Fungi 6 Glomeraceae arbuscular mycorrhiza 6 fungus 6 Acaulosporaceae 4 Argentina 4 Poaceae 4 AM-fungal-spore taxa 2 Amelichloa ambigua 2 Andes 2 Arbuscular 2 Arbuscular mycorrhizal fungi 2 Bacteria (microorganisms) 2 Buenos Aires [Argentina] 2 Defoliation 2 Deschampsia flexuosa 2 Diversisporaceae 2 Empetrum rubrum 2 Extreme environment 2 Grassland-heathland 2 Heavy metal 2 High-altitude wetlands 2 La Brava Lake 2 Livestock grazing impact 2 Nassella tenuis 2 Ovis aries 2 Pacisporaceae 2 Poa 2 Poa ligularis 2 Poa rigidifolia 2