草原化荒漠地区红砂+珍珠猪毛菜群落空间分布特征及其与环境因子间的关系
Spatial distribution patterns of Reaumuria songarica +Salsola passerina communities and its relationship with environmental factors in steppified desert area
投稿时间:2023-06-27  修订日期:2024-02-01
DOI:
中文关键词:  红砂  珍珠猪毛菜  空间分布格局  环境因子  冗余分析
英文关键词:Reaumuria soongarica  Salsola passerina  spatial distribution pattern  environmental factors  redundancy analysis
基金项目:中国水科院基本科研业务费项目(MK0199A122021)
作者单位邮编
李锦荣* 中国水利水电科学研究院 内蒙古阴山北麓草原生态水文国家野外科学观测研究站 010020
王茹 中国水利水电科学研究院 内蒙古阴山北麓草原生态水文国家野外科学观测研究站 
董雷 中国水利水电科学研究院 内蒙古阴山北麓草原生态水文国家野外科学观测研究站 
张志杰 呼和浩特市气象局 
张晓燕 四子王旗水利局 
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中文摘要:
      为探究影响红砂+珍珠猪毛菜群落空间分布的主要环境因子,采用点格局分析方法和冗余分析(RDA),分析了植物种的空间分布格局及其与环境因子之间的关系。研究结果显示:随着多年平均降水量的减少,红砂种群、珍珠猪毛菜种群的空间聚集程度减弱、向随机分布趋势转化,表现出种内促进关系逐渐减弱的适应策略;种间关联性也表现出随降水的减少物种之间的促进关系逐渐减弱。消除生境异质性后,红砂种群、珍珠猪毛菜种群均在>30 m尺度下随机分布,种群内部表现为相互独立;空间关联性整体均呈现为负相关,种间关系表现为相互竞争,随着降水的减少存在向无相关性转变的趋势。利用冗余分析识别出导致群落植被特征产生差异的主要因素是气候、土壤、海拔,因此在制定更为有效的荒漠灌木多样性保育措施时不仅要考虑植被本身的特性,也要加强对荒漠土壤环境的保护。
英文摘要:
      To investigate the main environmental factors affecting the spatial distribution of Reaumuria soongarica + Salsola passerina communities, the spatial distribution patterns of plant species and their relationships with environmental factors were analyzed using the point pattern analysis method and redundancy analysis (RDA). The results showed that the spatial aggregation of R. soongarica populations and S. passerina populations weakened with the decrease of multi-year average precipitation, transforming to a random distribution trend and showing an adaptive strategy of gradually weakening intra-species facilitation relationships; inter-species associations also showed that the facilitation relationships between species gradually weakened with the decrease of precipitation. After eliminating habitat heterogeneity, the R. soongarica + S. passerina populations were randomly distributed at a scale of >30 m, and the populations were independent of each other; spatial correlation was negative overall, and interspecific relationships were competitive and tended to become uncorrelated with decreasing precipitation. The redundancy analysis identified that the main factors leading to the differences in vegetation characteristics of the communities were climate, soil, and altitude. Therefore, when formulating more effective conservation measures for desert shrub diversity, we should not only consider the characteristics of the vegetation itself, but also strengthen the protection of the desert soil environment.
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