草地学报 ›› 2026, Vol. 34 ›› Issue (10): 3784-3794.DOI: 10.11733/j.issn.1007-0435.2026.10.024

• 研究论文 • 上一篇    

山西东南地区典型灌丛草地优势草本植物生态位及种间联结性

詹文晶1, 马维越1, 段迎港1, 孙梦雨1, 黄体乐1, 武红柱2, 李茂2, 高文俊1   

  1. 1. 山西农业大学草业学院, 山西 晋中 030801;
    2. 山西省林业和草原局, 山西 太原 030000
  • 收稿日期:2025-10-29 修回日期:2026-01-26 发布日期:2026-10-10
  • 通讯作者: 高文俊, E-mail: wenjungao437@126.com
  • 作者简介:詹文晶(2000-),女,汉族,吉林长春人,硕士研究生,主要从事草地生态与管理研究,E-mail:18504417446@163.com
  • 基金资助:
    山西省草种质资源普查与收集评价项目(LCZZZY2022-02)资助

Niche and Interspecific Associations of Dominant Herbaceous Species in Typical Shrub Grasslands in Southeastern Shanxi Region

ZHAN Wen-jing1, MA Wei-yue1, DUAN Ying-gang1, SUN Meng-yu1, HUANG Ti-le1, WU Hong-zhu2, LI Mao2, GAO Wen-jun1   

  1. 1. College of Grassland Science, Shanxi Agricultural University, Jinzhong, Shanxi Province 030801, China;
    2. Shanxi Forestry and Grassland Administration, Taiyuan, Shanxi Province 030000, China
  • Received:2025-10-29 Revised:2026-01-26 Published:2026-10-10

摘要: 为探究灌丛草地优势草本植物的生态位特征及种间关系,以山西东南地区典型灌丛草地22个优势草本植物为研究对象,运用Shannon-Wiener生态位宽度、Pianka生态位重叠度、方差比率法(Variance ratio, VR)、χ2检验、联结系数(Association coefficient, AC)、Spearman秩相关检验表征生态位及种间联结性,利用线性回归法分析生态位特征与种间联结性的关系。结果表明:在22个优势草本植物形成的231个种对中,生态位宽度最大的为白莲蒿(Artemisia gmelinii),其次为华北米蒿(Artemisia giraldii),最小的为黄背草(Themeda triandra)。生态位重叠值大多低于0.5,说明物种之间对环境资源需求的相似性较小,种间竞争较弱;优势草本植物总体联结度呈不显著正联结,χ2检验、AC和Spearman秩相关检验发现,正负联结比均小于1,表明山西典型灌丛草地处于竞争激烈,整体结构和种间关系仍在调整中。生态位重叠度指数与AC和Spearman秩相关系数间均存在极显著的正相关关系。

关键词: 灌丛草地, 优势植物, 生态位, 种间联结, 山西东南地区

Abstract: This study investigated the niche characteristics and interspecific relationships of dominant herbaceous plants in shrub grasslands by examining 22 dominant herbaceous species from a typical shrub grassland in southeastern Shanxi region. The research employed multiple analytical methods, including the Shannon-Wiener niche breadth index, Pianka niche overlap index, variance ratio method (VR), χ2 test, association coefficient (AC), and Spearman’s rank correlation, to quantify niche parameters and interspecific associations. Linear regression analysis was used to examine the relationships between niche characteristics and interspecific associations. Analysis of the 231 species pairs formed by the 22 dominant herbaceous plants revealed that Artemisia gmelinii exhibited the largest niche breadth, followed by Artemisia giraldii, while Themeda triandra showed the smallest niche breadth. Most niche overlap values were below 0.5, indicating limited similarity in environmental resource requirements among species and relatively weak interspecific competition. The overall interspecific association showed a non-significant positive association, with ratios of positive to negative associations derived from the χ2 test, association coefficient (AC), and Spearman’s rank correlation all below 1. These findings indicated intense competition within the shrub grassland community, with both community structure and interspecific relationships undergoing active adjustment. A highly significant positive correlation was identified between the niche overlap index and both the association coefficient (AC) and Spearman’s rank correlation coefficient.

Key words: Shrub grassland, Dominant plants, Niche, Interspecific association, Southeastern Shanxi region

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