动物的干扰通过调节Hulun Buir草原的植物和土壤功能来降低生态系统的稳定性
Yuanjun Zhu1, Xiaohui Yang1, Ya Tu2
1Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China; Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing 100091, China.
The Science of the total environment
|April 5, 2024
概括
布兰特飞干扰对欧亚草原生态系统的稳定性产生了负面影响. 动物活动增加减少了植物覆盖和土壤碳,但增加了,破坏了生态系统的稳定.
科学领域:
- 生态生态学 生态生态学
- 生态系统动力学 生态系统动力学
- 动物生态 动物生态
背景情况:
- 布兰特 (Lasiopodomys brandtii) 是欧亚草原的一个关键物种,但其对生态系统稳定的确切影响尚不清楚.
- 了解动物引起的干扰对于管理多功能放牧生态系统至关重要.
研究的目的:
- 用洞穴指标量化布兰特小鸟造成的干扰水平.
- 评估布兰特虫干扰对植物和土壤功能的影响.
- 评估后续对整体生态系统功能稳定的影响.
主要方法:
- 在Hulun Buir草原进行实地研究,利用洞穴入口面积和密度创建一个干扰指数 (DI).
- 应用了一般化的线性混合效应模型和N维超体积框架.
- 对植物功能 (覆盖,ABG,ShootC,ShootN,RootN) 和土壤功能 (SoilN,SoilP,SoilC) 的分析.
主要成果:
- 增加布兰特飞的干扰显著减少了植被覆盖面,地表生物质,并射出碳.
- 射击和根对增加的干扰产生了积极的反应.
- 土壤的,和有机碳等土壤功能随着干扰水平的提高而显著下降.
- 洞穴入口面积对功能的影响比洞穴密度更大,影响植物功能比土壤功能更大.
- 生态系统的功能稳定性随着干扰的加剧而下降,植物表现出更高的稳定性,土壤在中等干扰水平时表现出最高稳定性.
结论:
- 布兰特虫的干扰在欧亚大草原中显著改变了植物和土壤功能.
- 植物功能比土壤功能更容易受到布兰特虫干扰.
- 强化动物活动导致生态系统不稳定,对植物和土壤的功能稳定性产生不同的影响.
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