Soil carbon loss with warming New evidence from carbon-degrading enzymes

Soil carbon loss with warming : New evidence from carbon-degrading enzymes

© 2020 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 26(2020), 4 vom: 15. Apr., Seite 1944-1952
1. Verfasser: Chen, Ji (VerfasserIn)
Weitere Verfasser: Elsgaard, Lars, van Groenigen, Kees Jan, Olesen, Jørgen E, Liang, Zhi, Jiang, Yu, Laerke, Poul E, Zhang, Yuefang, Luo, Yiqi, Hungate, Bruce A, Sinsabaugh, Robert L, Jørgensen, Uffe
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article climate-carbon feedback experimental warming extracellular enzyme labile carbon pool recalcitrant carbon pool soil carbon storage soil microorganism warming duration
Beschreibung
Zusammenfassung:© 2020 John Wiley & Sons Ltd.
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
Beschreibung:Date Revised 29.11.2023
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1365-2486
DOI:10.1111/gcb.14986