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草业学报 ›› 2022, Vol. 31 ›› Issue (8): 61-71.DOI: 10.11686/cyxb2021306

• 研究论文 • 上一篇    下一篇

高原鼠兔刈割对青海湖流域高寒草甸植物种间关联的影响

齐昊昊1(), 庞晓攀1, 周俗2, 郭正刚1()   

  1. 1.兰州大学草地农业生态系统国家重点实验室,兰州大学草地农业科技学院,甘肃 兰州 730020
    2.四川省林业科学研究院,四川 成都 611731
  • 收稿日期:2021-08-10 修回日期:2021-09-22 出版日期:2022-08-20 发布日期:2022-07-01
  • 通讯作者: 郭正刚
  • 作者简介:E-mail: guozhg@lzu.edu.cn
    齐昊昊(1998-),男,宁夏吴忠人,在读硕士。E-mail: qihh20@lzu.edu.cn
  • 基金资助:
    国家自然科学基金项目(32171675);甘肃省科技计划资助(21JR7RA489);中央高校基本科研业务费专项资金(lzujbky-2020-it12)

Effects of clipping by plateau pika on plant interspecific associations in alpine meadows in the Qinghai Lake Region

Hao-hao QI1(), Xiao-pan PANG1, Su ZHOU2, Zheng-gang GUO1()   

  1. 1.State Key Laboratory of Grassland Agro-ecosystems,College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China
    2.Sichuan Academy of Forestry,Chengdu 611731,China
  • Received:2021-08-10 Revised:2021-09-22 Online:2022-08-20 Published:2022-07-01
  • Contact: Zheng-gang GUO

摘要:

高原鼠兔喜欢刈割茂密高寒草甸中高大植物而影响植物群落内的种间关系。采用方差比率法、χ2检验和Spearman秩相关分析相结合的方法,分析了高原鼠兔刈割行为对高山嵩草草甸植物群落种间关联的影响。结果表明:高原鼠兔刈割会促进植物群落的种间总体联结从不显著正关联变为显著负关联,降低植物群落稳定性,减少植物群落内正关联和正相关的种对数量,增加负关联、无关联和负相关的种对数量。而综合χ2检验结果、AC值和OI指数,洞口植物群落大部分种对的种间关联均不显著,种间联结程度不强。这表明χ2检验和Spearman秩相关分析能够评价小型草食动物对植物群落种间关联的影响,为全面解析高原鼠兔整体干扰驱动植物群落结构变化提供了基础信息。

关键词: 高原鼠兔, 刈割行为, 种间联结, 相关性

Abstract:

Plateau pikas prefer to clip the tall plants in thick alpine meadow, which often alter the interspecific and intraspecific relationships among plants in the meadow. This study used the variance ratio, Chi-square (χ2) test and Spearman rank correlation coefficient to determine the effects of clipping by plateau pikas on interspecific association among plants. It was found that the clipping by plateau pikas resulted in the overall interspecific association being transformed from a non-significant positive association to a significant negative association, and decreased the stability of the plant community. The clipping by plateau pikas decreased the number of paired species with positive interspecific association and positive correlation, while it increased the number of paired species with negative interspecific association, no-interspecific association and negative correlation. The overall results of χ2 testing, association coefficient (AC) value and Ochiai (OI) index showed that there were no significant interspecific associations among most species pairs in the plant community, and the interspecific associations were unstable. These results indicate that the χ2 test and Spearman rank correlation coefficient can be used to quantify the effect of small herbivores on plant interspecific associations, and provide basic information on the responses of plant community structure to disturbance by plateau pika.

Key words: plateau pika, clipping behavior, interspecific association, correlation