| 摘要: |
| 以科尔沁沙地半固定沙丘和流动沙丘两种不同沙丘上的盐蒿（Artemisia halodendron）种群为研究对象，采用空间点格局方法研究了0~20 m尺度上盐蒿种群的空间分布格局及其关联性。结果表明，半固定沙丘上盐蒿种群的数量远大于流动沙丘，不同生长发育阶段的种群结构呈偏正态分布，属于稳定型种群；流动沙丘上不同生长发育阶段的盐蒿种群结构呈反“J”字型，属于增长型种群。两种沙丘上的盐蒿种群和不同生长发育阶段个体都表现为聚集分布，随着尺度的增加，其聚集强度逐渐减弱，种群有向随机分布转变的趋势。半固定沙丘上不同生长发育阶段的盐蒿种群个体之间的正相关性较流动沙丘强。两种沙丘上幼株与营养株、幼株与生殖株、营养株与生殖株之间基本呈正相关关系，随着尺度的增加，其相关性逐渐减弱。研究结果对该地区盐蒿种群的保护利用以及未来该地区防风固沙措施的制定具有重要意义。 |
| 关键词: 科尔沁沙地 盐蒿种群 点格局分析 空间分布格局 空间关联性 |
| DOI：10.14188/j.ajsh.2022.01.008 |
| 分类号:Q948 |
| 基金项目:甘肃省科技计划项目（21JR7RA831）；国家自然科学基金（41661022）；甘肃农业大学盛彤笙创新基金（GAU-CX1121） |
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| Spatial distribution pattern and correlation of Artemisia halodendron population in Horqin Sandy Land， China |
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Li Su1, Zhang Dinghai1, Zhang Zhishan2, Huang Lei2
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1.Center for Quantitative Biology，College of Science，Gansu Agricultural University， Lanzhou 730070， Gansu， China;2.Shapotou Desert Research and Experimental Station，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences， Lanzhou 730000， Gansu， China
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| Abstract: |
| Artemisia halodendron population on semi-fixed and mobile sand dunes of Horqin Sandy Land was studied. The spatial distribution pattern and its correlation of Artemisia halodendron population at 0-20 m scale on two different types of sand dunes were analyzed by using spatial point pattern method. The results showed that the number of Artemisia halodendron on semi-fixed sand dune was much larger than that in mobile sand dune. The population structure in different growth and development stages on semi-fixed sand dunes showed biased normal distribution， belonging to stable population. The population structure at different growth and development stages on the mobile dunes showed an inverse "J" shape， belonging to the growth population. The Artemisia halodendron population and its individuals at different growth and development stages on the two different types of sand dunes showed an aggregation distribution. With the increase of the scale， the aggregation intensity gradually weakened， and the population tended to change to random distribution. The positive correlation between individuals at different growth and development stages in semi-fixed dunes was stronger than in mobile sand dunes. There were positive correlations between seedling and vegetative plants， seedling and reproductive plants， vegetative and reproductive plants on the two types of sand dunes， and the correlations were gradually weakened with the increase of scale. The results of this study are of great significance to the conservation and utilization of Artemisia halodendron population in this area， and also have great significance for the formulation of wind prevention and sand fixation in this area in the future. |
| Key words: Horqin Sandy Land Artemisia halodendron population point pattern analysis spatial distribution pattern spatial correlation |
