ArticleMycorrhiza2026
The ectomycorrhizal fungal communities of 9000-year-old red spruce forests on a coastal island of northeastern North America.
Article in Mycorrhiza, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The ectomycorrhizal (ECM) fungal ecologies of old forests on islands are important to conserve but have been understudied, especially in eastern North America. In this study, we characterize the ECM fungal communities of four ~ 9000-year-old red spruce (Picea rubens) sites and one beech-birch site on a coastal island in Maine, USA, the first such study on a northeastern North American coastal island. By sampling the ECM fungi colonizing seedling roots, mature roots and root-free bulk soil, we show that the ECM communities in red spruce sites are dominated by Cenococcum, Piloderma and Cortinarius. Further, we show extremely limited ECM fungal community overlap between red spruce sites and a beech-birch site suggesting factors affecting ECM fungal communities on this island are like those on mainland. Within red spruce sites, we show substantial overlap between the ECM fungi on seedling, mature tree roots and root-free bulk soil by dominant genera and identify specific ECM fungal sequence variants found widely across these old growth stands.
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