草原稳定的多维反应,使草原稳定
Qingqing Chen1,2, Shaopeng Wang3, Elizabeth T Borer4
1Institute of Ecology, College of Urban and Environmental Sciences, Peking University, Beijing, China.
Nature communications
|October 11, 2023
概括
添加营养物质损害了草原的稳定性,减少了物种丰富性和社区组成的弹性. 生物质稳定性没有受到影响,突出显示了复杂的生态系统对缩的反应.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 全球变化生物学
背景情况:
- 绿化影响草原的生物多样性,社区组成和生物质生产.
- 对这些草原社区的稳定性有什么影响仍然不清楚.
- 生态稳定是多方面的,不同稳定性指标 (维度) 之间存在不同程度的相关性.
研究的目的:
- 量化营养添加对草原稳定的五个方面的影响.
- 评估三个社区方面的稳定性:地面生物质,社区组成和物种丰富.
- 研究草原生态稳定的维度.
主要方法:
- 从全球NutNet (营养网络) 实验中利用了55个草原地点的标准化实验.
- 量化营养添加对时间不变性,耐药性 (在干燥/潮湿季节) 和恢复 (在干燥/潮湿季节之后) 的影响.
- 测量了地面生物质,社区组成和物种丰富性的稳定性.
主要成果:
- 添加营养物质显著降低了物种丰富度和社区组成的时间不变性和抵抗力,特别是在干燥和潮湿的生长季节.
- 生物质稳定性 (不变性,抵抗性,恢复性) 没有受到营养添加的显著影响.
- 不同的稳定性测量在环境条件和环保条件下基本上没有相关性,这表明了高维度.
结论:
- 添加营养素会对草原社区的组成和物种丰富性的稳定性产生负面影响,但不会对生物质的稳定性产生负面影响.
- 生态稳定的高维度表明了复杂而多样化的生态系统反应.
- 了解稳定性维度对于预测草原生态系统对全球环境变化的反应至关重要.
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