初级生产
草原
环境科学
草地生态系统
降水
全球变化
生态系统
气候变化
大气科学
全球变暖
气候学
碳循环
非线性系统
生态学
气象学
地理
生物
地质学
物理
量子力学
作者
Kai Zhu,Nona R. Chiariello,Todd Tobeck,Tadashi Fukami,Christopher B. Field
标识
DOI:10.1073/pnas.1606734113
摘要
Significance Global environmental change involves many factors that occur simultaneously, yet they are usually studied in isolation. Here we report a long-term global change experiment that subjected California grassland to multiple individual and simultaneous changes in temperature, precipitation, carbon dioxide, and nitrogen. Our analysis revealed nonlinear and interactive effects of temperature and precipitation on grassland net primary production (NPP), which defined a ridge-shaped NPP response surface to these two variables. Added nitrogen raised the peak of the NPP response surface, and added CO 2 shifted the peak to lower temperatures. Our approach was validated by tests showing an absence of progressive effects over the years. In other ecosystems, our approach may be similarly powerful for probing the effects of multifactor global change.
科研通智能强力驱动
Strongly Powered by AbleSci AI