Diazotrophs and arbuscular mycorrhizal fungi (AMF) are important functional microbes that
provide and transport nutrients to plants. Diazotroph and AMF diversity and community
composition were investigated in karst mature forests (MFs) and non-karst forests, as well as
in croplands (CRs) as a reference. Diazotroph diversity and community composition
significantly shifted in MFs between karst and non-karst soils, with a higher diazotroph
richness and Shannon index in karst MFs than in non-karst soils. Similar levels of AMF …