叶子的发育和人口结构解释了亚马逊常青森林的光合作用季节性
Jin Wu1, Loren P Albert2, Aline P Lopes3
1Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA. jinwu@email.arizona.edu saleska@email.arizona.edu.
Science (New York, N.Y.)
|February 27, 2016
概括
热带森林的光合作用季节性是由树冠现象驱动的,而不是气候. 同步的叶子生长促进生态系统的光合作用,
科学领域:
- 生态学
- 森林生态
- 热带森林科学
背景情况:
- 常青热带森林的光合作用季节性是鲜为人知的.
- 现有的地球系统模型不充分代表这些过程.
研究的目的:
- 确定亚马逊森林中光合作用季节性的主要驱动因素.
- 提高热带生态系统的地球系统模型的准确性.
主要方法:
- 结合摄像机观测与生态系统二氧化碳流量测量
- 在亚马逊地区研究降雨梯度的森林.
主要成果:
- 聚合树冠现象学,特别是干旱季节的叶子,是光合作用季节性的主要驱动因素.
- 这种现象变化使生态系统的光合作用增加了约27%.
- 年轻,光效较高的叶子有助于季节性光合作用增加.
结论:
- 协调的叶子发育和人口结构解释了多个尺度上的光合作用季节性.
- 在热带森林中准确地进行气候变化影响模拟时,必须纳入叶子层面的表态学.
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