繁茂的牧场导致稀疏草的植物集群碎片化
Zihan Wang1, Shijie Lv2, Hongmei Liu3
1College of Grassland, Resources and Environment Inner Mongolia Agricultural University Hohhot Inner Mongolia China.
Ecology and evolution
|October 9, 2023
概括
强烈的牧场影响Cleistogenes songorica,一个关键的草原物种,导致密度增加,但高度和覆盖面积减少. 空间分布向带状模式转移,在重放牧和更大的尺度下,异质性减少.
科学领域:
- 生态生态学 生态生态学
- 植物学 植物学
- 牧场管理 牧场管理
背景情况:
- 克利斯托格尼斯·桑戈里卡 (Cleistogenes songorica) 是Stipa breviflora沙漠草原中占主导地位的一种草.
- 虽然Stipa breviflora在放牧时显示集群碎片化,但C. songorica的反应不太了解.
- 这项研究调查了C. songorica在放牧压力下的空间分布.
研究的目的:
- 为了确定C. songorica种群是否在强烈的放牧中表现出集群分裂.
- 分析C. songorica在各种放牧强度和空间尺度上的空间分布模式.
- 了解放牧对C. songorica种群结构和空间异质性的影响.
主要方法:
- 使用了差异分析和地缘统计方法.
- 在四种放牧强度 (CK,LG,MG,HG) 中测量了C. songorica的空间分布.
- 在四个不同的空间尺度 (10x10cm到50x50cm) 中进行了测量.
主要成果:
- 增加的牧场强度与更高的C. songorica密度相关,但降低了高度,覆盖面和站立作物.
- 空间分布受结构因素的影响,异质性在较大的规模下降.
- 补丁面积增加,分布趋向于带状模式,加剧放牧和规模.
结论:
- 密集的放牧和更大的空间尺度削弱了C. songorica的空间分布的异质性.
- 在这些条件下,C. songorica的空间分布呈现出更大的一致性.
- 牧场管理策略应考虑空间规模和强度,以保持草原的健康.
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