Fine-resolution global maps of root biomass carbon colonized by arbuscular and ectomycorrhizal fungi

Despite the recognized importance of mycorrhizal associations in ecosystem functioning, the actual abundance patterns of mycorrhizal fungi belowground are still unknown. This information is key for better quantification of mycorrhizal impacts on ecosystem processes and for incorporating mycorrhizal pathways into global biogeochemical models. Here we present the first high-resolution maps of fine root stocks colonized by arbuscular mycorrhizal (AM) and ectomycorrhizal (EcM) fungi (MgC ha−1). The maps were assembled by combining multiple open-source databases holding information on root biomass carbon, the proportion of AM and EcM tree biomass, plot-level relative abundance of plant species and intensity of AM and EcM root colonization. We calculated root-associated AM and EcM abundance in 881 spatial units, defined as the combination of ecoregions and land cover types across six continents. These maps serve as a basis for future research where continuous spatial estimates of root mycorrh..., , , , # Fine-resolution global maps of root biomass carbon colonized by arbuscular and ectomycorrhizal fungi

Dataset DOI: [10.5061/dryad.866t1g1tt](https://doi.org/10.5061/dryad.866t1g1tt)

## Description of the data and file structure

Raster files mycorrhizal roots

Raster files in .tiff format including:

·        Fine root biomass carbon stocks associated with AM fungi

·        Fine root biomass carbon stocks associated with EcM fungi

·        Herbaceous fine root biomass carbon stocks associated with AM fungi

·        Woody fine root biomass carbon stocks associated with AM fungi

·        Woody fine root biomass carbon stocks associated with EcM fungi

·        Tundra fine root biomass carbon stocks associated with AM fungi

·        Tundra fine root biomass carbon stocks associated with EcM fungi

·        Averaged number of occurrences in colonization database of AM species per each spatial unit

·        Averaged number of occurrences in colonization database of EcM species per s..., **Changes after Dec 2, 2022:** The file **AM_root_colonized.tiff** was modified to correct a technical error that occurred during the production of the previous map 

**Changes after Dec 18, 2022:** The file **AM_root_colonized.tiff** was modified to correct a technical error that occurred during the production of the previous map 
, **Changes after Dec 2, 2022:** The file **AM_root_colonized.tif** was modified to correct a technical error that occurred during the production of the previous map.

**Changes after Dec 18, 2022:** The file **AM_root_colonized.tif** was modified to correct a technical error that occurred during the production of the previous map.
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