综合模型揭示了生产力和植物物种丰富性之间的联系机制
James B Grace1, T Michael Anderson2, Eric W Seabloom3
1US Geological Survey, Wetland and Aquatic Research Center, 700 Cajundome Boulevard, Lafayette, Louisiana 70506, USA.
Nature
|January 14, 2016
概括
生态系统的生产力和物种丰富性由多种机制联系在一起, 一个综合性模型揭示了财富提高了生产力, 竞争总是很重要,
科学领域:
- 生态学
- 全球变化生物学
- 生物多样性科学
背景情况:
- 生态系统的生产力与物种丰富之间的关系是生态学的长期争论.
- 之前的研究很难确定全球模式的确切机制.
- 现有理论对生产力和财富的相互作用提供了矛盾的解释.
研究的目的:
- 将多个生态理论整合到一个单一的综合模型中.
- 通过使用全球数据,确定连接生态系统生产力和物种丰富性的关键机制.
- 测试整合模型的解释能力与传统的双变量分析.
主要方法:
- 收集了五大洲1126个草原的数据.
- 结合各种生态理论预测的综合模型的开发.
- 统计分析以检测底层机制的信号并比较模型性能.
主要成果:
- 综合模型在解释生产力与财富关系方面显著优于传统的双变量分析.
- 种类丰富总是提高生态系统的生产力, 这与一些表面观察相反.
- 竞争在所有生产水平上都起着至关重要的作用,宏观生态梯度也影响了当地财富.
结论:
- 综合建模方法对于理解复杂的生态系统至关重要.
- 这项研究揭示了一些令人惊且一致的机制,
- 这项研究提升了我们辨别生态系统生产力和生物多样性的过程的能力.
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