在草原上,地下与地面生产力的资源限制不同
Tingting Li1,2, Ruiyang Zhang1, Xinli Chen3
1Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China.
Nature communications
|December 6, 2025
概括
在中介水条件下,地下草原的生产力受到的最大限制,而不是随着更多降水而加剧的地面生产力. 这凸显了植物生长的不同资源需求.
科学领域:
- 生态生态学 生态生态学
- 植物科学 植物科学
- 全球变化生物学
背景情况:
- 水和营养对草原的生产力至关重要.
- 对地下资源限制的理解不如地面生产力那么发达.
研究的目的:
- 调查 (N) 和 (P) 限制对地下草原生产力的全球模式.
- 将地下资源限制与影响地面生产力的资源限制进行比较.
- 探索水的可用性对营养限制的影响.
主要方法:
- 387个N和299个P加法实验的元分析.
- 从长期草原实验中整合数据.
- 分析与降水有关的空间和时间模式.
主要成果:
- 地下生产力在中间降水下显示峰值N限制,与地面生产力形成鲜明对比.
- 这种N限制模式在空间和时间尺度上是一致的.
- 结果表明,在中间湿度下,用于地下生产力的和水的共同限制.
结论:
- 草原的地下和地面生产力表现出不同的营养限制.
- 降水变化显著影响地下营养限制和草原的整体功能.
- 这些发现强调了水的变化在调节地下生态系统过程中的重要性.
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