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草业学报 ›› 2026, Vol. 35 ›› Issue (10): 79-90.DOI: 10.11686/cyxb2025422

• 研究论文 • 上一篇    下一篇

毛乌素沙地黑沙蒿种群点格局及其与小叶锦鸡儿的空间关联性研究

张蕊(), 王铁娟(), 张冰冰, 冯婧, 邵金玲   

  1. 内蒙古师范大学生命科学与技术学院,内蒙古自治区高等学校蒙古高原生物多样性保护与可持续利用重点实验室,内蒙古 呼和浩特 010022
  • 收稿日期:2025-10-18 修回日期:2025-11-24 出版日期:2026-10-20 发布日期:2026-09-09
  • 通讯作者: 王铁娟
  • 作者简介:E-mail:wtj105@163.com
    张蕊(2001-),女,吉林松原人,在读硕士。E-mail:1753086963@qq.com
  • 基金资助:
    内蒙古自治区科技计划项目(2020GG0124);内蒙古师范大学自主科研项目(KJJYZX2026087)

A study of the point occurrence pattern of Artemisia ordosica populations and their spatial correlation with Caragana microphylla occurrence in the Mu Us sandy land

Rui ZHANG(), Tie-juan WANG(), Bing-bing ZHANG, Jing FENG, Jin-ling SHAO   

  1. College of Life Science and Technology,Inner Mongolia Normal University,Key Laboratory of Biodiversity Conservation and Sustainable Utilization in Mongolian Plateau for College and University of Inner Mongolia Autonomous Region,Hohhot 010022,China
  • Received:2025-10-18 Revised:2025-11-24 Online:2026-10-20 Published:2026-09-09
  • Contact: Tie-juan WANG

摘要:

黑沙蒿是我国特有的优良固沙植物,也是沙生植物群落重要的建群种。研究沙地固定过程中黑沙蒿的种群分布格局及其变化规律,以及与固沙植物小叶锦鸡儿的关系,对于认识其种群动态和种群分布格局的影响机制具有重要意义。本研究在毛乌素沙地的半固定和固定沙地中选择与小叶锦鸡儿共存的黑沙蒿群落,基于点格局的完全随机模型(CSR)、异质泊松模型(HP)、前提条件模型(AC)、环形转换模型(TS)以20 m的尺度研究黑沙蒿的种群空间分布格局、3个大小级的空间关联性以及与小叶锦鸡儿相互作用的关系。结果表明:黑沙蒿种群的年龄结构在半固定沙地为增长型,在固定沙地为稳定向衰退的过渡阶段。完全随机模型结果显示,黑沙蒿种群及其3个大小级以及小叶锦鸡儿种群在小尺度或小至中尺度上呈现聚集分布,且随着沙地的固定,聚集程度加大;剔除生境异质性后的异质泊松模型结果显示聚集性有不同程度的下降,半固定沙地种群更为明显。前提条件模型下,黑沙蒿Ⅰ与Ⅱ级、Ⅱ与Ⅲ级植株存在不同程度的正关联,且在固定沙地中正关联性更强,而Ⅰ与Ⅲ级植株在两种沙地中均没有关联性。随着尺度的增大,尤其是大于16 m,黑沙蒿与小叶锦鸡儿多呈现出随机分布和均匀分布(HP模型),黑沙蒿各大小级间多呈现出无关联性,反映了个体间的相互作用下降。随着沙地的固定,两种植物的个体数量和密度明显增加,环形转换模型结果显示,种间呈现出由半固定沙地的小尺度(0~1.0 m)至固定沙地的中小尺度(0~7.8 m)上的负关联,表明黑沙蒿与小叶锦鸡儿的竞争明显增强。研究结果可为沙地治理过程中物种的选择与搭配种植方式提供参考。

关键词: 黑沙蒿, 小叶锦鸡儿, 空间分布格局, 空间关联性, 零模型

Abstract:

Artemisia ordosica, is a valuable sand-fixing plant in China and is also important as a dominant species in the sand plant community. This research investigated the population distribution pattern of A. ordosica during the process of sand fixation and the dynamics of population change, as well as the relationship with the sand-fixing plant Caragana microphylla, in order to understand the mechanisms of population dynamics and the factors influencing the distribution pattern. In this study, A. ordosica communities coexisting with C. microphylla were selected from semi-fixed and fixed sandy land in within the Mu Us sandy land. Based on the complete spatial randomness model (CSR), heterogeneous poisson model (HP), antecedent condition model (AC) and toroidal shift model (TS) of point pattern, the spatial distribution pattern of A. ordosica populations, the spatial correlation of three size classes (Ⅰ, d≤25 cm;Ⅱ, 25 cm<d≤75 cm;Ⅲ, d>75 cm) and the interaction with C. microphylla were studied at a scale of 20 m. It was found that the age structure of A. ordosica populations was a ‘growth’ type in semi-fixed sandy land while the population exhibited a transition stage from stability to decline in fixed sandy land. According to the CSR model, both the A. ordosica populations (including all three size classes) and the C. microphylla populations exhibited an aggregated distribution at small scales or small to medium scales, and the degree of aggregation increased with the degree of sand fixation. The results of the HP model after eliminating habitat heterogeneity showed that the aggregation decreased to varying degrees, and the semi-fixed sand population was more obvious. According to the AC model, there were different degrees of positive correlations between class I and Ⅱ, and class Ⅱ and Ⅲ individuals of A. ordosica, and the positive correlation was stronger in fixed sandy land, while class Ⅰ and class Ⅲ plants showed no correlation in both types of sandy land. With increasing scale, especially at scales greater than 16 m, A. ordosica and C. microphylla mostly showed random distribution and uniform distribution (HP model), and A. ordosica mostly showed no correlation between different size classes, reflecting a decrease in interaction between individuals. With the fixation of sandy land, the number of individuals and density of the two plant species increased significantly. The results of the TS model showed that the interspecific association showed a negative correlation from the small scale (0-1.0 m) of the semi-fixed sandy land to the small and medium scale (0-7.8 m) of the fixed sandy land, indicating that the competition between A. ordosica and C. microphylla was significantly enhanced. The research results provide reference data for the selection of species and the combination of planting methods in sandy land management.

Key words: Artemisia ordosica, Caragana microphylla, spatial distribution pattern, spatial association, null model