Ectomycorrhizal fungal communities coinvading with <scp>P</scp>inaceae host plants in <scp>A</scp>rgentina: <scp>G</scp>ringos bajo el bosque

<jats:title>Summary</jats:title><jats:p> <jats:list list-type="bullet"> <jats:list-item><jats:p>Coinvasive ectomycorrhizal (<jats:styled-content style="fixed-case">ECM</jats:styled-content>) fungi allow Pinaceae species to invade regions otherwise lacking compatible symbionts, but <jats:styled-content style="fixed-case">ECM</jats:styled-content> fungal communities permitting Pinaceae invasions are poorly understood. In the context of Pinaceae invasions on Isla Victoria, Nahuel Huapi National Park, Argentina, we asked: what <jats:styled-content style="fixed-case">ECM</jats:styled-content> fungi are coinvading with Pinaceae hosts on Isla Victoria; are some <jats:styled-content style="fixed-case">ECM</jats:styled-content> fungal species or genera more prone to invade than others; and are all <jats:styled-content style="fixed-case">ECM</jats:styled-content> fungal species that associate with Northern Hemisphere hosts also nonnative, or are some native fungi compatible with nonnative plants?</jats:p></jats:list-item> <jats:list-item><jats:p>We sampled <jats:styled-content style="fixed-case">ECM</jats:styled-content>s from 226 Pinaceae host plant individuals, both planted individuals and recruits, growing inside and invading from plantations. We used molecular techniques to examine <jats:styled-content style="fixed-case">ECM</jats:styled-content> fungal communities associating with these trees.</jats:p></jats:list-item> <jats:list-item><jats:p>A distinctive subset of the <jats:styled-content style="fixed-case">ECM</jats:styled-content> fungal community predominated far from plantations, indicating differences between highly invasive and less invasive <jats:styled-content style="fixed-case">ECM</jats:styled-content> fungi. Some fungal invaders reported here have been detected in other locations around the world, suggesting strong invasion potential.</jats:p></jats:list-item> <jats:list-item><jats:p>Fungi that were frequently detected far from plantations are often found in early‐successional sites in the native range, while fungi identified as late‐successional species in the native range are rarely found far from plantations, suggesting a means for predicting potential fungal coinvaders.</jats:p></jats:list-item> </jats:list> </jats:p>