Resumo

DEVIA-GRIMALDO, Laura Daniela; PEREZ-MONEADA, Urley Adrián; LOPEZ-D, Edwin Orlando  e  VARON-LOPEZ, Maryeimy. Arbuscular mycorrhizal fungi (AMF) in the tropical dry forest affected by fire and fluviolcanic deposits in the department of Tolima, Colombia. Rev. acad. colomb. cienc. exact. fis. nat. [online]. 2021, vol.45, n.177, pp.1137-1153.  Epub 18-Fev-2022. ISSN 0370-3908.  https://doi.org/10.18257/raccefyn.1482.

The tropical dry forest (TDF) concentrates most of the world's biodiversity nut currently it is one of the most degraded ecosystems in Colombia. For its conservation, it is important to understand the diversity of soil microorganisms that are part of it, such as the arbuscular mycorrhizal fungi (AMF). Here we evaluated the effect of fire and fluviolcanic deposits on the composition, abundance, and diversity of the AMF in tropical dry forest soils in the department of Tolima, Colombia. We selected four areas: two with native vegetation in Santafé de Los Guaduales Natural Reserve (RN) and Armero (AN), one affected by a forest fire (RQ), and another one by fluviolcanic deposits (ADV). We identified the AMF morphotypes by extracting spores directly from the soil (SD) and from trap cultures (TC) using the wet sieving method and subsequently mounting them on plates for the microscopic observation of their morphology. A total of 64 morphotypes were identified distributed in four orders, nine families, and 17 genera, the Glomeraceae family registering more indicator morphospecies. The four areas showed significant differences in their AMF communities' composition, abundance, and diversity; RQ was the area with the highest abundance and diversity followed by AN. Our results are an important contribution to the knowledge of TDF microorganism communities and their behavior in soils affected by different natural events. They also contribute to the national inventory of fungi with adaptive capacities.

Palavras-chave : Arbuscular mycorrhizal fungi; Soil fungi; Trap crops; Tropical dry forest; Disturbances.

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