Soil aggregate stability related to soil density, root length, and mycorrhiza using site-specific Alnus incana and Melanogaster variegatus s.l.

Highlights: [•] Ectomycorrhiza fungus Melanogaster variegatus increases root length of Alnus incana. [•] Mycorrhized Alnus incana (White Alder) increases soil aggregate stability (SAS). [•] Effects of mycorrhized roots on SAS correspond to an increase in dry unit weight. [•] SAS is correlated with dry unit weight as is known for the friction angle Φ’. [•] SAS may be used to add biological effects to Φ’ in slope stability calculation. [Copyright &y& Elsevier]