陆地植物生产在全球气候梯度的融合
Sean T Michaletz1, Dongliang Cheng2, Andrew J Kerkhoff3
1Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721, USA.
Nature
|July 22, 2014
概括
气候间接影响陆地净初级产量 (NPP),主要是通过植物年龄和生物质,而不是直接的温度或降水效应. 了解这些扩展关系是准确的全球变化模型的关键.
科学领域:
- 生态生态学 生态生态学
- 生态系统科学 生态系统科学
- 植物生理学 植物生理学
背景情况:
- 陆地净初级生产 (NPP) 对生态系统功能和碳循环至关重要.
- 传统上,人们认为气候通过温度和降水对植物新陈代谢的影响直接影响核电站.
研究的目的:
- 调查直接与间接气候影响对陆地核电站的相对重要性.
- 扩展代谢缩放理论以解释全球NPP变异.
主要方法:
- 利用了生态系统木质植物生物质和生产的全球数据集.
- 应用扩展代谢缩放理论,将气候因素与核电站联系起来.
主要成果:
- 植物年龄和支架生物量是核电站变化的主要驱动因素,解释了大多数观察到的差异.
- 温度和降水对核电站的直接影响很小,这表明气候的间接影响.
结论:
- 气候对陆地核电站的影响主要是间接的,由植物年龄和生物质等因素介导.
- 一个共同的缩放关系支配了核电站的变化,为改善全球变化模型和生态系统功能预测提供了一种机制.
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