Fungal Necromass Carbon Dominates Global Soil Organic Carbon Storage
© 2025 John Wiley & Sons Ltd.
| Veröffentlicht in: | Global change biology. - 1999. - 31(2025), 8 vom: 15. Aug., Seite e70413 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2025
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| Zugriff auf das übergeordnete Werk: | Global change biology |
| Schlagworte: | Journal Article Meta-Analysis bacterial necromass carbon ecosystem fungal necromass carbon plant‐derived carbon soil organic carbon Soil Carbon 7440-44-0 |
| Zusammenfassung: | © 2025 John Wiley & Sons Ltd. Soil organic carbon (C) is derived primarily from plant and microbial necromass; however, the global distribution and contribution of different necromass inputs to soil C storage remain unclear. We conducted a global meta-analysis encompassing 2410 observations from 249 microbial necromass studies and 786 observations from 72 plant residue studies. The results showed that the content of microbial-derived C (10.63 ± 0.39 g C kg-1 soil) exceeded that of plant-derived C (lignin phenol carbon (LPC), 5.63 ± 0.45 g C kg-1 soil), across the 0-100 cm soil profile, with fungal necromass carbon (FNC; 7.24 ± 0.21 g C kg-1) contributing the most to soil C-a pattern consistently observed across all depths. In addition, in the topsoil (0-20 cm), forests (9.39 ± 1.22 g C kg-1) and grasslands (9.73 ± 1.74 g C kg-1) showed significantly higher LPC contents than croplands and wetlands; therefore, cropland expansion significantly reduces microbial- and plant-derived carbon stocks in topsoil. Global FNC, BNC, and LPC stocks were estimated to be 211 Pg (95% CI: 156-270 Pg), 71 Pg (95% CI: 59-88 Pg) and 168 Pg (95% CI: 151-186 Pg) in topsoil, respectively. Lower soil pH and mean annual temperature were associated with higher FNC, BNC, and LPC contents, particularly in high-latitude regions like North America. These results demonstrate that microbial necromass, rather than plant residues, dominates soil C storage globally. These findings highlight the need for management strategies that address both land-use change and rising temperatures to protect microbial and plant C pools |
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| Beschreibung: | Date Completed 09.08.2025 Date Revised 12.08.2025 published: Print Citation Status MEDLINE |
| ISSN: | 1365-2486 |
| DOI: | 10.1111/gcb.70413 |