Ecology and Biogeography of Arbuscular Mycorrhizal Fungi Belonging to the Family Gigasporaceae in La Gran Sabana Region (Guayana Shield), Venezuela

International audience ; Arbuscular mycorrhizal fungi (AMF) play a crucial role in ecosystem functioning by improving plant nutrition and resistance to environmental stress. In La Gran Sabana (LGS), a high plateau belonging to the Venezuelan Guayana Shield, with vegetation mainly composed by savannas intermixed with forests, shrublands, meadows and palm swamps, the AMF are determinant for plant survival due to the acidic, sandy and oligotrophic nature of its soils. In this region a high diversity of species of Gigasporaceae has been found and four species discovered there (Scutellospora spinos... Mehr ...