Alternative stable states of the forest mycobiome are maintained through positive feedbacks

Averill, C.; /Fortunel, Claire; Maynard, D. S.; van den Hoogen, J.; Dietze, M. C.; Bhatnagar, J. M.; Crowther, T. W.

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dc.creator	Averill, C.
dc.creator	/Fortunel, Claire
dc.creator	Maynard, D. S.
dc.creator	van den Hoogen, J.
dc.creator	Dietze, M. C.
dc.creator	Bhatnagar, J. M.
dc.creator	Crowther, T. W.
dc.date	2022
dc.date.accessioned	2022-04-27T17:37:46Z
dc.date.available	2022-04-27T17:37:46Z
dc.identifier	https://www.documentation.ird.fr/hor/fdi:010084519
dc.identifier	oai:ird.fr:fdi:010084519
dc.identifier	Averill C., Fortunel Claire, Maynard D. S., van den Hoogen J., Dietze M. C., Bhatnagar J. M., Crowther T. W.. Alternative stable states of the forest mycobiome are maintained through positive feedbacks. 2022, 22, 375-382
dc.identifier.uri	http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/169082
dc.description	Most trees on Earth form a symbiosis with either arbuscular mycorrhizal or ectomycorrhizal fungi. By forming common mycorrhizal networks, actively modifying the soil environment and other ecological mechanisms, these contrasting symbioses may generate positive feedbacks that favour their own mycorrhizal strategy (that is, the con-mycorrhizal strategy) at the expense of the alternative strategy. Positive con-mycorrhizal feedbacks set the stage for alternative stable states of forests and their fungi, where the presence of different forest mycorrhizal strategies is determined not only by external environmental conditions but also mycorrhiza-mediated feedbacks embedded within the forest ecosystem. Here, we test this hypothesis using thousands of US forest inventory sites to show that arbuscular and ectomycorrhizal tree recruitment and survival exhibit positive con-mycorrhizal density dependence. Data-driven simulations show that these positive feedbacks are sufficient in magnitude to generate and maintain alternative stable states of the forest mycobiome. Given the links between forest mycorrhizal strategy and carbon sequestration potential, the presence of mycorrhizal-mediated alternative stable states affects how we forecast forest composition, carbon sequestration and terrestrial climate feedbacks. Forests tend to be comprised of tree species that mostly associate with either arbuscular or ectomycorrhizal fungi. The authors show that positive feedbacks maintain this biomodal distribution of dominant mycorrhizal associations across US forest inventory plots.
dc.language	EN
dc.title	Alternative stable states of the forest mycobiome are maintained through positive feedbacks
dc.type	text
dc.coverage	AMERIQUE DU NORD