Forest-tree symbiotic relationship with fungus.
(Screenshots from Crowther Lab.)
Biomass of fungus in soil: Mostly boreal forest and coastal temperate rainforest, also Upper Amazon, Indonesian islands, Tibetan plateau.
Biomass of nematode worms in soil: Mostly boreal forest.
Both maps from Nature, 20 September 2019, reporting on fungus mapping project by Crowther Lab.
More mapping of tree-fungus symbiosis, from:
Biomass of trees with symbiotic relationship with arbuscular mycorrhizal fungus: Mostly tropical rainforest.
Biomass of trees with symbiotic relationship with ectromycorrhizal mycorrhizal fungus: Mostly boreal forest.
Phys summary of this article, 15 May 2019:
“Hidden to most observers, these inter-kingdom collaborations between microbes and trees are highly diverse. The researchers focused on mapping three of the most common types of symbioses: arbuscular mycorrhizal fungi, ectomycorrhizal fungi and nitrogen-fixing bacteria. Each of these types encompasses thousands of species of fungi or bacteria that form unique partnerships with different tree species.”