Shifts in the Abundances of Saprotrophic and Ectomycorrhizal Fungi With Altered Leaf Litter Inputs
Marañón Jiménez, Sara (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Radujkovic, Dajana (University of Antwerp. Department of Biology)
Verbruggen, Erik (University of Antwerp. Department of Biology)
Grau Fernández, Oriol (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Cuntz, Matthias (Université de Lorraine)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Richter, Andreas (Universität Wien. Department of Microbiology and Ecosystem Science)
Schrumpf, Marion (Max Planck Institute for Biogeochemistry)
Rebmann, Corinna (UFZ-Helmholtz Centre for Environmental Research)

Fecha:	2021
Resumen:	Ectomycorrhizal (EcM) and saprotrophic fungi interact in the breakdown of organic matter, but the mechanisms underlying the EcM role on organic matter decomposition are not totally clear. We hypothesized that the ecological relations between EcM and saprotroph fungi are modulated by resources availability and accessibility, determining decomposition rates. We manipulated the amount of leaf litter inputs (No-Litter, Control Litter, Doubled Litter) on Trenched (root exclusion) and Non-Trenched plots (with roots) in a temperate deciduous forest of EcM-associated trees. Resultant shifts in soil fungal communities were determined by phospholipid fatty acids and DNA sequencing after 3 years, and CO fluxes were measured throughout this period. Different levels of leaf litter inputs generated a gradient of organic substrate availability and accessibility, altering the composition and ecological relations between EcM and saprotroph fungal communities. EcM fungi dominated at low levels of fresh organic substrates and lower organic matter quality, where short-distances exploration types seem to be better competitors, whereas saprotrophs and longer exploration types of EcM fungi tended to dominate at high levels of leaf litter inputs, where labile organic substrates were easily accessible. We were, however, not able to detect unequivocal signs of competition between these fungal groups for common resources. These results point to the relevance of substrate quality and availability as key factors determining the role of EcM and saprotroph fungi on litter and soil organic matter decay and represent a path forward on the capacity of organic matter decomposition of different exploration types of EcM fungi.
Ayudas:	European Commission 291780 European Commission 750252 European Commission 610028
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	CO fluxes ; Gadgil effect ; Ectomycorrhiza fungal exploration types ; Litter decomposition ; Soil fungal communities ; Plant detritus
Publicado en:	Frontiers in plant science, Vol. 12 (July 2021) , art. 682142, ISSN 1664-462X

DOI: 10.3389/fpls.2021.682142
PMID: 34367207

17 p, 5.1 MB

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