Mycorrhizal type of woody plants influences understory species richness in British broadleaved woodlands

Guy, Petra; Sibly, Richard; Smart, Simon M. ORCID: https://orcid.org/0000-0003-2750-7832; Tibbett, Mark; Pickles, Brian J.. 2022 Mycorrhizal type of woody plants influences understory species richness in British broadleaved woodlands. New Phytologist, 235 (5). 2046-2053. 10.1111/nph.18274

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Abstract/Summary

• Mature temperate woodlands are commonly dominated by ectomycorrhizal trees, whereas understory plants predominantly form arbuscular mycorrhizal associations. Due to differences in plant–fungus compatibility between canopy and ground layer vegetation the ‘mycorrhizal mediation hypothesis’ predicts that herbaceous plant establishment may be limited by a lack of suitable mycorrhizal fungal inoculum. • We examined plant species data for 103 woodlands across Great Britain recorded in 1971 and in 2000 to test whether herbaceous plant species richness was related to the proportion of arbuscular mycorrhizal woody plants. We compared the effect of mycorrhizal type with other important drivers of woodland plant species richness. • We found a positive effect of the relative abundance of arbuscular mycorrhizal woody plants on herbaceous plant species richness. The size of the observed effect was smaller than that of pH. Moreover, the effect persisted over time, despite many woodlands undergoing marked successional change and increased understorey shading. • This work supports the mycorrhizal mediation hypothesis in British woodlands and suggests that increased abundance of arbuscular mycorrhizal woody plants is associated with greater understory plant species richness.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1111/nph.18274
UKCEH and CEH Sections/Science Areas:	Soils and Land Use (Science Area 2017-)
ISSN:	0028-646X
Additional Information. Not used in RCUK Gateway to Research.:	Open Access paper - full text available via Official uRL link.
Additional Keywords:	arbuscular mycorrhiza, Bunce survey, ectomycorrhiza, forest, herbaceous, mycorrhizal type, species richness, woodland
NORA Subject Terms:	Ecology and Environment
Date made live:	24 Oct 2022 15:58 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/533415

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