期刊
ECOLOGY LETTERS
卷 14, 期 4, 页码 349-357出版社
WILEY
DOI: 10.1111/j.1461-0248.2011.01593.x
关键词
Carbon sequestration; coupled biogeochemical cycles; coupled climate-carbon cycle models; elevated CO2; forest productivity; nitrogen
类别
资金
- Direct For Biological Sciences
- Division Of Environmental Biology [0816916] Funding Source: National Science Foundation
P>The earth's future climate state is highly dependent upon changes in terrestrial C storage in response to rising concentrations of atmospheric CO2. Here we show that consistently enhanced rates of net primary production (NPP) are sustained by a C-cascade through the root-microbe-soil system; increases in the flux of C belowground under elevated CO2 stimulated microbial activity, accelerated the rate of soil organic matter decomposition and stimulated tree uptake of N bound to this SOM. This process set into motion a positive feedback maintaining greater C gain under elevated CO2 as a result of increases in canopy N content and higher photosynthetic N-use efficiency. The ecosystem-level consequence of the enhanced requirement for N and the exchange of plant C for N belowground is the dominance of C storage in tree biomass but the preclusion of a large C sink in the soil.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据