养殖率对沙漠草原植物群体的状态过渡过程的影响
Shijie Lv1, Zihan Wang2, Hui Zhang2
1College of Grassland Science, Inner Mongolia Agricultural University, Hohhot, 010018, China. lshj123@163.com.
BMC plant biology
|January 15, 2026
概括
牧场在沙漠草原生态系统中创造了多个稳定的状态. 逐步减少牧场,而不是围,是通过管理物种和功能性群体动态来恢复退化的草原的关键.
科学领域:
- 生态生态学 生态生态学
- 牧场科学 牧场科学
- 保护生物学 保护生物学
背景情况:
- 沙漠草原生态系统由于放牧而面临退化.
- 了解植物群落在放牧期间的状态转变对于有效管理至关重要.
- 这些转变背后的网络驱动机制需要在多个层次层次上进行调查.
研究的目的:
- 研究沙漠草原中不同种植率下的植物社区状态过渡过程.
- 揭示物种,功能组和植物家族层面上这些转变的内在特征和网络驱动机制.
- 为优化草原管理和恢复退化的生态系统提供科学基础.
主要方法:
- 在Stipa breviflora沙漠草原进行的研究,使用了四种放牧处理 (控制,轻,中等,重).
- 量化植物种群的高度,覆盖面,密度和计算重要性值.
- 建立了一个基于物种组成和资源分配矩阵的布雷-库蒂斯状态过渡模型.
主要成果:
- 在控制 (不放牧) 治疗中,社区的自我稳定性最高.
- 随着种群数量的增加,物种组成的稳定性增加,而资源分配的稳定性下降.
- 牧场干扰促进了草原退化而不是恢复;建议逐步减少牧场以恢复.
- 国家转型发生在多个层面,在人口相似性和资源依赖性方面具有明显的模式.
- 功能性群体 (多年生草,,灌木) 和家族 (Poaceae,Asteraceae,Chenopodiaceae) 在资源动态和转移中表现出特定的角色.
结论:
- 牧场在沙漠草原植物群落中诱导了多个稳定的状态.
- 种类和功能组/家族的反应和重新配置是状态过渡的核心驱动力.
- 与排斥 (围) 相比,逐步降低养殖率是退化草原恢复的优越策略.
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