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Mycorrhizal types influence island biogeography of plants

Delavaux, Camille S.; Weigelt, Patrick; Dawson, Wayne; Essl, Franz; van Kleunen, Mark; König, Christian; Pergl, Jan; Pyšek, Petr; Stein, Anke; Winter, Marten; Taylor, Amanda; Schultz, Peggy A.; Whittaker, Robert J.; Kreft, Holger; Bever, James D.

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Authors

Camille S. Delavaux

Patrick Weigelt

Franz Essl

Mark van Kleunen

Christian König

Jan Pergl

Petr Pyšek

Anke Stein

Marten Winter

Amanda Taylor

Peggy A. Schultz

Robert J. Whittaker

Holger Kreft

James D. Bever



Abstract

Plant colonization of islands may be limited by the availability of symbionts, particularly arbuscular mycorrhizal (AM) fungi, which have limited dispersal ability compared to ectomycorrhizal and ericoid (EEM) as well as orchid mycorrhizal (ORC) fungi. We tested for such differential island colonization within contemporary angiosperm floras worldwide. We found evidence that AM plants experience a stronger mycorrhizal filter than other mycorrhizal or non-mycorrhizal (NM) plant species, with decreased proportions of native AM plant species on islands relative to mainlands. This effect intensified with island isolation, particularly for non-endemic plant species. The proportion of endemic AM plant species increased with island isolation, consistent with diversification filling niches left open by the mycorrhizal filter. We further found evidence of humans overcoming the initial mycorrhizal filter. Naturalized floras showed higher proportions of AM plant species than native floras, a pattern that increased with increasing isolation and land-use intensity. This work provides evidence that mycorrhizal fungal symbionts shape plant colonization of islands and subsequent diversification.

Citation

Delavaux, C. S., Weigelt, P., Dawson, W., Essl, F., van Kleunen, M., König, C., …Bever, J. D. (2021). Mycorrhizal types influence island biogeography of plants. Communications Biology, 4(1), https://doi.org/10.1038/s42003-021-02649-2

Journal Article Type Article
Acceptance Date Sep 7, 2021
Online Publication Date Sep 24, 2021
Publication Date 2021
Deposit Date Nov 16, 2021
Publicly Available Date Nov 16, 2021
Journal Communications Biology
Electronic ISSN 2399-3642
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 4
Issue 1
DOI https://doi.org/10.1038/s42003-021-02649-2

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http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.




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