Soil Fungal:Bacterial Ratios Are Linked to Altered Carbon Cycling

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

Fersiynau electronig

Dolenni

Dangosydd eitem ddigidol (DOI)

  • Ashish A. Malik
  • Somak Chowdhury
  • Veronika Schlager
  • Anna Oliver
  • Jeremy Puissant
  • Perla G. M. Vazquez
  • Nico Jehmlich
  • Martin von Bergen
  • Robert I. Griffiths
    Centre for Ecology and Hydrology, Wallingford, UK
  • Gerd Gleixner
Despite several lines of observational evidence, there is a lack of consensus on whether higher fungal:bacterial (F:B) ratios directly cause higher soil carbon (C) storage. We employed RNA sequencing, protein profiling and isotope tracer techniques to evaluate whether differing F:B ratios are associated with differences in C storage. A mesocosm 13C labeled foliar litter decomposition experiment was performed in two soils that were similar in their physico-chemical properties but differed in microbial community structure, specifically their F:B ratio (determined by PLFA analyses, RNA sequencing and protein profiling; all three corroborating each other). Following litter addition, we observed a consistent increase in abundance of fungal phyla; and greater increases in the fungal dominated soil; implicating the role of fungi in litter decomposition. Litter derived 13C in respired CO2 was consistently lower, and residual 13C in bulk SOM was higher in high F:B soil demonstrating greater C storage potential in the F:B dominated soil. We conclude that in this soil system, the increased abundance of fungi in both soils and the altered C cycling patterns in the F:B dominated soils highlight the significant role of fungi in litter decomposition and indicate that F:B ratios are linked to higher C storage potential.
Iaith wreiddiolSaesneg
CyfnodolynFrontiers in Microbiology
Cyfrol7
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 9 Awst 2016
Cyhoeddwyd yn allanolIe
Gweld graff cysylltiadau