阿拉善高原红砂(Reaumuria songarica)种群空间分布格局

doi:10.7522/j.issn.1000-694X.2019.00035

摘要/Abstract

摘要： 为揭示阿拉善高原红砂（Reaumuria songarica）种群扩散、生长特征和空间分布规律，采用大小结构分析法和Ripley's K函数对湿润梯度下的红砂种群结构、空间分布格局及各龄级间空间关联性进行了研究。结果表明：红砂种群结构以稳定型为主，其次是衰退型，幼龄植株极少，种群更新受限；随气候湿润度的降低，红砂种群及各龄级空间分布格局由多样化向单一形式转变，即聚集分布向随机分布或均匀分布类型变为主要呈随机分布类型，在较湿润地区，各龄级间的空间关联性相对复杂，总体上随尺度的增大表现正关联→无关联→负关联，在较干旱地区，大体上表现为无关联。红砂是阿拉善高原的主要建群种，在生态恢复的过程中应遵循自然生长和分布规律，通过最优化的人工抚育和保护提高植株成活率和繁殖率，充分发挥红砂种群防风固沙的能力。

关键词: 阿拉善高原, 红砂(Reaumuria songarica), 空间分布格局

Abstract: In order to reveal the population spread, growth characteristics and spatial distribution law of Reaumuria songarica in Alashan Plateau, the size structure analysis method and Ripley's K function were used to study the population structure, spatial distribution pattern and spatial correlation of R.songarica various under different wetness gradients. The results showed that the population of R.songarica was dominated by stable population, followed by declining population. The young plants were rare and the population renewal was limited. With the decrease of climate humidity, the spatial distribution pattern of R.songarica population and age class changes from diversification to single form, that is, the aggregation distribution changes to a random distribution or a uniform distribution type to a predominantly random distribution type. In the humid regions, the spatial correlation between the age classes is relatively complex. Generally speaking, with the increase of scale, it is characterized by "positive association→no correlation→negative correlation". In the more arid regions, there is generally no correlation. R.songarica is one of the most important species in the Alashan Plateau. In the process of ecological restoration, it should follow the laws of natural growth and distribution, improving the survival rate and reproduction rate of plants through optimized artificial tending and protection, and give full play to the ability of R.songarica population to prevent wind and sand.

Key words: Alashan Plateau, Reaumuria songarica population, spatial distribution pattern

中图分类号:

Q948.15

孙艳霞, 杨九艳, 乔宜青, 郭超莉, 邵奕铭, 王健宇. 阿拉善高原红砂(Reaumuria songarica)种群空间分布格局[J]. 中国沙漠, 2020, 40(1): 105-115.

Sun Yanxia, Yang Jiuyan, Qiao Yiqing, Guo Chaoli, Shao Yiming, Wang Jianyu. Spatial distribution pattern of Reaumuria songarica population in Alashan Plateau[J]. Journal of Desert Research, 2020, 40(1): 105-115.

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