的空间结构特征。结果表明：白梭梭和沙拐枣种群的株高和冠幅在不同生长阶段均高于蛇麻黄和油蒿种群；白梭梭、沙拐枣和油蒿种群呈随机分布，蛇麻黄种群的聚集程度相对较高；4个种群幼株表现出完全混交的状态；白梭梭和沙拐枣种群的生长状态优势度始终高于蛇麻黄和油蒿种群；4个种群的二元分布生长态势基本保持一致。研究结果对揭示固沙灌木的生长规律、生物多样性以及生态系统功能和过程的变化具有重要意义。

关键词: 固沙灌木, 空间结构, 角尺度, 混交度, 大小比数

CLC Number:

Q948

WU Gai-yan, ZHANG Ding-hai, ZHANG Zhi-shan, SHAN Li-shan. Spatial Structure Characteristics of Sand-fixing Shrubs on Semi-fixed Dunes in Gurbantunggut Desert[J]. Acta Agrestia Sinica, 2024, 32(7): 2190-2204.

吴改艳, 张定海, 张志山, 单立山. 古尔班通古特沙漠半固定沙丘上固沙灌木的空间结构特征研究[J]. 草地学报, 2024, 32(7): 2190-2204.

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Spatial Structure Characteristics of Sand-fixing Shrubs on Semi-fixed Dunes in Gurbantunggut Desert

古尔班通古特沙漠半固定沙丘上固沙灌木的空间结构特征研究

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