Plant-soil feedback effects on conspecific and heterospecific successors of annual and perennial Central European grassland plants are correlated.

Publisher: Nature Publishing Group, a division of Macmillan Publishers Limited Country of Publication: England NLM ID: 101651677 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2055-0278 (Electronic) Linking ISSN: 20550278 NLM ISO Abbreviation: Nat Plants Subsets: MEDLINE

Original Publication: [London, UK] : Nature Publishing Group, a division of Macmillan Publishers Limited, [2015]-

Grassland* ; Soil*; Feedback ; Plants

Plant-soil feedbacks (PSFs), soil-mediated plant effects on conspecific or heterospecific successors, are a major driver of vegetation development. It has been proposed that specialist plant antagonists drive differences in PSF responses between conspecific and heterospecific plants, whereas contributions of generalist plant antagonists to PSFs remain understudied. Here we examined PSFs among nine annual and nine perennial grassland species to test whether poorly defended annuals accumulate generalist-dominated plant antagonist communities, causing equally negative PSFs on conspecific and heterospecific annuals, whereas well-defended perennial species accumulate specialist-dominated antagonist communities, predominantly causing negative conspecific PSFs. Annuals exhibited more negative PSFs than perennials, corresponding to differences in root-tissue investments, but this was independent of conditioning plant group. Overall, conspecific and heterospecific PSFs did not differ. Instead, conspecific and heterospecific PSF responses in individual species' soils were correlated. Soil fungal communities were generalist dominated but could not robustly explain PSF variation. Our study nevertheless suggests an important role for host generalists as drivers of PSFs.
(© 2023. The Author(s), under exclusive licence to Springer Nature Limited.)

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