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Quantitative assessment of the differential impacts of arbuscular and ectomycorrhiza on soil carbon cycling
A significant fraction of carbon stored in the Earth’s soil moves through arbuscular mycorrhiza
(AM) and ectomycorrhiza (EM). The impacts of AM and EM on the soil carbon budget
are poorly understood.
We propose a method to quantify the mycorrhizal contribution to carbon cycling, explicitly
accounting for the abundance of plant-associated and extraradical mycorrhizal mycelium. We
discuss the need to acquire additional data to use our method, and present our new global
database holding information on plant species-by-site intensity of root colonization by mycorrhizas.
We demonstrate that the degree of mycorrhizal fungal colonization has globally consistent
patterns across plant species. This suggests that the level of plant species-specific root
colonization can be used as a plant trait.
To exemplify our method, we assessed the differential impacts of AM : EM ratio and EM
shrub encroachment on carbon stocks in sub...
Show moreA significant fraction of carbon stored in the Earth’s soil moves through arbuscular mycorrhiza
(AM) and ectomycorrhiza (EM). The impacts of AM and EM on the soil carbon budget
are poorly understood.
We propose a method to quantify the mycorrhizal contribution to carbon cycling, explicitly
accounting for the abundance of plant-associated and extraradical mycorrhizal mycelium. We
discuss the need to acquire additional data to use our method, and present our new global
database holding information on plant species-by-site intensity of root colonization by mycorrhizas.
We demonstrate that the degree of mycorrhizal fungal colonization has globally consistent
patterns across plant species. This suggests that the level of plant species-specific root
colonization can be used as a plant trait.
To exemplify our method, we assessed the differential impacts of AM : EM ratio and EM
shrub encroachment on carbon stocks in sub-arctic tundra. AM and EM affect tundra carbon
stocks at different magnitudes, and via partly distinct dominant pathways: via extraradical
mycelium (both EM and AM) and via mycorrhizal impacts on above- and belowground biomass
carbon (mostly AM).
Our method provides a powerful tool for the quantitative assessment of mycorrhizal impact
on local and global carbon cycling processes, paving the way towards an improved understanding
of the role of mycorrhizas in the Earth’s carbon cycle.
Show less- All authors
- Soudzilovskaia, N.A.; Van der Heijden, M.G.A.; Cornelissen, J.H.C.; Makarov, M.I.; Onipchenko, V.G.; Maslov, M.M.; Akhmetzhanova, A.A.; Bodegom, P.M. van
- Date
- 2015-04-01
- Journal
- New Phytologist
- Volume
- 208
- Issue
- 1
- Pages
- 280–293