草原的退化改变了植物和土壤的生物多样性-多功能性关系
Xiaoxia Gao1,2, Dianye Zhang1,2, Yunfeng Peng1,2
1State Key Laboratory of Forage Breeding-by-Design and Utilization; Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China.
Nature plants
|November 10, 2025
概括
西藏高山地区的温和草原退化令人惊地增加了土壤生物多样性及其对生态系统多功能性 (EMF) 的影响. 植物丰富度下降,但土壤微生物对生态系统功能变得越来越重要.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 土壤科学 土壤科学
背景情况:
- 生物多样性被认为可以增强生态系统的多功能性 (EMF).
- 草原退化对生物多样性-EMF关系的影响尚不清楚.
- 西藏高山草原面临着退化,需要对其生态动态进行研究.
研究的目的:
- 研究如何适度的草原退化影响生态系统功能,EMF,和生物多样性在西藏高山草原.
- 分析植物和土壤生物多样性在退化中的转变.
- 确定草原退化如何改变生物多样性和EMF之间的关系.
主要方法:
- 在44个地点和792个方位沿着2600公里的横断线进行了对照观测.
- 评估了20种生态系统功能替代物,电磁场,植物丰富性和土壤细菌,真菌和原生动物丰富性.
- 利用结构方程建模来分析生物多样性-EMF关系.
主要成果:
- 温和的草原退化导致了个体生态系统功能和EMF的减少.
- 植物丰富性下降,而土壤综合生物多样性 (细菌,真菌,原生动物丰富性) 增加.
- 结构方程模型表明,土壤生物多样性对EMF的影响增强,植物丰富性降解后的影响减弱.
结论:
- 西藏高山地区的温和草原退化放大了土壤生物多样性.
- 土壤生物多样性在降解的草原中保持EMF方面发挥着越来越重要的作用.
- 这些发现强调了地下生物多样性对生态系统在环境压力下运作的关键贡献.
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