Correction to: Nature Ecology & Evolution https://doi.org/10.1038/s41559-018-0759-0, published online 21 January 2019.

In the version of the article initially published, Fig. 1b inadvertently included a photograph of an ectomycorrhizal species, rather than an arbuscular mycorrhizal root segment. An amended image is shown below in Fig. 1. The authors thank Nianwu Tang for identifying and helping to correct the error.

Fig. 1: Revised Fig. 1.
figure 1

Image credits: a, Jinzhuang Xue; b, Nianwu Tang; c, David Read; d, Sarah Batterman. Illustration in a, J. Xue; illustrations in bd, Y. Sun.