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Functional stability of mycorrhizal interactions in woody natives and aliens facing fire disturbance

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Abstract

Changes in soil biota following fire and its successive influence on their interactions with plants may have direct implications on the invasion success of woody alien species in fire-prone ecosystems. In this work, we experimentally addressed if soil biota from burned and unburned areas differentially affect growth and nutrition of two dominant woody natives (Lithraea molleoides and Vachellia caven) and three woody invaders (Gleditsia triacanthos, Ligustrum lucidum and Pyracantha angustifolia) that occur on fire-prone ecosystems of central Argentina. Our results indicate that growth and P content in tissues of both woody natives Lithraea and Vachellia were generally benefited by arbuscular mycorrhizal fungi (AMF) and that these effects did not strongly differ between AMF communities from burned and unburned soils. In the case of alien species, differences in growth and nutrition in response to AMF were related more to the identity of the invader than on the provenance of the soil biota. This study provides evidence on the important role that soil biota may have in the success of woody aliens in these ecosystems and on the functional stability of AMF communities facing disturbances.

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Acknowledgements

The authors wish to acknowledge the assistance of the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and the Universidad Nacional de Córdoba (U.N.C), both of which have provided facilities used for this study. This research program is funded by Secretaría de Ciencia y Tecnología: Universidad Nacional de Córdoba (Secyt) (Universidad Nacional de Córdoba) and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). S.L., E.N., P.A.T., and C.U. are Researchers of CONICET, and Professors at the U.N.C. The editors and three anonymous reviewers provided critical comments and suggestions that improved the quality of this manuscript.

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Correspondence to Silvana Longo.

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Communicated by Martin Nunez.

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Longo, S., Nouhra, E., Tecco, P.A. et al. Functional stability of mycorrhizal interactions in woody natives and aliens facing fire disturbance. Plant Ecol 221, 321–331 (2020). https://doi.org/10.1007/s11258-020-01014-3

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  • DOI: https://doi.org/10.1007/s11258-020-01014-3

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