Climate warming alters subsoil but not topsoil carbon dynamics in alpine grassland
文献类型：期刊论文
| 作者 | Jia, Juan; Cao, Zhenjiao; Liu, Chengzhu; Zhang, Zhenhua ; Lin, Li; Wang, Yiyun; Haghipour, Negar; Wacker, Lukas; Bao, Hongyan; Dittmar, Thorston
|
| 刊名 | GLOBAL CHANGE BIOLOGY
 |
| 出版日期 | 2019 |
| 卷号 | 25期号:12 |
| 关键词 | deep soil lignin decomposition physical fraction radiocarbon soil organic carbon warming |
| 英文摘要 | Subsoil contains more than half of soil organic carbon (SOC) globally and is conventionally assumed to be relatively unresponsive to warming compared to the topsoil. Here, we show substantial changes in carbon allocation and dynamics of the subsoil but not topsoil in the Qinghai-Tibetan alpine grasslands over 5 years of warming. Specifically, warming enhanced the accumulation of newly synthesized (C-14-enriched) carbon in the subsoil slow-cycling pool (silt-clay fraction) but promoted the decomposition of plant-derived lignin in the fast-cycling pool (macroaggregates). These changes mirrored an accumulation of lipids and sugars at the expense of lignin in the warmed bulk subsoil, likely associated with shortened soil freezing period and a deepening root system. As warming is accompanied by deepening roots in a wide range of ecosystems, root-driven accrual of slow-cycling pool may represent an important and overlooked mechanism for a potential long-term carbon sink at depth. Moreover, given the contrasting sensitivity of SOC dynamics at varied depths, warming studies focusing only on surface soils may vastly misrepresent shifts in ecosystem carbon storage under climate change. |
| 源URL | [http://210.75.249.4/handle/363003/59688]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 推荐引用方式 GB/T 7714 | Jia, Juan,Cao, Zhenjiao,Liu, Chengzhu,et al. Climate warming alters subsoil but not topsoil carbon dynamics in alpine grassland[J]. GLOBAL CHANGE BIOLOGY,2019,25(12). |
| APA | Jia, Juan.,Cao, Zhenjiao.,Liu, Chengzhu.,Zhang, Zhenhua.,Lin, Li.,...&Feng, Xiaojuan.(2019).Climate warming alters subsoil but not topsoil carbon dynamics in alpine grassland.GLOBAL CHANGE BIOLOGY,25(12). |
| MLA | Jia, Juan,et al."Climate warming alters subsoil but not topsoil carbon dynamics in alpine grassland".GLOBAL CHANGE BIOLOGY 25.12(2019). |
入库方式： OAI收割
来源：西北高原生物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。