文献类型： 外文期刊
作者： Chen, Ji 1 ; Elsgaard, Lars 1 ; van Groenigen, Kees Jan 4 ; Olesen, Jurgen E. 1 ; Liang, Zhi 1 ; Jiang, Yu 4 ; Laerke, 1 ;
作者机构： 1.Aarhus Univ, Dept Agroecol, DK-8830 Tjele, Denmark
2.Aarhus Univ, Ctr Circular Bioecon, Tjele, Denmark
3.Aarhus Univ, iCLIMATE Interdisciplinary Ctr Climate Change, Roskilde, Denmark
4.Univ Exeter, Coll Life & Environm Sci, Dept Geog, Exeter, Devon, England
5.Jiangsu Acad Agr Sci, Minist Agr & Rural Affairs, East China Sci Observing & Expt Stn Dev & Utiliza, Nanjing, Peoples R China
6.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA
7.No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA
8.Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA
关键词： climate-carbon feedback; experimental warming; extracellular enzyme; labile carbon pool; recalcitrant carbon pool; soil carbon storage; soil microorganism; warming duration
期刊名称：GLOBAL CHANGE BIOLOGY （ 影响因子：10.863； 五年影响因子：11.716 ）
ISSN： 1354-1013
年卷期：
页码：
收录情况： SCI
摘要： Climate warming affects soil carbon (C) dynamics, with possible serious consequences for soil C stocks and atmospheric CO2 concentrations. However, the mechanisms underlying changes in soil C storage are not well understood, hampering long-term predictions of climate C-feedbacks. The activity of the extracellular enzymes ligninase and cellulase can be used to track changes in the predominant C sources of soil microbes and can thus provide mechanistic insights into soil C loss pathways. Here we show, using meta-analysis, that reductions in soil C stocks with warming are associated with increased ratios of ligninase to cellulase activity. Furthermore, whereas long-term (>= 5 years) warming reduced the soil recalcitrant C pool by 14%, short-term warming had no significant effect. Together, these results suggest that warming stimulates microbial utilization of recalcitrant C pools, possibly exacerbating long-term climate-C feedbacks.
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