网站地图 | 联系我们 | 管理系统 | 登录邮箱 | 内网办公 | English | 中国科学院    
首页 所况介绍 机构设置 科研成果 研究队伍 合作交流 研究生教育 党群园地 科学传播
 
 
 当前位置:首页 >>> 论文库

Progressive nitrogen limitation across the Tibetan alpine permafrost region

作 者:Kou D, Yang GB, Li F, Feng XH, Zhang DY, Mao C, Zhang QW, Peng YF, Ji CJ, Zhu QA, Fang YT, Liu XY, Xu-Ri, Li SQ, Deng J, Zheng XH, Fang JY, Yang YH*
影响因子: 12.121
刊物名称: Nature Communications
出版年份: 2020
卷: 11  期: 1   页码: 3331

文章摘要 : 

The ecosystem carbon (C) balance in permafrost regions, which has a global significance in understanding the terrestrial C-climate feedback, is significantly regulated by nitrogen (N) dynamics. However, our knowledge on temporal changes in vegetation N limitation (i.e., the supply of N relative to plant N demand) in permafrost ecosystems is still limited. Based on the combination of isotopic observations derived from a re-sampling campaign along a ~3000 km transect and simulations obtained from a process-based biogeochemical model, here we detect changes in ecosystem N cycle across the Tibetan alpine permafrost region over the past decade. We find that vegetation N limitation becomes stronger despite the increased available N production. The enhanced N limitation on vegetation growth is driven by the joint effects of elevated plant N demand and gaseous N loss. These findings suggest that N would constrain the future trajectory of ecosystem C cycle in this alpine permafrost region.


| 本站导航 | 园区风光| 联系我们 |
版权所有:中国科学院植物研究所 地址:北京市海淀区香山南辛村20号 邮编:100093 电话:010-62590835
网站备案号:京ICP备05002828号       文保网安备案号:1101080078